Academic literature on the topic 'Trematoda'
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Journal articles on the topic "Trematoda"
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Orlovskaya, O. M., and N. Е. Dokuchaev. "Трематоды (Trematoda, Plathelminthes) азиатского бурундука (Tamias sibiricus) Магаданской области." Bulletin of the North-East Science Center, no. 4 (December 29, 2021): 109–16. http://dx.doi.org/10.34078/1814-0998-2021-4-109-116.
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Data on trematodes (Trematoda) of the Siberian Cipmunk (Tamias sibiricus) in Magadan Oblast are presented. Four trematode species of the two families (Plagiorchiidae Lühe, 1901 (Plagiorchis vespertilionis (Müller, 1780); Pl. elegans (Rudolphi, 1802), Pl. eutamiatis (Schulz, 1932), and Brachylaimidae Goyeux et Folay, 1930 (Brachylaima recurva (Dujardin, 1845)) are identified. An illustrated description of all the four species of trematodes, first noted in the Chipmunk in the North-East of Russia, is given.
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Post, Jason M., Rachael J. Reasch, and Emily S. Bailey. "Detection of Trematodes from the Host Exotic Aquatic Snail Melanoides tuberculata in an Urban Stormwater System." Zoonotic Diseases 2, no. 4 (December 2, 2022): 258–66. http://dx.doi.org/10.3390/zoonoticdis2040021.
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The red-rimmed melania or Malaysian Trumpet Snail, Melanoides tuberculata, is a common exotic freshwater snail that has been invading an increasing number of water bodies in North America. As a well-known host for trematodes causing human and animal diseases, the pattern of invasion and parasitic infection for this species is of great concern. Snail specimens were collected from an urban stream in Los Angeles that drains into a fragile, protected wetland ecosystem. Molecular analysis identified four trematode species: Haplorchis pumilio, Fasciola jacksoni, Parorchis sp. TH-2019, and an unclassified trematode species, Trematoda distomecercaria WN-2016. H. pumilio is responsible for haplorchiasis infections, previously considered endemic to Asia. F. jacksoni infection is a significant cause of mortality in Asian elephants. This study represents the first occurrence of F. jacksoni in North America and a novel occurrence of that trematode in association with M. tuberculata. This study also represents new occurrences of Parorchis sp. TH-2019 and an unclassified trematode species, Trematoda distomecercaria WN-2016, within California and North America. Parorchis sp. TH-2019 has previously only been documented in a marine whelk. This identification of these trematodes in association with M. tuberculata further exemplifies the need for ongoing monitoring and detection, especially considering the significance of H. pumilio and haplorchiasis to public health.
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Jabal, Arif Rahman, Hairil Akbar, Fidela Amadea Dyna Setyaji, Nathasya Rizkyana Riyadi, Abi Bakring Balyas, Ivan Permana Putra, Agnes Immanuela Toemon, and Arini Ratnasari. "Freshwater Snail as Intermediate Host of Trematode in Water Channels of Palangka Raya City." Al-Kauniyah: Jurnal Biologi 15, no. 1 (June 21, 2022): 164–70. http://dx.doi.org/10.15408/kauniyah.v15i1.25957.
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AbstrakMost of the area of Palangka Raya City consists of peat swamp land that is flooded almost all year round and river flows area. Therefore, there are many species of snails that can be found in rivers and peat swamp water. The existence of snails in peat swamp ecosystems and river flows as an intermediary host for intestinal worms for mammals and humans is essential information for human-environmental health studies. Research on the capability of snails as hosts of Trematodes on peat swamp land and river flows in Palangka Raya City has never been done. Research methods include the collection and identification of snail’s and identification Trematode larvae. We collected 557 snails, and the identification showed the identity of our samples were Ampullariidae: Pila sp., Pomacea sp., Viviparidea: Bellamya sp., and Planorbidae: Indoplanorbis sp. Pila sp. was 35.90%, the most common snail found at the study site compared to Pomacea sp., Bellamya sp., and Indoplanorbis sp.. The results of this study, snail observations confirmed the presence of trematode larvae, namely cercariae and redia. This study is the first information regarding the presence of Trematodes in the snail body at the research area.AbstrakSebagian besar area di Kota Palangka Raya merupakan lahan rawa gambut yang tergenang sepanjang tahun dan daerah aliran sungai. Hal ini membuat potensi keragaman keong yang tinggi di kedua area tersebut. Selain itu, informasi mengenai keberadaan keong sebagai inang dari Trematoda di daerah lahan rawa gambut dan aliran sungai merupakan hal yang penting dalam studi kesehatan manusia dan lingkungan. Penelitian mengenai potensi keong sebagai inang dari Trematoda di lahan gambut dan aliran sungai Kota Palangka Raya belum pernah dilakukan sebelumnya. Metode penelitian meliputi koleksi dan identifikasi dari keong yang ditemukan, serta observasi fase hidup Trematoda dalam tubuh keong. Sebanyak 557 keong berhasil dikoleksi pada penelitian ini. Hasil identifikasi keong menunjukkan keberadaan dari Ampullariidae: Pila sp., Pomacea sp., Viviparidea; Bellamya sp., dan Planorbidae: Indoplanorbis sp. Pila sp. sebesar 35,90% merupakan keong yang paling banyak ditemukan di lokasi penelitian dibandingkan dengan Pomacea sp., Bellamya sp., dan Indoplanorbis sp. Hasil observasi keong mengkonfirmasi keberadaan larva Trematoda, yakni cercariae dan redia. Penelitian ini merupakan informasi pertama mengenai keberadaan Trematoda dalam tubuh keong di lokasi penelitian.
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Rzayev, F. H. "A systematic review of flukes (Trematoda) of domestic goose (Anser anser dom.)." Biosystems Diversity 29, no. 3 (August 4, 2021): 294–302. http://dx.doi.org/10.15421/012137.
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Trematodes are one of the most numerous and widespread groups of parasitic invertebrates among helminths, characterized by a complex life cycle. As the final host, digenetic flukes parasitize vertebrates, including domestic waterfowl. Infection of hosts with parasitic digenetic worms causes huge economic damage to poultry. But trematode fauna of domestic geese are presented mainly only for individual regions. Despite the fact that there is already a systematic review of tapeworms and acanthocephala of domestic birds – geese and ducks, there are, unfortunately, no review articles on the taxonomy of digenetic flukes for geese (Anser anser dom.). Taking into account the relevance of the topic, based on our own and extensive literature data, we set the task to determine the general species composition of digenetic flukes (Trematoda), parasitizing in domestic geese which have been recorded in the world until 2020. Each Trematoda species is provided with the following data: scientific name, authority and year, first, second intermediate, auxiliary and final hosts, site in the host body, collecting localities and geographic distribution, and literature sources. Currently it is established that there are 149 species of helminths parasitising domestic geese. The taxonomic composition of the class Trematoda registered in domestic geese consists of 2 classes, 14 families, 30 genera and 65 species. Of all the species of trematodes parasitizing in domestic geese, 44 species have been recorded in Europe, 26 species in Asia, 6 species in North America, 1 species in South America, 1 species in Africa and 2 species in Oceania. Three species are registered in domestic geese (Echinoparyphium recurvatum, Echinostoma revolutum, Prosthogonimus ovatus) are cosmopolitan parasites. The biggest species diversity is characterized by the families Echinostomatidae (17 species) and Notocotylidae (12 species). There are 11 species of digenetic flukes recorded in domestic geese Cyclocoelum mutabile, Echinostoma grande, E. paraulum, E. revolutum, E. robustum, Hypoderaeum conoideum, Paryphostomum novum, P. pentalobum, Catatropis verrucosa, Notocotylus attenuatus, N. parviovatus) on the territory of Azerbaijan. Four of them (Echinostoma revolutum, Hypoderaeum conoideum, Paryphostomum novum, Notocotylus attenuatus) were also noted in the course of our helminthological studies. The trematode Cyclocoelum mutabile was recorded in domestic ducks only in Azerbaijan. Most species of trematodes were found in the north-eastern part (total 9 species) and southern part (total 5 species) of Azerbaijan. This is due to the widespread distribution of molluscs – intermediate hosts of digenetic flukes, in these regions. Eighteen species of digenetic flukes parasitize both birds and mammals (Rodentia, Carnivora, Lagomorpha, Artiodactyla). And eleven species of trematodes are of medical importance, registered in humans.
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SCHOLZ, TOMÁš. "Keys to the Trematoda. Volume II (ed. Jones, A., Bray, R. A. and Gibson, D. I.), pp. 768. Commonwealth Agricultural Bureau International (CABI Publishing), UK and The Natural History Museum, London, UK, 2005. ISBN 0 85199 587 X. £150.00." Parasitology 132, no. 1 (January 2006): 153–54. http://dx.doi.org/10.1017/s0031182005229670.
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Trematodes (flukes or digeneans) are by far the most abundant group of parasitic flatworms (Neodermata), and their importance for human and animal health is indisputable. In addition, they exhibit a variety of unique adaptations to parasitism and, probably most remarkably, possess extraordinarily complicated life-cycles. Classification of trematodes represents a very difficult task due to the huge number of existing species and variety of morphological forms, sites of infection within invertebrate and vertebrate hosts and ability to infect a wide spectrum of animals. Therefore, identification of any trematode may represent a problem even for an experienced specialist. This is the reason why I appreciated so much the publication of the first volume of the Keys to the Trematoda in 2002.
