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Academic literature on the topic 'Hymenolepis'

Author: Grafiati

Published: 4 June 2021

Last updated: 6 February 2022

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Journal articles on the topic "Hymenolepis"

1

Bøgh, Henrik O., Jørgen P. B. Christensen, and Jørn Andreassen. "Complement-mediated lysis in vitro of newly excysted tapeworms: Hymenolepis diminuta, Hymenolepis microstoma, Hymenolepis nana and Hymenolepis citelli." International Journal for Parasitology 16, no. 2 (April 1986): 157–61. http://dx.doi.org/10.1016/0020-7519(86)90100-1.

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2

Hench, Juergen, Gieri Cathomas, and Matthias S. Dettmer. "Hymenolepis nana." Medicine 96, no. 50 (December 2017): e9146. http://dx.doi.org/10.1097/md.0000000000009146.

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3

Schmidt, Jürgen, and Andreas Ruppel. "Interaction of Hymenolepis diminuta and Hymenolepis microstoma with complement." International Journal for Parasitology 18, no. 5 (July 1988): 675–82. http://dx.doi.org/10.1016/0020-7519(88)90103-8.

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4

Mead, Robert W., Nick Zappas, John Thomford, and Martha A. Krump. "Developmental Changes in Hymenolepis citelli and Hymenolepis diminuta during Patency." Journal of Parasitology 72, no. 6 (December 1986): 908. http://dx.doi.org/10.2307/3281843.

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5

Ayu Habsari, Ika, and Tri Mulyowati. "IDENTIFICATION OF EGGS HYMENOLEPIS NANA AND HYMENOLEPIS DIMINUTA IN RAT FECES AND CHILDREN'S FECESIN DUKUH SRATEN, KECAMATAN PEDAN, KLATEN." Journal of Health (JoH) 7, no. 2 (July 27, 2020): 71–77. http://dx.doi.org/10.30590/joh.v7i2.192.

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Rats are animals that are susceptible to being infected with dengerous diseases because they like dirty environments. Hemintheasis spread by rats, namely hymenolepiasis.transsmision of this worm disease can occur directly and indirectly. Direct trasmission is caused by consuming water or food contaminated with worm egg while direct trasmission occur through intermediate fleas. The purpose of the study was to determine the presence of Hymenolepis Nana dan Hymenolepis Diminuta eggs in rats faeces and childern’s faeces in hamlet sraten, and to find out what percentage of faeces of mice and faeces of childern’s infected with Hymenolepis Nana dan Hymenolepis Diminuta. The method used is direct method which is macroskopis and microskopis and indirect method of sedimentation examination. Faecel sampling is done by simple random sampling. Based on the results of examination of 30 rats samples and 17 faeces samples the childern obtained result of second faeces samples of mice positively infected with Hymenolepisdiminuta eggs or at 6,67%, in the childern’s faeces samples not Hymenolepis Diminuta eggs were found. Whereas Hymenolepis Nana infection was not found in the rat faeces samples or childern’s faeces samples or with a negative 100% percentage.

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6

Galan-Puchades, M. T. "Hymenolepis nanavs.Taenia soliumlife cycle." Parasite Immunology 37, no. 8 (July 28, 2015): 429. http://dx.doi.org/10.1111/pim.12204.

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7

Gardner, Scott Lyell, and Gerald D. Schmidt. "Cestodes of the genus Hymenolepis Weinland, 1858 sensu stricto from pocket gophers Geomys and Thomomys spp. (Rodentia: Geomyidae) in Colorado and Oregon, with a discriminant analysis of four species of Hymenolepis." Canadian Journal of Zoology 66, no. 4 (April 1, 1988): 896–903. http://dx.doi.org/10.1139/z88-132.

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Cestodes found to represent previously undescribed members of the genus Hymenolepis s.str. (Yamaguti 1959) were recovered from pocket gophers, Geomys bursarius (Shaw), in northeastern Colorado. Hymenolepis weldensis n.sp. and Hymenolepis geomydis n.sp., not occurring together in any individual host, were found in 3 and 8%, respectively, of pocket gophers examined for helminths. The life cycle of H. weldensis was completed in the laboratory using beetles, Tenebrio molitor (L.), as intermediate hosts, and pocket gophers of three genera (Geomys, Thomomys, and Pappogeomys) as definitive hosts. Development of H. weldensis did not occur in laboratory rats, Rattus norvegicus (Berkenhout). Morphologic relationships four species of Hymenolepis (H. diminuta, H. tualatinensis, H. weldensis, and H. geomydis) were analyzed using multiple discriminant function analysis, which clearly allocated individual cestodes to the respective groups and discriminated species.

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8

Kusumadewi, Suryaningtyas, Risa Tiuria, and Ridi Arif. "Prevalensi Kecacingan pada Usus Ayam Kampung di Pasar Tradisional Jakarta dan Kota Bogor." Acta VETERINARIA Indonesiana 8, no. 1 (January 31, 2020): 1–9. http://dx.doi.org/10.29244/avi.8.1.1-7.

