Relevant bibliographies by topics / Leeches

Academic literature on the topic 'Leeches'

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Published: 4 June 2021
Last updated: 30 July 2024

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Journal articles on the topic "Leeches"

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C.R, Swathy, P. K. V. Anand, and Rahul H. "Leech Farming: An Overview Over Leech Breeding and Multiplication." International Research Journal of Ayurveda & Yoga 06, no. 07 (2023): 63–66. http://dx.doi.org/10.47223/irjay.2023.6709.

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Introduction: There are various descriptions regarding blood letting or Raktamoksha using leeches (Jaloukavacharana) in ayurvedic classics. Acharya Susruta considers Rakta as the fourth Dosha and mentions Raktamoksha as a Shodhana karma (purificatory therapy) and is indicated in many diseases with vitiation of Raktha. As a matter of time, leech therapy is becoming more popular due to its benefits but there is no known established reliable suppliers of leeches for medical needs especially for medal purpose, maintenance of leeches in adequate environment, reproduction of leeches and storage of leeches on a large scale. Materials and Methods: This study is based on analysis of classical ayurvedic texts, modern books and internet sources. Some help was also been taken from previous articles published on the same topic. All the relevant information are compiled here. Result: Parameters for successful leech farming are studied and application of these facts can improve leech farming and thus ensure increased availability of leeches for medical needs. Discussion: The increased demand of leeches and its lesser availability forms a challenge especially in extreme weather. Basically, leech farming is a research topic and also an innovative idea for ayurvedic scholars. Leech farming provides special knowledge regarding selection and breeding of leeches
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MISHRA, DEVENDRA P. "A Conceptual View of Poisonous and Non-Poisonous Leeches in Ayurveda." Dev Sanskriti Interdisciplinary International Journal 5 (January 15, 2015): 55–59. http://dx.doi.org/10.36018/dsiij.v5i0.57.

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Leeches are being used by of human kind for centuries for treating many disorders. Though it is very useful tool and is propagating throughout the world as a special medical device, side effects of leech bites in some cases have been found from time to time. It is because of improper knowledge of non-poisonous and poisonous leeches. Sushruta’s classification shows us the passage to the proper use of leeches for leech therapy. In this study, Sushruta’s classification of leeches was compared and paired with that of phylum Annelida and was found effective in scientifically differentiating between non-poisonous and poisonous leeches.
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Dubey, Anubhav, Mamta Kumari, and Ghosh Niladry. "Anti-leech activity of asparagus racemosus and anogeissus latifolia roxb extracts against Piscicola Geometra." IP International Journal of Comprehensive and Advanced Pharmacology 9, no. 2 (June 15, 2024): 125–29. http://dx.doi.org/10.18231/j.ijcaap.2024.018.

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Piscicola geometra leeches are naturally parasitizing Cobia juveniles. The leeches adhere to cobia by suctioning and biting its surface, thereby facilitating the entry of a secondary infection. The anti-leech action An in vitro technique investigated the anti-leech action against Piscicola geometra using water extracts of Asparagus racemosus seeds and Anogeissus latifolia roxb leaves, preparing a grand total of 800 afflicted cobia leeches. We compared the anti-leech activity of water extracts from Asparagus racemosus seeds and Anogeissus latifolia leaves. We diluted the plant extracts to various concentrations and observed the activity over a duration of 96 hours. The seeds and leaves of Asparagus racemosus exhibited significant anti-leech activity, resulting in 80% of the leeches dying. Anogeissus latifolia leaves exhibited a greater degree of anti-leech action, resulting in the complete killing of leeches. The average duration required for Anogeissus latifolia leaves to immobilise and eliminate the leeches ranged from 8 hours to 96 hours, depending on the different concentrations of Anogeissus latifolia leaves used. This research has shown that the aqueous extract of Anogeissus latifolia leaves has strong potential as a novel anti-leech agent.
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Sudeepa, Gururaj D., and Sneha A. "A Survey Study on Leech Storage Practices in Ayurveda Hospitals." Journal of Ayurveda and Integrated Medical Sciences 7, no. 3 (June 10, 2022): 17–22. http://dx.doi.org/10.21760/jaims.7.3.3.