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Kaniyazov and Dilmanova. "DYNAMICS OF HORSE INFECTION WITH THE TREMATODE SCHISTOSOMA TURKESTANICUM SKRJABIN, 1913 IN KARAKALPAKSTAN." THEORY AND PRACTICE OF PARASITIC DISEASE CONTROL, no. 22 (May 19, 2021): 229–33. http://dx.doi.org/10.31016/978-5-6046256-1-3.2021.22.229-233.
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The dynamics of infection of horses with the trematode Schistosoma turkestanicum Skrjabin, 1913 in Karakalpakstan was studied. We carried out scientific research in various regions of the Republic of Karakalpakstan in 2016–2020. When determining the infection of horses with trematodes in the districts of Karakalpakstan, we used methods of complete and incomplete helminthological dissection by K. I. Skriabin (1928). A total of 143 horses were examined by the complete dissection method. The article presents the results of studies carried out on the territory of the Republic of Karakalpakstan. Helminths were found in all 143 horses examined during the study. The trematode Schistosoma turkestanicum Skrjabin, 1913 was among the identified helminths, which is very common in this region. The parasitic worms Schistosoma turkestanicum were found to belong to the Plathelminthes type, the Trematoda class. The study results indicate that the simultaneous presence of mixed (associative) invasions by trematodes was observed in horses. It was established that trematodes found in horses parasitize on blood vessels of the bile ducts, gallbladder, liver and intestinal mesentery. The prevalence of the trematode Schistosoma turkestanicum in horses was 18.8%, and the intensity of invasion was 3876–12538 specimens. The trematode Schistosoma turkestanicum, depending on the development cycle, develops in the presence of an intermediate host. Freshwater mollusks Lymnaea auricularia, belonging to the family Lymnaeidae perform the function of an intermediate host.
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Evsyukov, A. P., and M. G. Tsygankova. "Helminth Fauna of Bats of the Rostov Region: Review. 2. Trematoda." Russian Journal of Veterinary Pathology 23, no. 1 (March 28, 2024): 7–20. http://dx.doi.org/10.23947/2949-4826-2024-23-1-7-20.
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Introduction. The class of Trematoda includes two subclasses — Aspidogastrea and Digenea. Representatives of the former do not parasitize in bats. The definitive hosts for digenetic trematodes (Digenea) are vertebrates, including bats, in which the sexual generation (maritae) parasitizes. Gastropods or bivalves are the intermediate hosts. Supplementary hosts for the trematodes of bats are larvae and imagos of flying insects. Since in most cases the development of parthenites and cercariae of trematodes is related to water environment, the supplementary hosts are the groups of insects whose larvae live in the water. The list of bat species living in the Rostov region has been compiled in the previous research. In the present article the authors investigate the trematode fauna parasitizing in bats of the region under study. The aim of this review is to analyse the current state of knowledge on the species composition of the helminth parasitizing in chiropterans of the Rostov region.Materials and Methods. The research materials have been obtained from the libraries and open access resources: PubMed (pubmed.ncbi.nlm.nih.gov), CyberLeninka (cyberleninka.ru), Google Scholar (scholar.google.com), BHL (www.biodiversitylibrary.org), JSTOR (www.jstor.org). Some data has been provided by the colleagues.Results. 42 trematode species from 10 genera, 5 families and 1 order can parasitize in 15 bat species living in the Rostov region. The Lecithodendriidae family (24 species) and the genus Paralecithodendrium (9 species) are represented by a large number of species. Of the listed trematodes, 33 species used to be recorded on the territory of Russia.Discussion and Conclusion. The results of the conducted systematic review have revealed that the largest number of trematode species parasitizes in two bat species living in the Rostov region: the common noctule (27 species) and the serotine bat (24 species). The smallest number of species (4 per each) is found in the giant noctule and the soprano pipistrelle bat. Two species (Plagiorchis elegans and Plagiorchis vespertilionis) have been found in the companion cats and dogs includingly, wheras a case of the latter parazitising in humans has also been recorded. The presence of bats in the urban environment enables the full life cycle of these trematodes. There exists possibility of the companion animals and people to get infected through incidental ingestion of the infested insects.
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Utami, Ida Ayu N. S., Amy A. A. Ciptojoyo, and Ngurah Nyoman Wiadnyana. "HISTOPATOLOGI INSANG IKAN PATIN SIAM (Pangasius hypophthalmus) YANG TERINFESTASI TREMATODA MONOGENEA." Media Akuakultur 12, no. 1 (August 15, 2017): 35. http://dx.doi.org/10.15578/ma.12.1.2017.35-43.
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Ikan patin siam (Pangasius hypophthalmus) yang terinfestasi parasit trematoda monogenea tidak mudah dikenali gejala klinisnya secara spesifik, mengingat parasit ini menyerang organ insang. Infeksi parasit ini dapat menyebabkan kematian ikan sehingga sangat merugikan budidaya ikan patin siam. Tujuan penelitian adalah memberikan informasi secara histopatologi tentang perubahan jaringan insang ikan patin siam yang terinfestasi parasit trematoda monogenea. Penelitian ini diawali dengan pemeriksaan natif insang patin siam yang terinfestasi parasit trematoda monogenea dan dilanjutkan dengan pemeriksaan histopatologi. Pengambilan sampel ikan patin siam dilakukan sebanyak dua kali pada Mei dan Oktober 2015 di beberapa kolam budidaya. Pengamatan sampel dilakukan secara mikroskopik di Laboratorium Balai Karantina Ikan, Pengendalian Mutu dan Keamanan Hasil Perikanan, Palembang. Hasil penelitian menunjukkan bahwa dari total 150 sampel yang diamati terdapat 35 sampel atau kasus insang ikan yang terinfestasi parasit trematoda monogenea yaitu: masing-masing sebanyak 10 sampel diperoleh pada Mei dan 25 sampel pada Oktober. Pemeriksaan patologi terhadap organ insang yang terinfestasi trematoda monogenea menunjukkan bahwa lamella insang mengalami pembengkakan dan berwarna merah pucat. Parasit trematoda monogenea pada insang atau yang lebih dikenal dengan cacing insang memiliki panjang tubuh berkisar antara 0,7-0,9 mm dengan lebar 0,05-0,10 mm. Pengamatan histopatologi menunjukkan bahwa jaringan insang yang terinfestasi parasit trematoda monogenea ditandai adanya perubahan yang konsisten, yaitu hiperplasia tulang rawan hyalin, proliferasi sel mukus, hiperplasia lamella sekunder, dan fusi lamella sekunder. Perubahan ini dapat mengakibatkan kematian pada ikan akibat kekurangan oksigen dan perubahan osmoregulasi ion dalam tubuh ikan.The gills of striped catfish (Pangasius hypophthalmus) infested with parasitic trematodes monogenea are not easy to observe specifically clinical symptoms, the parasite is very harmful to the striped catfish farming. The objective of the study was to provide histopathologic information about changes in gill tissue of infected pangasius fish infested with monogeneous trematoda parasites. This study begun with an examination of native gill of striped catfish and fish infested with parasitic trematodes monogenea and continued with histopathologic examination. Striped catfish samplings were performed twice in May and October 2015 in some aquaculture ponds. Sampel analysis was done microscopically in Laboratorium of Fish Quarantine, Quality Control and Fisheries Product Safety Palembang. The results showed that among of 150 samples there were 35 samples of fish infested with parasitic trematodes monogenea, which of 10 and 25 samples were collected in May and October, respectively. The results on clinical symptoms of infected gills trematodes monogenea showed that gills swelled in lamella gills and pale red. The parasitic trematodes monogenea found in the gills which are well known as the gill worm had a body length ranging from 0.7 to 0.9 mm with a width of 0.05 to 0.10 mm. On examination of the gills infested with parasitic trematodes monogenea the histopathological changes were consistent, namely hyalin cartilage hyperplasia, mucous cell proliferation, hyperplasia secondary lamella, and the fusion of the secondary lamella. These changes could be affected on fish mortality due to lack of oxygen and ion osmoregulation changes in the body of the fish.
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Elmajdoub, Layla Omran, Kholoud Abdullah Emshihee, Fatma Muftah Abushiba, Sara Emhmmed Elzwawy, Mabrooka Muosa Abusahal, and Rowida Salem Aagme. "Prevalence and Morphological Identification of Digenean Trematode Species Recovered from Infected Organs of Lizardfish (Saurida undosquamis)." European Journal of Zoology 2, no. 2 (November 6, 2023): 1–6. http://dx.doi.org/10.24018/ejzoo.2023.2.2.26.
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Helminthic parasites of the marine fish (Saurida undosquamis) are investigated. Out of 192 specimens of the Saurida undosquamis were collected from the local market of Misurata city in Libya. The prevalence rate of Trematoda helminths in examined fish Saurida undosquamis, was high. Based on the morphological and morphometric characterization represented different species of Trematoda (Lecithochirium sp., Lecithochirium grandiporum, Aponurus laguncula, Neotorticaecum sp, Allocreadium sp, and Gonocerca sp.) was isolated of the total examined fish (185%, 96.4%) were infected with different species of Trematoda. The density of Trematoda was around 9390, and they were collected from the gills, stomach, and anterior and posterior parts of the intestine in all seasons, but Trematode infection was observed in the liver and muscles, the high-density rate in winter (4199), followed by autumn (3291), with non-significant differences between density rates in all seasons (P > 0.05). This study found a high infection rate with Lecithochirium sp. in the examined Saurida undosquamis.