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Penelitian ini bertujuan untuk mengidentifikasi dan mengukur prevalensi kecacingan di usus ayam kampung yang ada di pasar tradisional Jakarta dan Kota Bogor. Usus ayam kampung diambil dari 5 pasar yang ada di Jakarta (Bendungan Hilir, Palmerah, Pasar Minggu, Pluit, dan Jatinegara) dan di 4 pasar yang ada di Kota Bogor (Anyar, Bogor, Jambu Dua, Gunung Batu). Sampel yang diambil sebanyak 5 sampel di setiap pasar dengan total 45 sampel. Hasil penelitian menunjukkan 28 dari 45 sampel usus ayam kampung (Gallus domesticus) yang diperiksa di pasar tradisional Jakarta dan Bogor positif mengalami kecacingan. Hasil prevalensi menunjukkan pasar Jakarta sebesar 56% dan pasar Bogor sebesar 70%. Prevalensi berdasarkan jenis-jenis cacing di Pasar Jakarta adalah; Railletina echinobothrida (52%), Heterakis gallinnarum (32%), Railletina tetragona (24%), Hymenolepis carioca (16%), Ascaridia galli (16%), dan Hymenolepis cantaniana (4%). Prevalensi berdasarkan jenis-jenis cacing yang ditemukan di Pasar Bogor adalah Railletina echinobothrida (70%), Railletina tetragona (55%), Heterakis gallinarum (10%), Hymenolepis carioca (30%), Hymenolepis cantaniana (20%), dan Railletina cesticillus (20%).

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9

Cho, C. H. "Pancreatic secretion is the migratory cue for Hymenolepis diminuta in rat small intestine." Journal of Helminthology 59, no. 4 (December 1985): 319–21. http://dx.doi.org/10.1017/s0022149x0002589x.

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ABSTRACTPylorus and bile-duct restrictions did not prevent the anteriad migration of Hymenolepis diminuta in rat small intestine after food feeding. However, migration was inhibited when the common bile-duct was occluded. The results indicate that pancreatic secretion is the migratory cue for Hymenolepis diminuta in rats.

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10

Evans, William S., Ceayon McKenzie, Marie Novak, and Hatem Howlader. "The effects of various maintenance conditions on the survival of hymenolepidid cysticercoids." Canadian Journal of Zoology 67, no. 2 (February 1, 1989): 259–62. http://dx.doi.org/10.1139/z89-037.

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Cysticercoids of Hymenolepis microstoma, Hymenolepis nana, and Hymenolepis diminuta were examined for their ability to excyst in vitro after being stored in balanced salt solution, distilled water, or the bodies of dead hosts (Tribolium confusum). The number capable of excysting decreased as the duration of the storage period was increased but the rate of decrease varied with the storage medium and was invariably slower when the parasites were stored at 4 °C than when they were kept at 22 °C. The combination of storage medium and temperature that produced the slowest rate of decrease in the ability of the parasites to excyst varied according to species.

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Dissertations / Theses on the topic "Hymenolepis"

1

Taylor, Kathryn. "Immunobiology of Hymenolepis spp. in rodents." Thesis, Keele University, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.314606.

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2

Phillips, Angela. "Hymenolepis diminuta : monosaccharide absorption by the cysticercoid." Thesis, Keele University, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.716854.

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3

au, Marion Macnish@abcrc org, and Marion Macnish. "Characterisation of Community-Derived Hymenolepis Infections in Australia." Murdoch University, 2001. http://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20050930.111325.