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Leech therapy is one of the popular treatment method adopted in Ayurveda hospitals. We have conducted a survey study to evaluate the method of collection; storage and maintenance of leeches. Data regarding the leech storage were collected from 31 Ayurveda hospitals, on the basis of a standardized questionnaire. All the responding hospitals practiced leech therapy, mostly with a storage setup in the minor OT. 68% procured leeches during rainy season from the leech suppliers. 42% responders used tap water and plastic jars for storage. 94% of Ayurveda hospitals did not subject the water used for storage of medicinal leeches for physiochemical and microbial parameters periodically. There is a need for breeding centers in order to supply of medicinal leeches throughout the year. There is a need for establishing national guidelines for good storage and maintenance of medicinal leeches in India.
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Arabacı, Büşra. "‘Pearls’ of the nineteenth-century: from therapeutic actors to global commodities medicinal leeches in the Ottoman Empire." Medical History 67, no. 2 (April 2023): 128–47. http://dx.doi.org/10.1017/mdh.2023.17.

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AbstractNineteenth-century physicians increasingly favoured leeching – the placing of a live leech onto a patient’s skin to stimulate or limit blood flow – as a cure for numerous ailments. As conviction in their therapeutic properties spread, leech therapy dominated European medicine; France imported over fifty million leeches in one year. Demand soon outpaced supply, spawning a lucrative global trade. Over-collection and farming eventually destroyed leech habitats, wreaked environmental havoc and forced European merchants to seek new supply sources. Vast colonies of leeches were found to inhabit the immense wetlands of the Ottoman Empire, which soon became a major exporter of medicinal leeches. Following the Treaty of Balta Liman (1838), the Ottoman state moved to exert control over the lucrative trade, imposing a tax on leech gathering and contracting with tax-farmers (mültezim) to collect the taxes. British diplomats, merchants and other stakeholders protested the imposition of the tax, as had previously happened with the commodification of wildlife; their pursuit of profit led collectors and farmers to over-gather leeches, with catastrophic consequences. By the end of the century, so great had their worth climbed that the leech population faced extinction. This paper situates medicinal leeches as therapeutic actors of history and adopts an interscale approach in formulating the human-leech interaction. It offers a substantive contribution to the history of medicine, in revealing the centrality of leeches to the rise of modern medicine and global trade, but also by making visible their role in shaping imperial diplomacy and worldwide economic markets.
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Trontelj, Peter, and Patricija Podkrajšek. "new checklist of Slovenian leeches (Clitellata: Hirudinea: Euhirudinea): In memory of Boris Sket (1936–2023)." Natura Sloveniae 25, no. 2 (December 30, 2023): 15–25. http://dx.doi.org/10.14720/ns.25.2.15-25.

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The new (as of 2023) checklist of Slovenian leeches (Euhirudinea) contains 33 species, which represents a 44% increase since the last published inventory in 2003. Notable new entries include Placobdella costata found parasitizing on European pond turtles, the marine fish leech Trachelobdella lubrica from the Slovenian Adriatic coast, the semi-terrestrial Haemopis elegans, the terrestrial Xerobdella praealpina – making Slovenia possibly the only country with confirmed occurrence of all three European land leeches – and a new, still undescribed highly troglomorphic cave leech from a deep Dinaric cave. The number of freshwater fish leeches is underwhelmingly low: two. This, and several unresolved taxonomic questions in erpobdellids suggest that more faunistic and taxonomic work is needed and that the list of Slovenian leech species is far from concluded. The authors dedicate this contribution to their teacher, Prof. Boris Sket (1936–2023), a leading figure in biodiversity research in the Dinaric Karst, including leeches and cave life.
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Azmey, Syakirah, Hussein Taha, Gunanti Mahasri, Muhamad Amin, Ahasan Habib, Min Pau Tan, and Takaomi Arai. "Population Genetic Structure of Marine Leech, Pterobdella arugamensis in Indo-West Pacific Region." Genes 13, no. 6 (May 26, 2022): 956. http://dx.doi.org/10.3390/genes13060956.