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Chandra, Satish, and A. M. Saxena. "New digenetic trematode parasite Masenia lucknowensis sp. nov. (Trematoda: Maseniidae) from fresh water fishes of Uttar Pradesh (India)." Brazilian Journal of Biological Sciences 3, no. 5 (2016): 241. http://dx.doi.org/10.21472/bjbs.030523.
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Genus Masenia Chatterji, 1933 (Trematoda: Maseniidae Yamaguti, 1954) is one of the most important digenean trematode parasite with wide geographic distribution in the world. The purpose of the present study was to describe morphological and morphometrical characteristics of digenetic trematodes. The present study was carried out in fresh water fish fauna of River Gomti, Daliganj at Lucknow (26o 51' 30" N, 80o 56' 14" E). We have found that fresh water fishes heavily infected with various helminthes parasites. We have recovered large number of digenean parasites which belong to genus viz. Masenia Chatterji, 1933. During the survey (2012, Daliganj Lucknow) of fresh water digenetic trematode parasites, collected three different species of the genus Masenia, out of these one is new species, another are redescribed to show certain variation, the new parasite was obtain from the intestine of fish Mystus vittatus (Bloch, 1794) (Actinopterygii: Bagridae).
Dissertations / Theses on the topic "Trematoda"
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Wolber, Jens-Erik. "Möglichkeiten der alternativen arzneimittelfreien Bekämpfung des fischpathogenen Trematoden Bucephalus polymorphus Baer, 1827 (Trematoda: Bucephalidae)." [S.l. : s.n.], 2004. http://www.diss.fu-berlin.de/2004/215/index.html.
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Pinto, Hudson Alves. "Infecção natural de Melanoides tuberculata (Mollusca: Thiaridae) por Centrocestus formosanus (trematoda: Heterophyidae) e por Philophthalmus gralli (Trematoda: Philophthalmidae) no Brasil." Universidade Federal de Minas Gerais, 2009. http://hdl.handle.net/1843/SAGF-8H9QEZ.
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Visando avaliar aspectos biológicos e taxonômicos de trematódeos transmitidos por Melanoides tuberculata (Müller, 1774) no Brasil, coletas malacológicas foram realizadas na represa da Pampulha, Belo Horizonte, Minas Gerais, no período entre março de 2006 a julho de 2009. De 38344 exemplares de M. tuberculata coletados e examinados, 279215 (7,36%) apresentaram-se infectados por larvas de trematódeos que, após caracterização morfológica preliminar, foram utilizadas para estudos biológicos experimentais. Estágios evolutivos obtidos (cercárias, metacercárias, rédias, parasitos adultos, ovos e/ou miracídios) foram estudados in vivoa fresco e após processo de fixação, coloração e montagem de lâminas permanentes, seguida de análise morfológica e morfométrica em microscópio de luz. Cercárias do tipo Pleurolofocerca foram encontradas em 206 268 (7,03%) exemplares de M. tuberculata e utilizadas para a infecção de Poecilia reticulata Peters, 1859. Metacercárias obtidas nas brânquias dos peixes 30 dias após a infecção foram inoculadas por via oral a Mus musculus (Linnaeus, 1758) da linhagem AKR/J e parasitos adultos recuperados no intestino delgado dos camundongos 30 dias após infecção DPI foram identificados como Centrocestus formosanus (Nishigori, 1924). Outro tipo cercariano, do grupo Megalura, foi encontrado em 11 (0,33%) exemplares de M. tuberculata coletadoslarvas do . Estas larvas formaram metacercárias em substrato sólido que foram utilizadas para a infecção de Gallus gallus domesticus (Linnaeus, 1758) jovens. Parasitos adultos obtidos da membrana nictitante e saco conjuntival das aves, 30 dias após infecção, foram identificados como Philophthalmus gralli Mathis & Leger, 1910. Este é o primeiro registro de ambas as espécies de trematódeos em M. tuberculata no Brasil.
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Tomba, Abbie Marie Feminella Jack W. "Effects of trematode parasites on habitat use and disturbance response of freshwater snails in the genus Elimia." Auburn, Ala., 2006. http://repo.lib.auburn.edu/Send%2012-15-07/TOMBA_ABBIE_52.pdf.
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João, Roberto Carlos Ferreira. "Schistosoma mansoni (Trematoda: Digenea) Sambom, 1907: diagnóstico ultraestrutural e laboratorial." reponame:Repositório Institucional da FIOCRUZ, 2011. https://www.arca.fiocruz.br/handle/icict/6315.
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DISSERTAÇÃO COMPLETA Final-2011.pdf: 13824393 bytes, checksum: c510c0328a108faa0f62ed4228a0215f (MD5)Made available in DSpace on 2013-02-19T17:12:31Z (GMT). No. of bitstreams: 1 DISSERTAÇÃO COMPLETA Final-2011.pdf: 13824393 bytes, checksum: c510c0328a108faa0f62ed4228a0215f (MD5) Previous issue date: 2011
A esquistossomose é uma das parasitoses mais prevalentes no mundo e o Schistosoma mansoni Sambon, 1907 é o trematódeo agente da esquistossomose intestinal, endêmica em países da América do Sul, África, Oriente Médio e Caribe. Em Angola, os primeiros dados da esquistossomose foram registrados em 1897 na província do Bengo, mas a prevalência do S. mansoni é, no entanto pouco notificada. No âmbito da cooperação internacional Fiocruz (Brasil)-Fesa (Angola) que visa capacitar no Brasil profissionais da área de Saúde de Angola, este trabalho está voltado para estudos sobre a caracterização ultraestrutural e diagnóstico laboratorial do S. mansoni. Os objetivos incluíram: estudar a topografia de adultos de S. mansoni; caracterizar os tubérculos do tegumento do macho por microscopia eletrônica de varredura, de transmissão e por microscopia a laser confocal; descrever um método alternativo para exame de fezes, baseado no princípio de Kato-Katz, utilizando o fixador SAF e comparar o método Kato-Katz utilizado para o diagnóstico da esquistossomose com o método alternativo. A topografia dos machos evidenciou a presença de tubérculos na superfície dorsal do corpo que em cortes ultrafinos aparecem como evaginações tegumentares que abrem espaço entre as fibras musculares elevando as membranas basal e apical. Entre estas membranas que revestem os tubérculos, há vesículas eletrondensas, eletronlúcidas e corpos alongados. As vesículas formadas na região interna do tegumento, próximo ao núcleo das células são encontradas nos canais citoplasmáticos que chegam à superfície externa do sincício. Os espinhos dos tubérculos aparecem sobre a membrana basal, próximos às vesículas eletrondensas. No tegumento há organelas sensoriais contendo bulbo basal e projeção apical com cílio e corpos basais. O canal ginecóforo apresenta espinhos pequenos, uniformes e organelas sensoriais uniciliadas. A camada entre a membrana basal e a apical é mais homogênea e os espinhos aparecem de forma uniforme no tegumento sem a formação de tubérculos. Utilizando o diagnóstico laboratorial pelo Kato-Katz não foi possível visualizar os ovos no momento da montagem da lâmina (0h), mas a incidência de visualização aumentou em 24h. Na técnica modificada do SAF, os ovos foram identificados imediatamente e a visualização diminuiu ao longo do tempo. Comparando em função do tempo, as médias da análise de ovos por grama de fezes (OPG) das três infecções nas duas técnicas, observou-se que o número de ovos encontrados com a técnica de SAF (0h) foi maior em 7,7% do que com Kato-Katz (24 h). Não houve diferença significativa entre os resultados obtidos com SAF (0h) e Kato-Katz (24 h). O mesmo resultado foi verificado com 12 horas para as duas técnicas. No segundo experimento o OPG pelo SAF (1h) foi 13,1% maior do que Kato-Katz (24h) de leitura. Comparando os resultados obtidos nas duas técnicas com 24 h de leitura, o OPG foi 32,5% maior na técnica de Kato-Katz do que SAF. O método experimental baseado no fixador SAF é eficiente para diagnóstico laboratorial alternativo, simples, rápido, de baixo custo e eficiente para o diagnóstico de esquistossomose mansônica. Este estudo trará novos avanços no diagnóstico desta doença em Angola.