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Hymenolepis nana is a ubiquitous parasite, found throughout many developing and developed countries. Globally, the prevalence of H. nana is alarmingly high, with estimates of up to 75 million people infected. In Australia, the rates of infection have increased substantially in the last decade, from less than 20% in the early 1990s to 55 - 60% in these same communities today. Our knowledge of the epidemiology of infection of H. nana is hampered by the confusion surrounding the host specificity and taxonomy of this parasite. The suggestion of the existence of two separate species, Hymenolepis nana von Siebold 1852 and Hymenolepis fraterna Stiles 1906, was first proposed at the beginning of the 20th century. Despite ongoing discussions in the subsequent years it remained unclear, some 90 years later, whether there were two distinct species, that are highly host specific, or whether they were simply the same species present in both rodent and human hosts. The ongoing controversy surrounding the taxonomy of H. nana has not yet been resolved and remains a point of difference between the taxonomic and medical literature. The epidemiology of infection with H. nana in Australian communities is not well understood as the species present in these communities has never been identified with certainty. It is not clear which form of transmission commonly occurs in Australia, whether the H. nana strain/species present in the north-west of Western Australia is present in human and rodent hosts, or whether humans harbour their own strain/sub-species of Hymenolepis. Furthermore, it is not known whether mice are a potential zoonotic source for transmission of Hymenolepis to human hosts. In this study, 51 human isolates of H. nana were inoculated into highly susceptible laboratory rodent species. However, these failed to develop into adult worms in all instances, including when rodent species were chemically and genetically immunosuppressed.In addition, 24 of these human isolates were also cross-tested in the flour beetle intermediate host, Tribolium confusum. Of these, only one isolate developed to the cysticercoid stage in beetles, yet when inoculated into laboratory rodents, the cysticercoids also failed to develop into adult stage. Since isolates of H. nana infecting humans and rodents are morphologically indistinguishable, the only way they can be reliably identified is by comparing the parasite in each host using molecular criteria. In the current study, three regions of ribosomal DNA, the small subunit (18S), the first internal transcribed spacer (ITS1) and the intergenic spacer (IGS) were chosen for genetic characterisation of Hymenolepis spp. from rodent and human hosts from a broad geographic range. In addition, a mitochondrial gene, the cytochrome c oxidase subunit 1 (C01) gene and a non-ribosomal nuclear gene, paramyosin, were characterised in a number of Hymenolepis isolates from different hosts. A small PCR fragment of 369 bp, plus a larger fragment of 1223 bp, were sequenced from the 18S gene of reference isolates of H. nana and the rat tapeworm H. diminuta. Minimal sequence variation was found in the two regions of the 18S between these two morphologically distinct, phylogenetically recognised species, H. nana and H. diminuta, and this indicated that the 18S gene was too conserved for further genetic characterisation of isolates of H. nana from different hosts. A large number of human isolates of H. nana (104) were characterised at the ITS1 using PCRrestriction length fragment polymorphism (PCR-RFLP). The profiles obtained were highly variable and often exceeded the original size of the uncut fragment. This was highly suggestive of the existence of ribosomal spacers that, whilst identical in length, were highly variable in sequence. To overcome the problems of the variable PCR-RFLP profiles, further characterisation of the ITS1, by cloning and sequencing 23 isolates of H. nana, was conducted and this confirmed the existence of spacers which, although similar in length (approximately 646 bp), differed in their primary sequences. The sequence differences led to the separation of the isolates into two clusters when analysed phylogenetically. This sequence variation was not, however, related to the host of origin of the isolate, thus was not a marker of genetic distinction between H. nana from rodents and humans. Indeed, the levels of variability were often higher within an individual isolate than between isolates, regardless of whether they were collected from human or mice hosts, which was problematic for phylogenetic analysis. In addition, mixed parasite infections of H. nana and the rodent tapeworm H. microstoma were identified in four humans in this study, which was unexpected and surprising, as there have been no previous reports in the literature documenting humans as definitive hosts for this parasite. Further studies are required, however, to determine if the detection of H. microstoma in humans reflects a genuine, patent infection or an atypical, accidental occurrence. Sequencing of the mitochondrial cytochrome c oxidase 1 gene (C01) in a number of isolates of Hymenolepis nana from rodents and humans identified a phylogenetically supported genetic divergence of approximately 5% between some mouse isolates compared to isolates of H. nana from humans. This provided evidence that the mitochondrial C01 gene was useful for identifying genetic divergences in H. nana that were not resolvable using nuclear loci. Despite a morphological identity between isolates of H. nana from rodent and human hosts, the genetic divergence observed between isolates at the mitochondrial locus was highly suggestive that H. nana is a species complex, or cryptic species (= morphologically identical yet genetically distinct). In addition, whilst not supported by high bootstrap values, a clustering of the Australian human isolates into one uniform genetic group that was phylogenetically separated from all the mouse isolates was well supported by biological data obtained in this study. To confirm the phylogeny of the C01 tree a small segment of the nuclear gene, paramyosin, was sequenced in a number of isolates from humans and rodents. However, this gene did not provide the level of heterogeneity required to distinguish between isolates from rodent and human hosts. The high sequence conservation of the paramyosin gene characterised in this study did not refute the finding that H. nana may be a cryptic species that is becoming host adapted. It simply did not provide additional data to that already obtained. A DNA fingerprinting tool, PCR-RFLP, of the ribosomal intergenic spacer (IGS), was developed in this study in order to evaluate its usefulness in tracing particular genotypes within a community, thus determining transmission patterns of H. nana between rodent and human hosts. Analysis of the IGS of numerous H. nana isolates by PCR-RFLP identified the presence of copies of the IGS that, whilst similar in length, differed in their sequence. Similar to that observed in the ITS1, the existence of different IGS copies was found in both rodent and human isolates of H. nana, thus the variability was not evidence of the existence of a rodent- or humanspecific genotype. Evaluation of the intergenic spacer (IGS) as a fingerprinting tool suggests that this region of DNA is too variable within individuals and thus, cannot be effectively used for the study of transmission patterns of the tapeworm H. nana between different hosts. In summary, it appears that the life cycle of H. nana that exists in remote communities in the north-west of Western Australia is likely to involve mainly human to human transmission. This is supported by both the biological and genetic data obtained for the mitochondrial locus in this study. The role of the intermediate hosts, such as Tribolium spp., in the Hymenolepis life cycle is still unclear, however it would appear that it may be greatly reduced in the transmission of this parasite in remote Australian communities. In the future, it is recommended that further genetic characterisation of faster evolving mitochondrial genes, and/or suitable nuclear genes be characterised in a larger number of isolates of H. nana. The use of techniques which can combine the characterisation of genotype and phenotype, such as proteomics, may also be highly valuable for studies on H. nana from different hosts.