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Grouper aquaculture is rapidly expanding in both tropical and subtropical regions. The presence of marine leeches (Pterobdella arugamensis; previously named Zeylanicobdella arugamensis) infesting cultured groupers, however, can have a fatal effect on grouper aquaculture production and cause significant economic loss. Understanding the marine leech’s population structure is therefore important to determine its possible distributional origin and distributional mechanisms, which will help monitor and mitigate the infestation. In this study, a total of 84 marine leeches collected from cultured hybrid groupers Epinephelus spp. in Brunei Darussalam, Malaysia and Indonesia were identified as P. arugamensis, based on morphological and mitochondrial cytochrome c oxidase subunit I gene sequence analyses. These leech samples, together with additional sequences from the GenBank database, were grouped into four genetically distinct haplogroups: (1) Asia Pacific, (2) Borneo, (3) Surabaya and (4) Iran. The four populations were found to be highly diverged from each other. The results also suggested that the samples from the Asia Pacific population could be dispersed and transported from Indonesia.
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Koo, Kyo Soung, Kayoung Yun, and Yikweon Jang. "Ozobranchus jantseanus (Clitellata: Ozobranchidae) from Reeve’s Turtle, Mauremys reevesii: New Annelid Fauna in Korea." Korean Journal of Parasitology 60, no. 3 (June 30, 2022): 213–15. http://dx.doi.org/10.3347/kjp.2022.60.3.213.

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Turtle leeches have not been recorded in Korea, although they occur in geographically adjacent countries including China and Japan. This study describes a turtle leech, <i>Ozobranchus jantseanus</i> (Clitellata: Ozobranchidae), found from Reeve’s turtle (Mauremys reevesii) in Korea. Of the 143 Reeve’s turtles collected from the freshwater reservoir in Jinju City, Gyeongsangnam-do, Korea, 95 unidentified leeches were found in 8 (5.6%) individuals. The leeches had 22 somites with 11 pairs of externally exposed branchiae, body-sized posterior suckers, and spines on the dorsal surface. We identified these leeches as <i>Ozobranchus jantseanus</i> Oka, 1912 (Clitellata: Ozobranchidae). This species of turtle leeches found in Korea may fill the gap in the biodiversity of East Asian annulus.
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Mumcuoglu, Kosta Y. "Recommendations for the Use of Leeches in Reconstructive Plastic Surgery." Evidence-Based Complementary and Alternative Medicine 2014 (2014): 1–7. http://dx.doi.org/10.1155/2014/205929.

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A written informed consent should be obtained from the patient before hirudotherapy is initiated. The patients should be treated each day of leech therapy with anti-Aeromonasantibiotics. Leeches should be applied on the darker spots of the reattached body parts or flaps. Usually 1–10 leeches are used for each treatment, while at the beginning, the patient might need two or more treatments per day. Leech therapy is used until venous capillary return is established across the wound border by angiogenesis. Usually the treatment with leeches lasts for 2–6 days. Hematologic evaluations should be performed every 4 hrs and the patient has to receive blood transfusions when the hemoglobin level is lower than 8 g/dL. Signs of regional lymphadenitis, slight swelling, and pain of regional lymph nodes on the side of leech application and subfebrile temperature can occur. Contraindications related to hirudotherapy include arterial insufficiency, hemophilia, hemorrhagic diathesis, hematological malignancies, anemia, hypotension, and sepsis. Leech therapy is not recommended in pregnancy and lactation and in patients with an unstable medical status, history of allergy to leeches or severe allergic diathesis, and disposition to keloid scar formation, as well as in those using anticoagulants and immunosuppressants.
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Nazarova, Anna, Andrei Mutin, Denis Skafar, Nadezhda Bolbat, Sofya Sedova, Polina Chupalova, Vasiliy Pomazkin, Polina Drozdova, Anton Gurkov, and Maxim Timofeyev. "Leeches Baicalobdella torquata feed on hemolymph but have a low effect on the cellular immune response of amphipod Eulimnogammarus verrucosus from Lake Baikal." PeerJ 12 (May 17, 2024): e17348. http://dx.doi.org/10.7717/peerj.17348.