Schistosomiasis is one of the most prevalent parasitic diseases in the world and the trematode Schistosoma mansoni Sambon, 1907 is the agent of intestinal schistosomiasis, endemic in countries of South America, Africa, Middle East and the Caribbean. In Angola, the infection was first recorded in 1897 in the Bengo province, however the prevalence of S. mansoni remains underestimated. In the framework of an international cooperation between Fiocruz (Brazil)-Fesa (Angola), which aims to train health professionals from Angola in Brazil, this work is focused on ultrastructural studies and laboratory diagnosis of S. mansoni. The objectives included: to study the topography of adult S. mansoni; to characterize the tubercles of the tegument of the male by scanning and transmission electron microscopy and laser confocal microscopy; to describe an alternative method for stool examination, based on the principle of Kato-Katz method, using the SAF fixative, and compare the Kato- Katz method used for the diagnosis of schistosomiasis with the alternative method. The topography of the males showed the presence of tubercles on the dorsal surface of the body that in ultrathin cuts appear like tegumentary evaginations that interweave between the muscle fibers raising the basal and apical membranes. Between these membranes that cover the tubercles, there are electrondense and electronlucid vesicles, and elongated bodies. The vesicles formed in the inner region of the integument near the cell nucleus are found inside the cytoplasmic channels reaching the outer surface of the syncytium. The spines of the tubercles emerge over the basal membrane, near the electrondense vesicles. The integument has sensory organelles containing a basal bulb and apical projection with cilium and basal bodies. The ginecoforous channel presents uniform small spines, and uniciliate sensory organelles. The layer between the basal and apical membrane is more homogeneous with spines appearing evenly, without forming tubercles. The laboratory diagnosis using the Kato-Katz method was not successful to show the eggs at time (0h), but the display increased at 24h after the sampling. The modified technique of the SAF, showed the eggs immediately and display decreased over time. Comparing both methods by time, the mean number of eggs per gram of feces (EPG) by two techniques of the three infections, we found that the number of eggs found with the technique of SAF (0h) was higher by 7.7% than with Kato-Katz (24 h). There was no significant difference between the results obtained with SAF (0h) and Kato-Katz (24 h). The same result was observed for 12 hours with both techniques. In the second experiment, the EPG by SAF (1h) was 13.1% higher than Kato-Katz (24h). Comparing the results of the two techniques with 24 hours of sampling, the EPG was 32.5% higher in the Kato-Katz technique than SAF. The experimental method based on the SAF fixative is an efficient alternative for laboratory diagnosis, being simple, fast, inexpensive and efficient for the diagnosis of schistosomiasis. This study will bring new advances in the diagnosis of this disease in Angola.
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Bernardon, Fabiana Fedatto. "Helmintos de aves aquáticas (Pelecaniformes: Ardeidae) do sul do Brasil." Universidade Federal de Pelotas, 2013. http://repositorio.ufpel.edu.br/handle/ri/2321.
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Previous issue date: 2013-02-27The Ardeidae family is composed of more than 60 species, being one of the largest and most representative families of birds with characteristics adapted to wetlands. Rio Grande do Sul is characterized by presenting ecosystems which harbor a unique diversity of waders, where there is the record of 13 species of Ardeidae. Due to lack of information on the diversity of helminths in the Ardeidae family in Rio Grande do Sul, the work was developed with the goal of identifying the helminthfauna of nine species of Ardeidae and determine the parameters of prevalence, mean abundance and mean intensity. Were examined 30 birds of the Ardeidae family (Pelecaniformes), Ardea alba , Ardea cocoi, Butorides striata, Bubulcus ibis, Egretta thula, Ixobrychus involucris, Nycticorax nycticorax , Syrigma sibilatrix e Tigrisoma lineatum from the natural environment of the cities of Pelotas, Capão do Leão e Rio Grande, RS, Brazil. The birds were necropsied to collect helminths, prepared in accordance with the protocols used for each group and identified. As a result there was obtained species of Trematoda, Nematoda and Acanthocephala and their parasitological parameters as follow below: Trematoda: Digenea, Amphimerus interruptus (P=3,3%; AM=0,1; IM= 3,0), Apharyngostrigea ardearum (P=40%; AM=18,6; IM= 46,6), Ascocotyle sp. (P=33,3%; AM=88,4; IM= 265,3), Clinostomum complanatum (P=30%; AM=1,1; IM= 3,8), Episthmium proximum (P=23,3%; AM=1,0; IM=4,2), Ithyclinostomum dimorphum (P=6,6%; AM=0,1; IM=2,5), Nephrostomum limai (P=10%; AM= 0,3; IM=3,6), Ribeiroia insignis (P=10%; AM=2,8; IM=28,0 ) and Stomylotrema sp. (P=3,3%; AM=0,03; IM=1,0) belonging to eight families: Nematoda: Contracaecum microcephalum (P=80%; AM=15,1; IM=18,8), Desportesius invaginatus (P=43,3%; AM=2,76; IM=6,3), Desmidocercella ardeae (P=16,6%; AM=1,3; IM=8,0), Eustrongylides sp. (P=13,3%; AM=1,3; IM=10,2) and Baruscapillaria sp. (P=10%; AM=0,5; IM=5,0). Acanthocephala: Acanthocephalus sp. (Echinorhynchidae) (P=3,33%; AM=0,03; IM=1,0), Andracantha sp. (P=33,3%; AM=15,2; IM=45,8), Arhythmorhynchus sp. (P=6,66%; AM=0,16; IM=2,5) and Polymorphus sp. (Plagiorhynchidae) (P=13,3%; AM=1,3; IM=10,2). Tigrisoma lineatum was the only negative for all groups Ixobrychus involucris was negative for the presence of Trematoda and Bubulcus ibis negative for acanthocephalans. The Trematoda, Nematoda and Acanthocephala mentioned above are for the first time recorded in the Ardeidae family in Rio Grande do Sul in Brazil, some of the hosts and their helminth characterizes first occurrence. We have found insulated proglottids of cestodes in small and large intestine in some birds, but could not identify them.
A família Ardeidae é composta por mais de 60 espécies sendo uma das maiores e mais representativas famílias de aves com características adaptadas às áreas úmidas. O Rio Grande do Sul caracteriza-se por apresentar ecossistemas que abrigam uma diversidade ímpar de aves pernaltas onde há o registro de 13 espécies de ardeídeos. Devido a escassez de informações sobre a diversidade de helmintos em Ardeidae no Rio Grande do Sul, desenvolveu-se o trabalho com o objetivo de identificar a helmintofauna de nove espécies de ardeídeos e determinar a os parâmetros de prevalência, abundância e intensidade médias. Foram examinados 30 aves. Ardea alba, Ardea cocoi, Butorides striata, Bubulcus ibis, Egretta thula, Ixobrychus involucris, Nycticorax nycticorax, Syrigma sibilatrix e Tigrisoma lineatum, provenientes de ambiente natural dos municípios de Pelotas, Capão do Leão e Rio Grande RS, Brasil. As aves foram necropsiadas para a coleta dos helmintos, preparadas de acordo com os protocolos utilizados para cada grupo e identificadas. Como resultado obteve-se espécies de trematódeos, nematóides e acantocéfalos e seus parâmetros parasitológicos como seguem a seguir: Trematoda: Digenea, Amphimerus interruptus (P=3,3%; AM=0,1 ;IM=3,0), Apharyngostrigea ardearum (P=40%; AM=18,6; IM= 46,6), Ascocotyle sp. (P=33,3%; AM=88,4; IM= 265,3), Clinostomum complanatum (P=30%; AM=1,1; IM=3,8), Episthmium proximum (P=23,3%; AM=1,0; IM=4,2), Ithyclinostomum dimorphum (P=6,6%; AM=0,1; IM=2,5), Nephrostomum limai (P=10%; AM= 0,3; IM=3,6), Ribeiroia insignis (P=10%; AM=2,8; IM=28,0) e Stomylotrema sp. (P=3,3%; AM=0,03; IM=1,0) pertencentes a oito famílias; Nematoda: Contracaecum microcephalum (P=80%; AM=15,1;IM=18,8),Desportesius invaginatus(P=43,3%; AM=2,76; IM=6,3), Desmidocercella ardeae (P=16,6%; AM=1,3; IM=8,0), Eustrongylides sp. (P=13,3%; AM=1,3; IM=10,2) e Baruscapillaria sp. (P=10%; AM=0,5; IM=5,0). Acanthocephala: Acanthocephalus sp. (Echinorhynchidae) (P=3,33%; AM=0,03; IM=1,0), Andracantha sp. (P=33,3%; AM=15,2; IM=45,8), Arhythmorhynchus sp. (P=6,66%; AM=0,16; IM=2,5) e Polymorphus sp. (Plagiorhynchidae) (P=13,3%; AM=1,3; IM=10,2). Tigrisoma lineatum foi o único ardeídeo negativo para todos os grupos, enquanto que Ixobrychus involucris quanto à presença de trematódeos e Bubulcus ibis quanto à presença de acantocéfalos. Os trematódeos, nematóides e acantocéfalos citados anteriormente são pela primeira vez registrados em ardeídos no Rio Grande do Sul. No Brasil, alguns dos hospedeiros e respectivos helmintos constituem primeira ocorrência. Foram encontradas proglotes isoladas de cestóides no intestino delgado e grosso em algumas aves, porém não foi possível identificá-las.
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Zellmer, Patricia J. "The identification and characterization of Caecidotea racovitzai (Isopoda) as the ecologically important second intermediate host of the invasive trematode Leyogonimus polyoon (Trematoda), and aspects of the natural history of each on Shawano Lake, Wisconsin /." Link to full text, 2009. http://epapers.uwsp.edu/thesis/2009/Zellmer.pdf.
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Thesis (M.S.)--University of Wisconsin--Stevens Point, 2009.Submitted in partial fulfillment of the requirements of the degree Master of Science in Natural Resources (Wildlife), College of Natural Resources. Includes bibliographical references (leaves 167-174).
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Carter, Phoebe Kate Louise. "The impact of low concentrations of cadmium on host-monogenean interactions." Thesis, University of Stirling, 2003. http://hdl.handle.net/1893/2593.