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4

Macnish, Marion. "Characterisation of community-derived Hymenolepis infections in Australia." Macnish, Marion (2001) Characterisation of community-derived Hymenolepis infections in Australia. PhD thesis, Murdoch University, 2001. http://researchrepository.murdoch.edu.au/176/.

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Hymenolepis nana is a ubiquitous parasite, found throughout many developing and developed countries. Globally, the prevalence of H. nana is alarmingly high, with estimates of up to 75 million people infected. In Australia, the rates of infection have increased substantially in the last decade, from less than 20% in the early 1990's to 55 - 60% in these same communities today. Our knowledge of the epidemiology of infection of H. nana is hampered by the confusion surrounding the host specificity and taxonomy of this parasite. The suggestion of the existence of two separate species, Hymenolepis nana von Siebold 1852 and Hymenolepis fraterna Stiles 1906, was first proposed at the beginning of the 20th century. Despite ongoing discussions in the subsequent years it remained unclear, some 90 years later, whether there were two distinct species, that are highly host specific, or whether they were simply the same species present in both rodent and human hosts. The ongoing controversy surrounding the taxonomy of H. nana has not yet been resolved and remains a point of difference between the taxonomic and medical literature. The epidemiology of infection with H. nana in Australian communities is not well understood as the species present in these communities has never been identified with certainty. It is not clear which form of transmission commonly occurs in Australia, whether the H. nana 'strain/species' present in the north-west of Western Australia is present in human and rodent hosts, or whether humans harbour their own 'strain/sub-species' of Hymenolepis. Furthermore, it is not known whether mice are a potential zoonotic source for transmission of Hymenolepis to human hosts. In this study, 51 human isolates of H. nana were inoculated into highly susceptible laboratory rodent species. However, these failed to develop into adult worms in all instances, including when rodent species were chemically and genetically immunosuppressed. In addition, 24 of these human isolates were also cross-tested in the flour beetle intermediate host, Tribolium confusum. Of these, only one isolate developed to the cysticercoid stage in beetles, yet when inoculated into laboratory rodents, the cysticercoids also failed to develop into adult stage. Since isolates of H. nana infecting humans and rodents are morphologically indistinguishable, the only way they can be reliably identified is by comparing the parasite in each host using molecular criteria. In the current study, three regions of ribosomal DNA, the small subunit (18S), the first internal transcribed spacer (ITS1) and the intergenic spacer (IGS) were chosen for genetic characterisation of Hymenolepis spp. from rodent and human hosts from a broad geographic range. In addition, a mitochondrial gene, the cytochrome c oxidase subunit 1 (C01) gene and a non-ribosomal nuclear gene, paramyosin, were characterised in a number of Hymenolepis isolates from different hosts. A small PCR fragment of 369 bp, plus a larger fragment of 1223 bp, were sequenced from the 18S gene of reference isolates of H. nana and the rat tapeworm H. diminuta. Minimal sequence variation was found in the two regions of the 18S between these two morphologically distinct, phylogenetically recognised species, H. nana and H. diminuta, and this indicated that the 18S gene was too conserved for further genetic characterisation of isolates of H. nana from different hosts. A large number of human isolates of H. nana (104) were characterised at the ITS1 using PCRrestriction length fragment polymorphism (PCR-RFLP). The profiles obtained were highly variable and often exceeded the original size of the uncut fragment. This was highly suggestive of the existence of ribosomal spacers that, whilst identical in length, were highly variable in sequence. To overcome the problems of the variable PCR-RFLP profiles, further characterisation of the ITS1, by cloning and sequencing 23 isolates of H. nana, was conducted and this confirmed the existence of spacers which, although similar in length (approximately 646 bp), differed in their primary sequences. The sequence differences led to the separation of the isolates into two clusters when analysed phylogenetically. This sequence variation was not, however, related to the host of origin of the isolate, thus was not a marker of genetic distinction between H. nana from rodents and humans. Indeed, the levels of variability were often higher within an individual isolate than between isolates, regardless of whether they were collected from human or mice hosts, which was problematic for phylogenetic analysis. In addition, mixed parasite infections of H. nana and the rodent tapeworm H. microstoma were identified in four humans in this study, which was unexpected and surprising, as there have been no previous reports in the literature documenting humans as definitive hosts for this parasite. Further studies are required, however, to determine if the detection of H. microstoma in humans reflects a genuine, patent infection or an atypical, accidental occurrence. Sequencing of the mitochondrial cytochrome c oxidase 1 gene (C01) in a number of isolates of Hymenolepis nana from rodents and humans identified a phylogenetically supported genetic divergence of approximately 5% between some mouse isolates compared to isolates of H. nana from humans. This provided evidence that the mitochondrial C01 gene was useful for identifying genetic divergences in H. nana that were not resolvable using nuclear loci. Despite a morphological identity between isolates of H. nana from rodent and human hosts, the genetic divergence observed between isolates at the mitochondrial locus was highly suggestive that H. nana is a species complex, or 'cryptic' species (= morphologically identical yet genetically distinct). In addition, whilst not supported by high bootstrap values, a clustering of the Australian human isolates into one uniform genetic group that was phylogenetically separated from all the mouse isolates was well supported by biological data obtained in this study. To confirm the phylogeny of the C01 tree a small segment of the nuclear gene, paramyosin, was sequenced in a number of isolates from humans and rodents. However, this gene did not provide the level of heterogeneity required to distinguish between isolates from rodent and human hosts. The high sequence conservation of the paramyosin gene characterised in this study did not refute the finding that H. nana may be a cryptic species that is becoming host adapted. It simply did not provide additional data to that already obtained. A DNA fingerprinting tool, PCR-RFLP, of the ribosomal intergenic spacer (IGS), was developed in this study in order to evaluate its usefulness in tracing particular genotypes within a community, thus determining transmission patterns of H. nana between rodent and human hosts. Analysis of the IGS of numerous H. nana isolates by PCR-RFLP identified the presence of copies of the IGS that, whilst similar in length, differed in their sequence. Similar to that observed in the ITS1, the existence of different IGS copies was found in both rodent and human isolates of H. nana, thus the variability was not evidence of the existence of a rodent- or humanspecific genotype. Evaluation of the intergenic spacer (IGS) as a fingerprinting tool suggests that this region of DNA is too variable within individuals and thus, cannot be effectively used for the study of transmission patterns of the tapeworm H. nana between different hosts. In summary, it appears that the life cycle of H. nana that exists in remote communities in the north-west of Western Australia is likely to involve mainly 'human to human' transmission. This is supported by both the biological and genetic data obtained for the mitochondrial locus in this study. The role of the intermediate hosts, such as Tribolium spp., in the Hymenolepis life cycle is still unclear, however it would appear that it may be greatly reduced in the transmission of this parasite in remote Australian communities. In the future, it is recommended that further genetic characterisation of faster evolving mitochondrial genes, and/or suitable nuclear genes be characterised in a larger number of isolates of H. nana. The use of techniques which can combine the characterisation of genotype and phenotype, such as proteomics, may also be highly valuable for studies on H. nana from different hosts.