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Lake Baikal is one of the largest and oldest freshwater reservoirs on the planet with a huge endemic diversity of amphipods (Amphipoda, Crustacea). These crustaceans have various symbiotic relationships, including the rarely described phenomenon of leech parasitism on amphipods. It is known that leeches feeding on hemolymph of crustacean hosts can influence their physiology, especially under stressful conditions. Here we show that leeches Baicalobdella torquata (Grube, 1871) found on gills of Eulimnogammarus verrucosus (Gerstfeldt, 1858), one of the most abundant amphipods in the Baikal littoral zone, indeed feed on the hemolymph of their host. However, the leech infection had no effect on immune parameters such as hemocyte concentration or phenoloxidase activity and also did not affect glycogen content. The intensity of hemocyte reaction to foreign bodies in a primary culture was identical between leech-free and leech-infected animals. Artificial infection with leeches also had only a subtle effect on the course of a model microbial infection in terms of hemocyte concentration and composition. Despite we cannot fully exclude deleterious effects of the parasites, our study indicates a low influence of a few leeches on E. verrucosus and shows that leech-infected amphipods can be used at least for some types of ecophysiological experiments.
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Dissertations / Theses on the topic "Leeches"

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Martin, A. J. "Lake-dwelling leeches : coexistance and population regulation." Thesis, University of Liverpool, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.317192.

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Seaby, Richard M. H. "Coexistence of lake-dwelling triclads and leeches." Thesis, University of Liverpool, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.317274.

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Procter, R. M. "The feeding ecology of three species of lake-dwelling leeches." Thesis, University of Liverpool, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.380088.

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Reese, David R. "Neuropilar synaptogenesis between identified central neurons in vivo." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape10/PQDD_0007/MQ44256.pdf.

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Merz, David C. (David Christian). "Synapse formation between identified leech neurons." Thesis, McGill University, 1994. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=28848.

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The formation of patterns of functionally appropriate chemical synapses is one of the key aspects of nervous system development. I have investigated the cellular interactions that culminate in the formation of an inhibitory synapse between the R and P neurons of the leech. These neurons may be isolated and maintained in culture, where they reform synaptic connections under easily manipulable conditions. An early event in the formation of this synapse is the loss from sites of contact in the postsynaptic P cell of an excitatory response to the transmitter serotonin. The loss of this response was triggered specifically by contact with the presynaptic R neuron, and not by contact with other leech neurons, including other serotonergic neurons. Furthermore, contact with the R neurons of the reproductive ganglia, which do not innervate P cells, was also ineffective in causing the loss of response. This highly specific cellular interaction was prevented by treatment of the R cell surface with the proteolytic enzyme trypsin or with the lectin wheat germ agglutinin (WGA), suggesting involvement of an R cell surface glycoprotein. WGA blocked not only the loss of the excitatory response, but also prevented the formation of the R-P synapse. An antibody library against the R cell generated using a novel phage-display system produced antibodies which bound to subsets of leech neurons, including the R neurons, but none of these was specific for the R cells. I conclude that an early event in the formation of the R-P synapse is the recognition by the P cell of its correct synaptic partner through an R cell-specific surface molecule.
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Munro, Roger Cameron. "Anti - haemostatic properties of the Hirudinea." Thesis, Open University, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.317381.

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Jacob, Cristina. "Use of the bioconcentration capability of leeches to evaluate chlorophenol pollution." Thesis, University of British Columbia, 1986. http://hdl.handle.net/2429/26298.