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Interpreting data gathered from field studies that investigate the effect of pollution on fish parasites is complicated by the presence of multiple parasite species and mixed pollutant loads. The aim of this study was, therefore, to use controlled experimental studies to assess the impact of a single heavy metal, cadmium, on selected species of the monogenean genera, Dactylogyrus Diesing, 1850 and Gyrodactylus von Nordmann, 1832 and on their hosts, Cyprinus carpio L. and Poecilia reticulata (Peters). The first host-monogenean system investigated was the gill fluke Dactylogyrus extensus Mueller & Van Cleave, 1932 and its host C. carpio; the second system, Gyrodactylus - P. reticulata, involved individual investigations on Gyrodactylus turnbulli Harris, 1986 and G. bullatarudis Turnbull, 1956. Independent investigations of parasite biology and host responses were undertaken in order to elucidate host-parasite interactions in the presence of cadmium. The maximum permitted level of cadmium in controlled freshwater sources is set at 5μg/l by EEC Directive 76/464/EEC and experiments were carried out using this concentration and the higher, but environmentally realistic, levels of 20-50μg/l. For the first time it has been demonstrated that Dactylogyrus extensus exposed to 5μg/l cadmium show a subtle enhancement in the in vitro rate of oviposition and a statistically significant enhancement in their in vivo rate of oviposition after 9-10 days exposure. The effect of cadmium on egg production by D. extensus and on selected aspects of the innate immune response of C. carpio were investigated in separate experiments. Although run independently of each other, the sample times of both experiments were the same. It was found that the treatment in which the rate of oviposition by the parasite was greatest, was the treatment, where at the same sample point, the phagocytic activity of C. carpio was greatest. Exposure of D. extensus to the higher level of 30μg/l cadmium, also enhanced egg production after 9 days, but, 14-30 days exposure resulted in a lower rate of oviposition than that recorded in control parasites, suggesting that cadmium may directly, as well as indirectly, influence the reproductive biology of this parasite species. The hatching of D. extensus eggs was similarly affected by cadmium exposure, with those produced and incubated in 5μg/l cadmium demonstrating a statistically significant more rapid hatch rate than the controls, while those produced and incubated at the higher concentration (30μg/l) showed a statistically significant slower rate of hatch than the controls. Exposure of adult D. extensus to cadmium concentrations ranging from 5 to 3,400μg/l in vitro resulted in an enhancement of survival above the controls. Only at 13,100μg/l cadmium was there a statistically significant reduction in survival and in vitro egg production. Atomic adsorption spectrometry demonstrated that D. extensus is a net accumulator of cadmium, with the concentration of cadmium accumulated by the parasite, increasing with increasing exposure concentrations. The degree of cadmium accumulation in C. carpio organs was in the order of gills > kidney > liver > muscle=spleen. Even at 5μg/l, the level of cadmium detected in the muscle (ca. 0.2μg/g) exceeded the permitted level in food fish (0.05 mg/kg (μg/g), after only 9 days exposure. The haematological and immunological responses of C. carpio exposed to 5μg/l cadmium showed only subtle differences from the control fish, with these differences being most marked in the early stages of the trial (days 9-14). By the end of the trial there was little difference in the responses of these fish from the controls, suggesting that carp can adapt to low-level cadmium exposure. Cadmium at 50μg/l resulted in exaggerated alterations to the immune responses of carp, with statistically higher cortisol levels, phagocytic activity of kidney phagocytes, granulocyte number and significant lymphopenia, at days 6 to 14 of the trial. Several of these changes are indicative of a typical stress response. The respiratory burst and phagocytosis of kidney phagocytes in C. carpio appear to be linked to the level of cortisol, with both factors increasing as cortisol levels fall, suggesting that the effects of cadmium on the immune system may be mediated to some extent via the production of corticosteroids. Cadmium at concentrations below the permitted maximum caused statistically significant increases in the population size of both Gyrodactylus bullatarudis Turnbull, 1956 and G. turnbulli Harris, 1986 on P. reticulata. Statistically significant differences in the population size of G. turnbulli were also recorded between male and female P. reticulata. Exposing P. reticulata to 5μg/l cadmium resulted in little difference in the respiratory burst of kidney phagocytes and the production of myeloperoxidase when compared to the same parameters in control fish. The phagocytic activity of these fish was, however, consistently elevated above the controls. Exposure to 20μg/l cadmium resulted in a further enhancement of both phagocytosis and respiratory burst in P. reticulata. Unlike, C. carpio, no adaptation to cadmium exposure was observed in P. reticulata within a 30-day period. During the trial, subtle differences in the innate immune parameters of male and female guppies also emerged. None of the three innate immune parameters investigated, i. e. phagocytic activity, respiratory burst and myeloperoxidase production, appeared to correlate to the observed differences in the population growth of G. turnbulli. The finding that cadmium at levels below its permitted maximum can significantly increase numbers of Gyrodactylus spp. to the detriment of P. reticulata, suggests that the water quality guidelines, with regard to the permitted concentration of this metal, should be reviewed. This study has provided the first information on the effects of low concentrations of cadmium on selected monogenean parasites and their hosts and has been the first to attempt to elucidate host-parasite interactions in the presence of this metal. The study has provided a range of interesting findings and has offered several avenues for further investigations into a complex field of research that is still in its infancy.
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NOVAES, M. T. "Caracterização química e atividade anti-helmíntica in vitro do citral e dos óleos essenciais de Cymbopogon citratus e Cymbopogon wynterianus sobre adultos de Fasciola hepatica." Universidade Federal do Espírito Santo, 2017. http://repositorio.ufes.br/handle/10/7798.
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Previous issue date: 2017-07-31O parasito Fasciola hepatica é um trematódeo que acomete o fígado de bovinos, ovinos, animais silvestres e humanos. É responsável por grandes perdas econômicas em diversos países. A resistência em F. hepatica, principalmente ao triclabendazol, tem estimulado a busca de produtos alternativos para a fasciolose. Diante disto, objetivou-se com este estudo avaliar a atividade do óleo essencial (OE) de Cymbopogon citratus (capimlimão) e de seus componentes majoritários citral (neral + geranial) bem como do OE de Cymbopogon wynterianus (citronela) nas concentrações 0,025%, 0,05% e 0,1% (m v-1) sobre parasitos adultos de F. hepatica. Os OEs foram extraídos utilizando um aparelho do tipo Clevenger e o citral foi obtido comercialmente e estes foram caracterizados por cromatografia gasosa (CGDIC e CG-EM). Foram utilizados oito adultos de F. hepatica para cada grupo em placas de Petri individuais e estas foram analisadas após três, doze e quinze horas, sendo utilizado um exemplar de F. hepatica de cada grupo para a análise histológica. Para a análise dos dados, foi utilizado a tabela de contingência para o teste do qui-quadrado. Após 15h de análise, observou-se que o OE de C. citratus e o citral inibiram a motilidade da F. hepatica em todas as concentrações testadas e o OE de C. wynterianus apenas nas concentrações de 0,05 e 0,1% (m v-1 ). Nos OEs e no citral houve a perda de espinhos e de uma das camadas do tegumento, com exceção do citral na concentração de 0,025% (m v-1) onde os espinhos e os tegumentos continuaram presentes.
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Silva, Gilcia Aparecida de Carvalho. "Estudos sobre xifidiocercarias (Trematoda) e seu parasitismo em larvas de mosquitos (Diptera : Culcidae)." [s.n.], 2000. http://repositorio.unicamp.br/jspui/handle/REPOSIP/314448.