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5

Eastlake, Jane Louise. "Calmodulin from the eucestoda Hymenolepis diminuta : an investigative study." Thesis, University of Bath, 1994. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.387426.

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6

Hipkiss, J. B. "Studies on the cestocidal effects of trifluoperazine on Hymenolepis diminuta." Thesis, Oxford Brookes University, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.372841.

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7

Jimenez-Guerra, Francisco. "Prevalence of, and risk factors for, Helicobacter pylori infection and its effect on growth of children in Mexico." Thesis, London School of Hygiene and Tropical Medicine (University of London), 1999. http://researchonline.lshtm.ac.uk/4649359/.

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Helicobacter pylori (H. pylori) infection causes achlorydria, depressed gastric acid barrier, impaired immune response and is suspected in bacterial overgrowth and diarrhoea. These features of the infection are known to cause significant malabsorption of nutrients and impairment of linear growth in children. The prevalence of H. pylori infection in children is known to be much higher in developing countries, especially among the lower socio-economic groups. The true prevalence of infection in urban children in Mexico and its impact on their growth are largely unknown. This study examined the prevalence of H. pylori infection in school children from an urban area in Northwest Mexico and attempted to identify the risk factors that predispose individuals to infection in childhood; as well as to relate the presence of this infection to growth of children. The cross-sectional study was conducted in 1997/98 in the poorest socio-economic sectors of the city of Hermosillo, Sonora, among 178 children aged 9 and 10 years. H. pylori status was determined in children by the 13C-urea breath test. Anthropometric (weight and height) and haemoglobin measurements along with analysis of faecal samples and a 24-hour dietary recall were carried out in each child. Family sociodemographic/socio-economic status and living conditions data were elicited from parents by interview via structured questionnaires. The overall prevalence rate of H. pylori infection for the children in Hermosillo as determined by this study was 47.1%. The findings indicate that rural-born father, number of siblings, the type of main water supply (one tap in the yard) and the sharing of bed by the study child are important risk factors for acquiring the H. pylori infection. A borderline significant but small effect of H. pylori infection on height for-age was observed in this study. H. pylori infection was found to be positively highly associated with Hymenolepis nana. No differences in mean energy, protein and iron intakes between H. pylori positive and negative children were observed. However, significant differences in the mean energy, protein and iron intakes were observed between boys and girls. H. pylori infection and enteric parasites were not significantly correlated with the presence of anaemia.