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The objective of this research was to investigate the use of leeches as in situ monitors of the biological availability of chlorophenols and degree of contamination in the North Arm of the Fraser River Estuary, British Columbia, where chlorophenols are used as wood preservatives by several forest industry operations. The objective was accomplished by : 1) an integrated series of grab and continous samples to determine the spatial and temporal variability in chlorophenol contamination, 2) in situ and laboratory experiments to compare leech bioconcentration to water levels of pollutants and to determine environmental factors( temperature, pH, leech size) that regulate and affect bioassay interpretation. Grab samples were not representative of the average level of pollution in the river. High concentrations such as the one reported for Mitchell Island on October 4 (11 ppb TTCP and 2.25 ppb PCP) could give a false impression of the pollution level in the river. Also, plumes of high concentration of chlorophenols could be missed easily if the sampling time does not coincide with the pollutant discharge. High frequency( every 2 hours) automatic water sampling showed a high variability in chlorophenol contamination( 0.278 ppb to 3.678 ppb TTCP for the March 31- April 6 field experiment) which demonstrated . the sporadic nature of chlorophenol discharges. Changes in the river flow also affected the level andthe pattern of chlorophenol variation. A method capable of integrating concentration versus time seemed to be the only way to elucidate the irregular pattern of pollutant levels. Leeches were exposed to the contaminants by submersion in cages at various locations along the North Arm. On the basis of the levels of chlorophenols found in the leech, estimation of the average chlorophenol concentration in the water were made. Concentrations as high as 3.2 9 ug/g TTCP and 1.11 ug/g PCP were found in leeches exposed in the Mitchell Island area( TTCP and PCP were the only chlorophenols found in the area of study at any time during our sampling program carried out between August 1984 and September 1985). An average concentration higher than 2 ppb TTCP and 2 ppb PCP was estimated in the water for the duration of the leech exposure( 7 days) at that location using bioconcentration levels determined in the laboratory. Laboratory experiments showed that lower pH increased bioconcentration of chlorophenols. Higher bioconcentration factors were achieved at higher temperatures and regression equations( R= 0.96 to 0.99) were calculated for the five chlorophenols used in the experiments( 2,4-DCP; 2,4,5-TCP; 2,4,6-TCP; 2,3,4,6-TTCP and PCP). Temperature affected the time needed to achieve steady state which was 4 days at 4 C, 5 days at 12 C and 7+ days at 22 C. Four out of the five chlorophenols tested( 2,4-DCP exhibited different bioconcentration characteristics) were bioconcentrated to the same level by leeches, regardless of their Po/w values. This contradicted the linear, relationships established by various researchers between the bioconcentration factor and Po/w of various compounds including chlorinated phenols in other organisms. Recommendations for setting up a method to use leeches in a biomonitoring program of the chlorophenol pollution in the Fraser River Estuary are proposed from the results of this research. The cost of the analyses using a biomonitoring program could be an order of magnitude lower than an adequate water sampling program to assess the chlorophenol pollution level.
Applied Science, Faculty of
Civil Engineering, Department of
Graduate
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Hayes, Polly May. "Gnathiids, leeches and blood protozoans of marine fishes : morphological, pathological, developmental and molecular approaches." Thesis, Kingston University, 2007. http://eprints.kingston.ac.uk/20385/.