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Orientadores: Carlos Fernando Salgueirosa de Andrade, Marlene Tiduko UetaDissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Biologia
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Resumo: O presente trabalho teve por objetivo avaliar a ocorrência de xifidiocercárias na região de Campinas e em duas localidades no Vale do Ribeira, Estado de São Paulo e estudar o parasitismo das mesmas sobre larvas de mosquitos da família Culicidae em condições experimentais. Realizaram-se coletas de moluscos em corpos de água doce na região de Campinas e nos municípios de Registro e Miracatu no Vale do Ribeira, Estado de São Paulo, no período de setembro de 1996 a fevereiro de 1999. Foram coletadas as espécies Lymnaea columella, Physa marmorata, Biomphalaria tenagophila, Drepanotrema cimex e D. lucidum. Também foram coletados exemplares de Biomphalaria e Drepanotrema os quais não foram dissecados para a confirmação da espécie, podendo pertencer à uma das espécies acima identificadas. Após a exposição dos moluscos à luz incandescente de 60 W encontrou-se exemplares de limneídeos provenientes de Miracatu, SP, apresentando uma variação de 0,2 a 1,0% de parasitismo por cercárias de Fascio/a hepatica, 0,4 a 8,3% de parasitismo por xifidiocercárias (Haematoloechidae) e 3,3% de parasitismo por cercárias de equinostomatídeo, além de moluscos planorbídeos parasitados por furcocercárias (prevalência de 1,5%), cercárias de equinostomatídeo com 14,1% de prevalência e 1,5 a 15,6% de parasitismo por xifidiocercárias. As xifidiocercárias encontradas em planorbídeos eram diferentes das obtidas de limneídeos. Em Louveira, SP, foi encontrado um exemplar de Biomphalaria sp. parasitado por furcocercárias (1,9%). Na localidade ROSA em Campinas, SP encontrou-se um exemplar de Biomphalaria sp. e um de L. columella parasitados por furcocercárias (7,6%) e cercárias de equinostomatídeo (1,5%), respectivamente. Na lagoa da UNlCAMP, atrás da Faculdade de Educação Física (UNI-I), também em Campinas, encontrou-se um exemplar de L. columella parasitado por furcocercárias (2,3%). Três exemplares de B. tenagophila provenientes de Miracatu, estavam duplamente infectados por furcocercárias, tanto com ocelo como sem esta estrutura totalizando 3,8% de parasitismo por estas cercárias, além de seis moluscos da mesma espécie (4,3%) com infecção dupla por xifidiocercárias e cercárias de equinostomatídeo. Dois exemplares de L. columella da mesma localidade, também apresentaram infecção dupla por xifidiocercárias e cercárias de F. hepatica (4,4%) e um exemplar com xifidiocercárias e equinostomatídeo (1,7%). Houve também infecção dupla por xifidiocercárias e rédias em quatro moluscos, que apresentou parasitismo variando de 1,2 a 3,2%. Estudou-se a morfologia das xifidiocercárias eliminadas por L. columella e comparou se com descrições de outros autores. Com estes estudos, concluiu-se que as mesmas pertenciam a subordem Plagiorchiata, fanúlia Haematoloechidae, mais provavelmente gênero Haematoloechus. Tais cercárias, quando colocadas em contato com larvas de mosquitos das espécies Culex quinquefasciatus, Aedes albopictus ou Ae. aegypti, penetraram e encistaram nas larvas, formando as metacercárias. Observou-se em geral atraso no desenvolvimento das larvas de culicídeos parasitadas, que na maioria das vezes evoluíram até a morte. A infecção nas larvas foi sempre de 100% e a mortalidade máxima nos experimentos foi de 72,2% para larvas de Cx. quinquefasciatus, 100% para Ae. albopictus e 95% para Ae. aegypti. Verificou-se ainda, que quando não ocorreu a morte das larvas infectadas pelas xifidiocercárias, destas emergiam adultos infectados com metacercárias vivas e bem ativas. Também foi feita uma simples infecção experimental em rãs da espécie Rana catesbeiana, considerando-se anfibios como possíveis hospedeiros definitivos. Larvas de mosquito parasitadas por xifidiocercárias foram oralmente administradas às rãs, mas não foi possível recuperar nenhum trematódeo nos órgãos dos anfibios
Abstract: The present work airned to evaluate the xiphidiocercariae occurrence in Campinas region and two places in Vale do Ribeira, São Paulo State, and to study the xiphidiocercariae parasitism in mosquitoes larvae (Culicidae) under experimental conditions. Snails were collected ITom ITesh water collections in the region of Campinas, Registro and Miracatu in the Vale do Ribeira, São Paulo State, in the period ITom September-1996 to February-1999. The species collected were Lymnaea columella, Physa marmorata, Biomphalaria tenagophila, Biomphalaria sp., Drepanotrema cimex, D. lucidum and Drepanotrema sp. After exposing the snails to incandescent light (60 W), lymnaeid snails ITom Miracatu, SP, infected by Fasciola hepatica were found presenting of 0,2 to 1,0% of parasitism, besides 0,4 to 8,3% of parasitism with xiphidiocercariae (Haematoloechidae) and 3,3% of parasitism with echinostomatid cercariae. For the same locality planorbid snails were found parasited with furcocercariae (1,5% of prevalence), with echinostomatid cercariae (14,1% of prevalence) and xiphidiocercariae ITom 1,5 to 15,6% of parasitism. The xiphidiocercariae found in planorbid were different ITom that obtained ITom lymnaeid. In Louveira, SP it was found one Biomphalaria sp. snail infected with furcocercariae (1,9%). In the ROSA place (Campinas), SP it was found an individual of Biomphalaria sp. and one of L. columella infected by furcocercariae (7,6%) and echinostomatid cercariae (1,5%), respectively. In the place UNI-I, also in Campinas, one L. columella was infected by furcocercariae (2,3%). Three individuaIs of B. tenagophila from Miracatu were double infected by two types of furcocercariae, (with or without ocellus), totaling 3,8% of parasitism for these cercariae, besides six snails of the same species (4,3%) with double infection for xiphidiocercariae and echinostomatid cercariae. Two L. columella from the same place, also presented double infectionfor xiphidiocercariae and F. hepatica (4,4%) and an exemplary with xiphidiocercariae and echinostomatid cercariae (1,7%). There was also double infection for xiphidiocercariae and rediae in four snails that presented a parasitism varying of 1,2 to 3,2%. The morphology of the xiphidiocercariae eliminated by L. columella was studied and comparison with other authors descriptions. From these studies, it was possible to conc1ude the cercariae belonging to the suborder Plagiorchiata, family Haematoloechidae, and probably genus Haematoloechus. When in contact with mosquitoes larvae of the species Culex quinquefasciatus, Aedes albopictus or Ae. aegypti, such cercariae penetrated and encysted in the larvae forming metacercàriae. It was observed in general a developmental of delay the culicid larvae caused by the parasitism that most of the time developed to the death. The infection in the larvae was always accomplished (100%) and the maximum mortality in the experiments was of 72,2% to Cx. quinquefasciatus larvae, 100% for Ae. albopictus and 95% for Ae. aegypti. It was still veritied that when the death do not occured to the xiphidiocercariae infected larvae, the resulting adults were infected with ative and very active metacercariae. It was also made a simple experimental infection in frogs of the specie Rana catesbeiana, considering amphibians as possible definitive host. Mosquito larvae parasited by xiphidiocercariae where orally administred to the frogs but it was not possible to recover any trematode in the amphibians organs
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Nolan, Matthew John. "Sanguinicolidae von Graff, 1907 (Platyhelminthes : Digenea) of Indo-West Pacific fishes /." [St. Lucia, Qld.], 2005. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe19026.pdf.
Full textBooks on the topic "Trematoda"
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Nguyẽ̂n, Thị Lê, and Duy Ngọ Hà. Sán lá ký sinh ở động vật Việt Nam. Hà Nội: Nhà xuất bản Khoa học tự nhiên và công nghệ, 2010.
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I, Gibson David, Jones Arlene, and Bray Rodney Alan, eds. Keys to the Trematoda. Wallingford, UK: CABI Pub. and the Natural History Museum, 2002.
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Ian, Gibson David, Jones Arlene, and Bray Rodney Alan, eds. Keys to the Trematoda. New York: CABI Pub., 2001.
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Movsesi︠a︡n, S. O. Trematody fauny i︠u︡ga Malogo Kavkaza: Fauna of the south of the Low Caucasus Trematodes. Moskva: Nauka, 2004.
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Ginet͡sinskai͡a, T. A. Trematodes, their life cycles, biology, and evolution. New Delhi: Amerind Pub., 1988.
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Gibson, D. I., A. Jones, and R. A. Bray, eds. Keys to the Trematoda: Volume 1. Wallingford: CABI, 2002. http://dx.doi.org/10.1079/9780851995472.0000.
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Jones, A., R. A. Bray, and D. I. Gibson, eds. Keys to the Trematoda: Volume 2. Wallingford: CABI, 2005. http://dx.doi.org/10.1079/9780851995878.0000.
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Bray, R. A., D. I. Gibson, and A. Jones, eds. Keys to the Trematoda, Volume 3. Wallingford: CABI, 2008. http://dx.doi.org/10.1079/9780851995885.0000.
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Barshene, I͡A. Kariotipy trematod. Vilʹni͡us: ["Academia"], 1993.
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Galaktionov, K. V. Proiskhozhdenie i ėvoli͡u︡t͡s︡ii͡a︡ zhiznennykh t͡s︡iklov trematod. Sankt-Peterburg: Nauka, 1998.
Find full textBook chapters on the topic "Trematoda"
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Despommier, Dickson D., and John W. Karapelou. "Trematoda." In Parasite Life Cycles, 67–91. New York, NY: Springer New York, 1987. http://dx.doi.org/10.1007/978-1-4612-3722-8_3.
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Gries, Oliver, and Thomas Ly. "Trematoda (Saugwürmer)." In Infektologie - Kompendium humanpathogener Infektionskrankheiten und Erreger, 543–58. Berlin, Heidelberg: Springer Berlin Heidelberg, 2019. http://dx.doi.org/10.1007/978-3-662-58219-0_79.
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Wilson, Mark. "Trematoda: Schistosomes." In Immunity to Parasitic Infection, 287–305. Chichester, UK: John Wiley & Sons, Ltd, 2012. http://dx.doi.org/10.1002/9781118393321.ch16.
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Piekarski, Gerhard. "Trematoda — Cestoda — Nematoda." In Medical Parasitology, 301–3. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-72948-5_11.
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Kostadinova, Aneta, and Ana Pérez-del-Olmo. "The Systematics of the Trematoda." In Advances in Experimental Medicine and Biology, 21–44. New York, NY: Springer New York, 2014. http://dx.doi.org/10.1007/978-1-4939-0915-5_2.
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Kostadinova, Aneta, and Ana Pérez-del-Olmo. "The Systematics of the Trematoda." In Advances in Experimental Medicine and Biology, 21–42. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-18616-6_2.
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Kostadinova, Aneta, and Ana Pérez-del-Olmo. "The Systematics of the Trematoda." In Advances in Experimental Medicine and Biology, 47–72. Cham: Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-60121-7_2.
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Schumann, Andrew, and Ludmila Akimova. "Process Calculus and Illocutionary Logic for Analyzing the Behavior of Schistosomatidae (Trematoda: Digenea)." In Computational Intelligence, Medicine and Biology, 81–101. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-16844-9_5.
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Dhaliwal, B. B. Singh, and Prayag Dutt Juyal. "Trematode Zoonoses." In Parasitic Zoonoses, 41–63. New Delhi: Springer India, 2013. http://dx.doi.org/10.1007/978-81-322-1551-6_3.