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8

Sampaio, Arthur Vinicius. "Apoptosis in development and sexual maturation of the tapeworm Hymenolepis diminuta." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape7/PQDD_0001/MQ42097.pdf.

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9

Henderson, David John. "Studies on cellular differentiation in the dwarf tapeworm Hymenolepis nana (Cestoda: Cyclophyllidea)." Thesis, Queen's University Belfast, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.329352.

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10

Sloup, Vladislav. "Vliv tasemnice (Hymenolepis diminuta) na bioakumulaci zinku v těle hostitele (Rattus norvegicus)." Doctoral thesis, Česká zemědělská univerzita v Praze, 2016. http://www.nusl.cz/ntk/nusl-259687.

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This research investigates the ability of rat tapeworm (Hymenolepis diminuta) to accumulate zinc in tissue and the influence of its intake and excretion by its host (laboratory rat). The host was fed by food with zinc in two forms: 1) a mixture of standard food ST1 with hyperaccumulator plant Arabidopsis halleri, 2) ST1 mixture with zinc lactate, which is ordinarily used as a feed supplement for increasing zinc content and it is often included in human diet supplements. Rat control group fed by ST1 only was included in the experiment for verification of the difference. Rats were divided to six groups (OO, OT, RT, RO, MO a MT). Three rat groups were infected by rat tapeworm (OT, RT, MT) and three rat groups were not infected (OO, RO, MO). The control groups OO and OT were fed by ST1 only. RO and RT groups were fed by ST1 with admixture of Arabidopsis halleri and groups MO and MT were fed by ST1 with zinc lactate. Urine and excrements of the rats were collected twice a week during the experiment and their amounts were measured every day. The rats were weighted every week. At the end of the balance phase of the experiment rats were euthanized and seven selected tissues were removed (liver, kidney, spleen, small intestine, testis, muscle and bone). Rat tapeworm was removed from the infected rats. Blood was drawn from the rats. The results show that rat groups infected by the rat tapeworm had lower concentration of zinc in almost all analyzed tissues except for spleen, where the concentration of zinc was the same as in groups without the rat tapeworm. Based on the results the rat tapeworm also has an influence on the excretion of feces and urine.

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Books on the topic "Hymenolepis"

1

Quezada, Rafael. Hymenolepis nana. Guatemala: [s.n.], 1995.

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2

Lloyd, Sheelagh. Other adult and larval cestodes. Oxford University Press, 2011. http://dx.doi.org/10.1093/med/9780198570028.003.0059.

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Adult Diphyllobothrium latum is acquired by consumption of raw fish by persons living around lakes/reservoirs/rivers. Hymenolepis nana can have a direct life cycle so eggs produced by adults in man are important in transfer between humans. The contribution of rodents and the indirect life cycle through arthropods need re-evaluation. Other minor adult cestode infections are described.Man can be an intermediate host for tissue metacestodes. Taenia multiceps and related species are that acquired from canids and produce a coenurus. Spirometra spp. pleurocercoids are acquired from copepod or reptile/amphibian/mammalian intermediate hosts. Other metacestode infections are very rare.

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Book chapters on the topic "Hymenolepis"

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Mane, Pratibha, and Dongyou Liu. "Hymenolepis." In Handbook of Foodborne Diseases, 703–8. Boca Raton : Taylor & Francis, [2019] | Series: Food microbiology series | “A CRC title, part of the Taylor & Francis imprint, a member of the Taylor & Francis Group, the academic division of T&F Informa plc.”: CRC Press, 2018. http://dx.doi.org/10.1201/b22030-63.

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Kern, Peter. "Hymenolepis." In Lexikon der Infektionskrankheiten des Menschen, 429–31. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-39026-8_505.

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Ringelmann, R., and Beate Heym. "Hymenolepis nana." In Parasiten des Menschen, 156–57. Heidelberg: Steinkopff, 1991. http://dx.doi.org/10.1007/978-3-642-85397-5_49.

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Mehlhorn, Heinz. "Hymenolepis diminuta." In Encyclopedia of Parasitology, 1309. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-43978-4_1534.

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Mehlhorn, Heinz. "Hymenolepis microstoma." In Encyclopedia of Parasitology, 1310. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-43978-4_1535.

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Mehlhorn, Heinz. "Hymenolepis minutissima." In Encyclopedia of Parasitology, 1310. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-43978-4_4696.

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Mehlhorn, Heinz. "Hymenolepis diminuta." In Encyclopedia of Parasitology, 1–2. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-642-27769-6_1534-2.

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Mehlhorn, Heinz. "Hymenolepis microstoma." In Encyclopedia of Parasitology, 1–2. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-642-27769-6_1535-2.

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Mehlhorn, Heinz. "Hymenolepis minutissima." In Encyclopedia of Parasitology, 1. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-642-27769-6_4696-1.

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Mehlhorn, Heinz. "Hymenolepis lanceolata (syn. Drepanitotaenia)." In Encyclopedia of Parasitology, 1310. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-43978-4_3955.

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Conference papers on the topic "Hymenolepis"

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Moreira, Joselia Cristina de Oliveira, Clarice Yukari Minagawa Issei, Euma da Cunha Ramos Silva, Jhenifer Alves Camargo, Joana Letícia Lacerda, Silvio Rogério Cardoso dos Santos, and Daniele Masselli Rodrigues Demolin. "Monitoramento sanitário de Hymenolepis Nana pelo laboratório de controle de qualidade sanitária e animal (LCQSA) do CEMIB." In Simpósio de Profissionais da UNICAMP. Universidade Estadual de Campinas, 2019. http://dx.doi.org/10.20396/sinteses.v0i7.10246.

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Tresnani, Galuh, I. Wayan Suana, and Islamul Hadi. "The detection of Hymenolepis sp. from house rats (Rattus rattus diardii Jentink, 1880) in Mataram through ITS-1 gene PCR analysis." In TOWARDS THE SUSTAINABLE USE OF BIODIVERSITY IN A CHANGING ENVIRONMENT: FROM BASIC TO APPLIED RESEARCH: Proceeding of the 4th International Conference on Biological Science. Author(s), 2016. http://dx.doi.org/10.1063/1.4953497.

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SILVA, VINICIUS SAMUEL PEREIRA, WELLINGTON PEREIRA SILVA, and MARCELO A. RUAS. "INCIDÊNCIA DE ENTEROPARASITOSES EM ALUNOS DE 07 A 11 ANOS DE UMA ESCOLA ESTADUAL SITUADA NO BAIRRO VILA ÁUREA NO MUNICÍPIO DE MONTES CLAROS - MG." In Brazilian Congress. brazco, 2020. http://dx.doi.org/10.51162/brc.health2020-00027.

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As enteroparasitoses representam um fator de grande relevancia no que se relaciona com a saude publica nos paises em desenvolvimento. Tendo como um dos principais fatores de contaminacao a exposicao e o convivio de pessoas em ambientes expostos a esgotos lancados a ceu aberto ou em rios urbanos. Motivo este que cominou na escolha da Escola Estadual Deputado Esteves Rodrigues do municipio de Montes Claros- MG, devido a falta de infraestrutura local: passagem de um corrego a ceu aberto contaminado com esgoto no fundo da escola e a precaria educacao sanitaria da comunidade local. O objetivo geral desse trabalho foi verificar qual as enteroparasitoses mais frequentes entre os alunos de 7 a 11 anos, dessa escola. Tendo como objetivos especificos, verificar as enteroparasitoses mais frequentes entre estes estudantes. A metodologia utilizada foi baseada na analise parasitologica de Hoffman, Pons, Janer, aplicada em um total de 75 amostras, seguido por uma discursao tecnica do resultados obtidos. Ao final, foi concluido um taxa de contaminacao de 33% das amostras, onde 6% apresentavam Strongyloides stercoralis, 3% Hymenolepis nana, 3% Endolimax nana, 44% Giardia lamblia, 19% Entamoeba histolytica e 25% Entamoeba coli. Ocorrendo 64% dos casos de monoparasitismo, 24% dos casos de biparasitismos, 12% dos casos de triparasitismo , demonstrando que apesar dos fatores adversos, apenas 25 criancas apresentavam algum tipo de contaminacao. ,

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Alves, Nayara Nágila Neves, Taiane Nunes Magalhães, Yara Raphaela Maia dos Santos, Rebeka Alves Ramos, and Elieth Afonso de Mesquita. "PREVALÊNCIA DE ENTEROPARASITOS INTESTINAIS EM ESPAÇO PÚBLICO DESTINADO AO LAZER, ESPORTE E TURISMO EM PORTO VELHO/RO." In I Congresso Brasileiro de Parasitologia Humana On-line. Revista Multidisciplinar em Saúde, 2021. http://dx.doi.org/10.51161/rems/724.