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Ignatius, Ralf, and Gerd-Dieter Burchard. "Trematoden." In Medizinische Mikrobiologie und Infektiologie, 895–900. Berlin, Heidelberg: Springer Berlin Heidelberg, 2020. http://dx.doi.org/10.1007/978-3-662-61385-6_86.
Full textConference papers on the topic "Trematoda"
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Shakarboev, E. B., J. E. Zhumamuratov, and G. A. Khosilova. "ASSOCIATIVE TREMATODIASIS OF CATTLE IN NORTH-WESTERN AND SOUTHERN UZBEKISTAN." In THEORY AND PRACTICE OF PARASITIC DISEASE CONTROL. All-Russian Scientific Research Institute for Fundamental and Applied Parasitology of Animals and Plant – a branch of the Federal State Budget Scientific Institution “Federal Scientific Centre VIEV”, 2023. http://dx.doi.org/10.31016/978-5-6048555-6-0.2023.24.526-531.
Full textAbstract:
The purpose of this work is to study the spread and species composition of pathogens
of trematode infections among cattle in North-Western and Southern Uzbekistan.
The studies were carried out on the territory of the Republic of Karakalpakstan,
Khorezm and Kashkadarya Regions in 2020–2023. Helminthological material was
collected in all seasons of the year. In total, 364 heads of cattle were examined by
complete and partial helminthological dissections. As a result of the studies carried
out in the northwestern and southern regions of Uzbekistan, 9 trematode species
belonging to 7 genera, 5 families and 4 orders of the class Trematoda were recorded.
In the northwestern region, 175 heads of cattle (65.3%) out of 268 examined animals
were infected with certain trematode species. Of those infected, 124 had associative
invasions, and 51 had monoinvasions. In the southern regions, 41 animals (43.2%)
out of 96 examined animals were infected with trematodes. Of the infected animals,
27 (65.8%) were infected with mixed trematode infections, and 14 (34.1%), with
monoinvasions. Of 9 trematode species under consideration with natural and
synanthropic focality, Schistosoma, Fasciola, and Dicrocelium were recorded.
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Shakarboev, E. B., A. S. Berdibaev, G. A. Khosilova, and Z. S. Abdukodirova. "DISTRIBUTION OF TREMATODES OF VERTEBRATES BY REGIONS OF UZBEKISTAN." In THEORY AND PRACTICE OF PARASITIC DISEASE CONTROL. VNIIP – FSC VIEV, 2024. http://dx.doi.org/10.31016/978-5-6050437-8-2.2024.25.451-456.
Full textAbstract:
The purpose of this research is to study the distribution of trematodes of vertebrates by individual regions of Uzbekistan. Helminthological material was collected from vertebrates in the eastern, northeastern, central, southern, and northwestern parts of the Republic. The trematode infection rate in vertebrates was determined by complete and partial helminthological dissections of animals. During 2000- 2023, 3,380 vertebrate animals were examined using the method of complete helminthological dissections. Trematodes of the vertebrate fauna in Uzbekistan were represented by 186 species (174 species in adult form and 12 species in larval form) belonging to 89 genera, 35 families, 13 orders and two subclasses (Bucephalidea and Prosostomidea) of the Trematoda class. The research results showed that the quantitative ratio of trematodes of vertebrates prevailed in the northeastern region where 128 species were recorded; 70 in the northwestern region; per 31 species in the central and eastern regions, and 21 species in the southern region. Of 186 trematode species, the most pathogenic were representatives of the families Fasciolidae, Echinostomatidae, Paramphistomatidae, Dicrocoeliidae, Prosthogonomidae, Alaridae, Diplostomidae, Brachylaimidae, Notocotylidae, Bilharziellidae and Schistosomatidae in Uzbekistan and had epizootological and epidemiological significance. In this connection, when organizing anthelminthic measures, it is necessary to consider the degree of species distribution and its morphobiological characteristics. This will ensure the effectiveness of taken measures and livestock survival and increase animal productivity.
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Kaniyazov, A. J., A. I. Dilmanova, and I. E. Sarsenbaev. "INFECTION OF DONKEYS BY TREMATODA FASCIOLA GIGANTICA (COBBOLD, 1855) IN KARAKALPAKSTAN." In THEORY AND PRACTICE OF PARASITIC DISEASE CONTROL. VNIIP – FSC VIEV, 2024. http://dx.doi.org/10.31016/978-5-6050437-8-2.2024.25.158-162.
Full textAbstract:
The research purpose was to study the infection of donkeys by the trematode Fasciola gigantica (Cobbold, 1855) of the Fasciolidae family in Karakalpakstan. Materials for the study were collected throughout the Republic of Karakalpakstan. During this period, 31 animals were examined by complete or partial helminthological dissections per Academician K. I. Skryabin (1928). In addition, 156 fecal samples were taken from the donkeys and examined using helminthocoprological methods. When determining the species composition of helminths found in the research conducted in the Republic of Karakalpakstan, attention was paid to their morphological characteristics and localization. According to the development cycle, Fasciola gigantica is a biohelminth and develops with an intermediate host. The intermediate host’s functions are performed by freshwater mollusks of the Lymnaeidae family. The results of the analysis found Fasciola gigantica in the examined donkeys and determined that it belonged to the phylum Plathelminthes, class Trematoda, order Fasciolida, family Fasciolidae, genus Fasciola. The Fasciola gigantica prevalence in the body of the donkeys was 6.4%, and the invasion intensity, 3–19 specimens. Throughout the study, morphological characteristics of the species Fasciola gigantica were studied. Based on the morphological characteristics, the body of Fasciola gigantica was somewhat oblong with the length of 30–75 mm.
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Manikovskaya, N. S., and L. V. Nacheva. "ON THE SEVERTSOV-PLATE FUNCTION INTENSIFICATION PRINCIPLE BY THE EXAMPLE OF THE INTESTINES OF HEPATIC TREMATODE PARAFASCIOLOPSIS FASCIOLAEMORPHA EJSMONT, 1932 (PLATHELMINTHES, TREMATODA)." In THEORY AND PRACTICE OF PARASITIC DISEASE CONTROL. All-Russian Scientific Research Institute for Fundamental and Applied Parasitology of Animals and Plant – a branch of the Federal State Budget Scientific Institution “Federal Scientific Centre VIEV”, 2023. http://dx.doi.org/10.31016/978-5-6048555-6-0.2023.24.285-289.
Full textAbstract:
The study considers morphological and functional features of the intestine of
the trematode Parafasciolopsis fasciolaemorpha in the context of its endostation,
namely, the bile ducts in the liver of the moose Alces alces (1st order environment),
which reveal mechanisms that ensure the parasite adaptation. The intestine of P.
fasciolaemorpha is covered with epithelium, while its apical part is represented by thin
microvilli, and the basal part contains nuclei and reticular cytoplasm. The epithelium
is delimited from parenchyma by a basal membrane of a collagenous nature. Intense
bromphenolophilia and toluidinophilia manifested at the apical end of the microvilli
indicate the accumulated glycoproteins and involvement in the breakdown of food, as
well as in the increase in the enterocyte resistance to antigenic effects of the host and
the manifestation of anticoagulant properties. Enterocytes function in analogy with
microapocrine secretion, and digestion is mainly parietal (and partially abdominal). The microvilli in the apical part of the intestinal epithelium increase the working
surface area and accelerate the processes of parietal digestion with enhancing the
trophic processes of the helminth P. fasciolaemorpha to survive in the host organism,
which helps small parasites to adapt in the endostation. The study results serve as a
clear illustration of the Severtsov-Plate function intensification principle.
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Kirjusina, Muza. "APPLICATION OF NOVEL SYNTHESIZED LUMINOPHORE AZP5 FOR EFFICIENT STAINING OF TREMATODA: FASCIOLIDAE PARASITES." In 18th International Multidisciplinary Scientific GeoConference SGEM2018. Stef92 Technology, 2018. http://dx.doi.org/10.5593/sgem2018/6.2/s25.004.
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Mochalova, N. V., N. B. Terenina, N. D. Kreshchenko, E. L. Voropaeva, and S. O. Movsesyan. "THE MUSCULAR SYSTEM OF THE PARASITE OF THE STERLET Acrolichanus AURICULATUS (TREMATODA: ALLOCREADIIDAE)." In THEORY AND PRACTICE OF PARASITIC DISEASE CONTROL. VNIIP – FSC VIEV, 2024. http://dx.doi.org/10.31016/978-5-6050437-8-2.2024.25.280-284.
Full textAbstract:
The paper presents data of the histochemical study of the muscular system of trematode Acrolichanus auriculatus, an intestinal parasite of the sterlet. Using fluorophore-conjugated phalloidin and confocal scanning laser microscopy, the musculature of the body wall, oral and ventral suckers, and digestive system of the parasite were described. The body wall musculature of A. auriculatus contains three layers of muscle fibers: circular, longitudinal, and diagonal muscle fibres. The distribution of muscle fibers along the parasite body were irregular; there were no diagonal muscle fibers in the posterior part of the body. In the region of the lower edge of the genital pore, a complex of muscle fibers was identified which extended from the lower edge of the genital pore to different directions. Several types of muscle fibers were found in oral and abdominal suckers. In the (ventral, dorso-lateral, and dorso-medial) lobes of the oral sucker, the transverse and longitudinal muscle fibers were identified. We described muscles of the pharynx that contained longitudinal, circular, and radial muscle fibers, and the intestine including longitudinal and circular muscles. A comparative analysis confirms the thesis of great diversity in the organization of the trematode muscles and shows the presence in various trematode representatives of both general (conservative) and specific characteristics typical for one or another attribute type.