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Introdução: Alguns parasitos intestinais são comuns em animais domésticos (cães e gatos) os quais podem contaminar o meio ambiente e os seres humanos, constituindo um grave problema de saúde pública. Estima-se que 300 milhões de pessoas são infectadas anualmente por geo-helmintos, na qual 50% são crianças em idade escolar. Dentre as espécies de helmintos com potencial zoonótico, encontram-se os agentes etiológicos da ascaridíase, teníase e ancilostomíases. Apesar de Porto Velho possuir fatores socioeconômicos e ambientais favoráveis à manutenção desses parasitas, há escassez de dados recentes na literatura sobre sua situação epidemiológica. Objetivo: Identificar e caracterizar a prevalência de helmintos presentes no solo arenoso do espaço público destinado ao lazer, esportes e turismo em Porto Velho, Rondônia. Material e métodos: O estudo é de natureza básica, descritivo e de caráter experimental com abordagem quali-quantitativa. As coletas realizadas em períodos diurnos e noturnos foram oriundas do espaço arenoso público utilizado para a prática de atividade física, esportiva e recreativa. Cerca de 40g de areia foi coletada e armazenada em recipiente fechado estéril para transporte ao local de análise, Laboratório de Histoanálise na Universidade Federal de Rondônia. As análises parasitológicas foram realizadas a partir das técnicas de EPF Holffman (sedimentação) e Willins (flutuação), buscando contemplar a identificação de ovos leves e pesados, além de cistos e larvas. Resultados: A partir das análises morfológicas por microscopia, aumento de 400-1000x, foi possível identificar a presença de helmintos (Trichuris sp., Áscaris, Hymenolepis sp. e Schistosoma), protozoários (Entamoeba sp.) e fungos (diversas espécies), assim como a presença de larvas filarióide sp. Os helmintos mais frequentes foram Trichuris e Áscaris. Conclusão: O local analisado encontra-se com elevada comunidade parasitária, apresentando risco à saúde humana por conter agentes causadores de doenças intestinais responsáveis por alto índice de mortalidade infantil. Verifica-se a necessidade de maior fiscalização sanitária e regulamentações para lazer com animais, os quais são vetores de zoonoses. Resíduos alimentares no local também tornam o ambiente propício a aves e roedores, transmissores de doenças fúngicas e bacterianas, que podem ser letal ao ser humano.

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Lazzarotto, Eduardo Luís, Felipe Rhuan Gobi, Kawan Gabriel da Silva, and Fernanda Mauer D'Agostini. "A INFLUÊNCIA DAS PARASITOSES INTESTINAIS SOBRE A SUPRESSÃO DA RESPOSTA PRÓ-INFLAMATÓRIA EM PACIENTES COM ARTRITE REUMATOIDE." In I Congresso Brasileiro de Parasitologia Humana On-line. Revista Multidisciplinar em Saúde, 2021. http://dx.doi.org/10.51161/rems/701.

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Introdução: A artrite reumatoide (AR) é uma doença autoimune de caráter inflamatório e crônico caracterizada por uma sinovite crônica e simétrica, que leva a erosão do osso e cartilagem. Objetivo: Relacionar a resposta inflamatória de AR e a influência das parasitoses intestinais. Metodologia: Revisão bibliográfica de artigos disponibilizados nas plataformas Scielo, Pubmed e Scientific Research Publising, nas línguas portuguesa e inglesa, datados entre 2008 a 2019, com os seguintes descritores: artrite reumatoide parasitoses intestinais, enteroparasitoses pacientes com AR, influência das parasitoses intestinais em pacientes com AR. Resultados: A membrana sinovial é considerada o tecido no qual se inicia e se mantém o processo inflamatório na AR. Atualmente, a causa de AR é a desregulação da produção de interleucina (IL)‐ 17, responsável pela ativação das células T e B, bem como dos macrófagos, que liberam citocinas como IL‐ 1 , IL‐ 6 e fator de necrose tumoral (TNF‐ α). Estudos indicam que helmintos podem modular a resposta imune proporcionando um ambiente anti-inflamatório que ajude sua sobrevivência no hospedeiro, anulando respostas imunes pró-inflamatórias, suprimem respostas dos linfócitos Th-1 e Th-17, além de estimular o desenvolvimento de respostas dos linfócitos Th-2, importantes nas doenças reumáticas autoimunes, como AR, pois a infecção de helmintos contribui para o alívio dos sintomas. Estudos indicam que Schistosoma mansoni, Schistosoma japonicum, Ascaris suum, Heligmosomoides polygyrus bakeri e Hymenolepsis diminuta são parasitas que possuem efeito protetor no processo inflamatório são. Um estudo, o qual fez uso de administração de um extrato de Ascaris suum na artrite experimental induzida por colágeno e por zimosan em ratos e camundongos, assinalou melhoria clínica e estrutural nas duas tipologias, reduzindo a liberação de mediadores inflamatórios como o NO, IL-1 β e IL-10. O efeito benéfico ocorreu a nível funcional e estrutural, abrangendo hiperalgesia articular, redução de danos da cartilagem articular, prevenção da perda de glicosaminoglicanos e revogação da sinovite crônica com redução de macrófagos e linfócitos. Conclusão: A produção de um ambiente imunologicamente controlado como resultado da infecção por helmintos pode diminuir a severidade de uma doença reumática simultânea. Helmintos influenciam beneficamente na resposta inflamatória, podendo auxiliar no tratamento de doenças autoimunes como a AR.

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