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Romashov, B. V., and N. B. Romashova. "DEFINITIVE HOSTS OF ALARIA ALATA (TREMATODA, STRIGEIDIDA) IN NATURAL CONDITIONS OF THE CENTRAL BLACK EARTH REGION (VORONEZH AND LIPETSK REGIONS)." In THEORY AND PRACTICE OF PARASITIC DISEASE CONTROL. All-Russian Scientific Research Institute for Fundamental and Applied Parasitology of Animals and Plant – a branch of the Federal State Budget Scientific Institution “Federal Scientific Centre VIEV”, 2023. http://dx.doi.org/10.31016/978-5-6048555-6-0.2023.24.386-390.
Full textAbstract:
Currently in the Central Black Earth Region, an increase in cases of infection of wild
and domestic carnivores with the trematode Alaria alata (Trematoda, Strigeidida)
has been recorded. Helminthological materials were collected in the Voronezh
Nature Reserve and in adjacent territories (Voronezh and Lipetsk Regions) for
more than 20 years (2000–2022). More than 100 species of carnivorous mammals
of the Canidae family were studied. A. alata maritae were recorded in four predator
species: the wolf, fox, raccoon dog, and the domestic dog. The total infection rate in
4 Canidae species was 78.3%. The highest infection prevalence was registered in the
wolf, 97.0%, and the raccoon dog, 100%, and slightly lower in the fox, 81.8%. For
the domestic dog, the incidence of Alaria species was found at the level of 34.4%.
In the study area, the fox was the most numerous predator. The fox had significant
infection prevalence values and the highest relative abundance of maritae (infection
intensity and abundance index). A fairly large sample of foxes was studied in adjacent
territories that were mainly agricultural lands. Relatively high levels of infection were
detected: the IP 75.9%; the II 162.0; and the AI 122.9. The fox plays the leading role
in the circulation of alariosis in the Central Black Earth Region.
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Moskvin, A. S. "MORPHOLOGICAL ARTIFACTS ON HISTOLOGIC SPECIMENS OF PARAMPHISTOMIDS (TREMATODA, PARAMPHISTOMIDAE) AND THEIR ROLE IN CORRECT DIAGNOSIS OF SPECIES." In THEORY AND PRACTICE OF PARASITIC DISEASE CONTROL. VNIIP – FSC VIEV, 2024. http://dx.doi.org/10.31016/978-5-6050437-8-2.2024.25.275-279.
Full textAbstract:
The introduction of a histological method into practice of species diagnostics of trematodes of the suborder Paramphistomata Skrjabin et Schulz, 1937, contributed to regular reports on the discovery of new trematode species in the family Paramphistomidae Fischoeder, 1901. At the same time, several new species were described based on identification of specific histological morphological characteristics which in fact turned out to be artifacts in subsequent detailed analysis. Based on this argument, paramphistomid species described in domestic literature sources, namely, Cotylophoron skrjabini, Cotylophoron vigisi, Ceylonocotyle petrowi, Liorchis hiberniae and Liorchis scotiae are considered as invalid. The cause of morphological artifacts on histological sections of paramphistomids are firstly non–standardized or incorrect primary treatment with fixing chemical agents of parasite isolates detected during necropsy in definitive hosts; secondly, errors in the implementation of general histological technique elements which in the applied approach are critically important and require the development of methodologic modernization adapted to work with biological objects with morphological traits; thirdly, incorrect subjective perception of histological artifacts, their false acceptance as distinctive species characters that have diagnostic value in taxonomy of the family representatives. It is necessary to develop optimized methodological techniques adapted to the applied purpose of teaching methods based on general histological technology elements the implementation of which will help to avoid morphological artifacts on histological sections of paramphistomids.
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Itin, G. S., and V. M. Kravchenko. "HELMINTHIC CENOSES OF THE EURASIAN BADGER (MELES MELES, L., 1758) IN THE NORTH-WESTERN CAUCASUS." In THEORY AND PRACTICE OF PARASITIC DISEASE CONTROL. All-Russian Scientific Research Institute for Fundamental and Applied Parasitology of Animals and Plant – a branch of the Federal State Budget Scientific Institution “Federal Scientific Centre VIEV”, 2023. http://dx.doi.org/10.31016/978-5-6048555-6-0.2023.24.194-198.
Full textAbstract:
On the territory of the North-Western Caucasus from 2010 to 2022, 60 badgers
from 3 landscape-geographical zones were studied by the method of complete
helminthological dissection. The prevalence and intensity of invasion, abundance
index and dominance index were calculated. Infection of badgers with helminths
was 100%. Helminthic cenosis was represented by 20 species of parasitic worms
from 4 classes Trematoda, Cestoda, Nematoda and Acanthocephala, and 16
families. The detected helminths included 6 trematode species (30.0%), 3 cestode
species (15.0%), 10 nematode species (55.0%) and one species of Acanthocephala
(5.0%). Nineteen helminth species were found in the plain zone, 15 species in the
foothill zone, and 9 species in the mountainous zone. The dominant trematode
species was Euparyphium melis (the II average 32.0 specimens; AI 9.6; DI 16.5%).
Subdominant species were Alaria alata (the II average 16.4 specimens; AI 5.5; DI
9.4%) and Pharyngostomum cordatum (II average 31.5 specimens; AI 3.1; DI 5.4%).
The dominant cestode species was M. lineatus (II average 11.0 specimens; AI 5.1;
DI 8.8%), and subdominant species was T. crassiceps (II average 7.3 specimens; AI
2.8; DI 4.8%). The dominant nematode species was U. stenocephala (II average 37.5
specimens; AI 17.5; DI 30.1%), and subdominant species were Molineus patens (II
average 24.6 specimens; AI 4.5; DI 7.8%), and Thominx aerophilus (II average 7.6
specimens; AI 2.4; DI 4.1%). Analysis of the stomach contents of the badgers showed
that a significant proportion of the diet consisted of animal feed which was present in
the stomach of 90.0% of the examined animals. Fragments of rodents, amphibians,
reptiles, fish, insects, mollusks, and annelids were found in their stomach.
10
Arepbaev, I. M., A. R. Ravshanova, J. M. Yorqulov, F. D. Akramova, U. A. Shakarbaev, and D. A. Azimov. "ECOLOGICAL AND FAUNAL STUDIES OF HELMINTHS OF WETLAND BIRDS IN UZBEKISTAN." In THEORY AND PRACTICE OF PARASITIC DISEASE CONTROL. All-Russian Scientific Research Institute for Fundamental and Applied Parasitology of Animals and Plant – a branch of the Federal State Budget Scientific Institution “Federal Scientific Centre VIEV”, 2023. http://dx.doi.org/10.31016/978-5-6048555-6-0.2023.24.52-57.
Full textAbstract:
The importance of wetlands for humanity is very high. They provide a huge number
of people in the world with their water and biological resources, determine the
stability of local climatic conditions, and serve as habitats for many sedentary and
migratory waterfowl and semiaquatic birds. In the reservoirs of the transboundary
rivers Amudarya, Syrdarya and Zarafshan (within Uzbekistan), numerous species
of wetland birds are concentrated, which are poorly studied in terms of parasitology.
The paper presents some features of the helminth fauna in wetland birds of NorthWestern, Central and North-Eastern Uzbekistan. The material for this work
was the collection of parasitic worms of waterfowl, marsh and semiaquatic birds
caught in the water bodies of the Amudarya, Syrdarya and Zarafshan river basins
(within Uzbekistan) during the hunting season (2018–2022). More than 750 birds
belonging to 40 species, 26 genera, 15 families and 9 orders were collected and
studied. The studied birds turned out to be infected with helminths of 4 classes,
Cestoda, Trematoda, Acanthocephala and Nematoda. One hundred seventeen
species were identified: 29 species belonged to the cestode class, the trematode
class was represented by 67 species, the nematode class, by 27 species, and the
acanthocephalan class by 4 species. Original data on the structure of the helminth
fauna of 9 orders of birds were presented. Various transmission ways of helminths to
the final hosts were elucidated.
Reports on the topic "Trematoda"
1
Simon, Michael. Euryhelmis cotti N. Sp. (Trematoda: Heterophyidae) with observations on its life cycle. Portland State University Library, January 2000. http://dx.doi.org/10.15760/etd.960.
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2
Niemi, Delbert. Life Cycle, Additions to Biology, and New Hosts of Apophallus Donicus (Trematoda: Heterophyidae) in Oregon. Portland State University Library, January 2000. http://dx.doi.org/10.15760/etd.1611.
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3
Ficht, Allison R., J. H. Waite, Barbara L. Doughty, and W. M. Kemp. Synthesis of Stable Microcapsules from Trematode Eggshell Components. Fort Belvoir, VA: Defense Technical Information Center, June 1990. http://dx.doi.org/10.21236/ada224516.
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4
Low Genetic Diversity in Wide-Spread Eurasian Liver Fluke Opisthorchis felineus Suggests Special Demographic History of This Trematode Species. LJournal, 2017. http://dx.doi.org/10.18411/a-2017-114.
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