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Haematophagous, metazoan ectoparasites and protozoan blood parasites of intertidal fishes from Wales and South Africa formed the main focus of this study. The ectoparasites examined were largely juvenile isopods of the genus Gnathia, and specimens ofthe leech, Zeylanico~della arugamensis. These taxonomically distinct ectoparasites were suspected vectors of the blood protozoans, and the latter were mostly apicomple{(ans of the genus Haemogregarina and euglenozoans ofthe genus Trypanosoma. Knowledge of digestive tract anatomy in juvenile gnathiids is essential for assessing their role as potential vectors and this system was examined using histological, microscopical and computer-based techniques. Features that had been unreported, or insufficiently recorded, previously' included several structures within the dorsal afid ventral stomach chambers, a typhlosolelike formation in the anterior hindgut, haemozoin-like deposits in the digestive caeca of Gnathia africana and Gnathia pantherina, and an extensive gut flora. Connections between the stomach, anterior hindgut and digestive caeca were identified, salivary gland ducts were followed towards the mouthparts, and the digestive cycles of Gnathia maxillaris and G. africana juveniles were examined over a period of 30 days. The pathology associated with the attachment sites of G. africana and Gnathia sp A to teleosts, and with G. pantherina to an elasmobranch, was found to be considerable in the case of G. pantherina, while Gnathia sp A prompted the death ofits host unde: experimental conditions. Oocyst stages, presumed to be those ofHaemogregarina bigemina, were ,' . located in sections through the digestive caeca of G. africana, confirming the vector status ofthe isopod. Development stages of a new species, Haemogregarina curvata, were observed in the leech, Z. arugamensis, and within peripheral blood smears from several fishes. The life cycle oftrypanosomes found in Z. arugamensis and in fishes was also established, although interpreting the morphometries ofthese flagellates was challenging and speciation proved difficult. Identical molecular sequences oftrypanosomes were derived from separate leech samples and these were close to published sequences for marine fish trypanosomes. Thus, both gnathiids and leeches were likely vectors ofthe fish blood protozoans. Finally, probable dual transmission of a haemogregarine and trypanosomes by a leech was illustrated, a rare event, reported infrequently in the literature.
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Nelson, Sandahl Hygeia. "Effects on motor neuron development of altering peripheral targets in embryonic leeches (Hirudo verbana)." Diss., [La Jolla] : University of California, San Diego, 2009. http://wwwlib.umi.com/cr/ucsd/fullcit?p1473082.

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Thesis (M.S.)--University of California, San Diego, 2009.
Title from first page of PDF file (viewed Feb. 1, 2010). Available via ProQuest Digital Dissertations. Includes bibliographical references (p. 31-32).
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Ching, Shim. "Synaptogenesis between identified neurons." Thesis, McGill University, 1995. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=55449.

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Serotonergic Retzius (R) neurons of the leech Hirudo medicinalis in culture reform inhibitory synapses with pressure sensitive (P) neurons while selectively reducing an extrasynaptic, depolarizing response to serotonin (5-HT) in the P neuron. We have examined if the selection of 5-HT responses is restricted to sites of contact between processes and growth cones of these cells. As measured by intracellular recording at the soma, focal application of 5-HT depolarized uncontacted P cell bodies, neurites and growth cones but not processes contacted by R cells. In patch clamp recordings of the depolarizing channels, application of 5-HT modulated channel activity in uncontacted but not in contacted growth cones. The selection of transmitter responses during synaptogenesis is therefore localized to discrete sites of contact specifically between synaptic partners.
Prior experiments have shown that tyrosine kinases play a crucial part in the selection of responses to 5-HT that occurs in the P cell (Catarsi and Drapeau, 1993). To further examine the mechanism responsible for this change in transmitter responses, we have utilized a monoclonal antibody against phosphotyrosine to determine if tyrosine phosphorylation could be detected in P and R cell pairs placed in contact. Our results revealed bright, punctate cytoplasmic staining in P cells paired with R cells.
Embryonic leeches were used to examine how R to P synaptogenesis proceeds in vivo. By filling the R and P neurons with different fluorescent dyes (Lucifer Yellow and Rhodamine-Dextran), confocal microscopy established that putative contact between neuropilar processes were made as early as 11 days of development. Spontaneous, chloride-dependent synaptic potentials in embryonic P cells similar to those seen in adult P cells were observed as early as day 10 of development.
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Books on the topic "Leeches"

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Merrick, Patrick. Leeches. Chanhassen, Minn: Child's World, 2001.

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Ellen, Elias-Bursać, ed. Leeches. Boston: Houghton Mifflin Harcourt, 2011.

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Cole, Taylor. Bloodsucking leeches. New York: Gareth Stevens, 2016.

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Utevsky, Andrei Y. Antarctic piscicolid leeches. Bonn: Zoologisches Forschungsmuseum Alexander Koenig, 2007.

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Halton, Cheryl M. Those Amazing Leeches. Minneapolis, MN: Dillon Press, 1989.

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Utevsky, Andrei Y. Antarctic piscicolid leeches. Bonn: Zoologisches Forschungsmuseum Alexander Koenig, 2007.

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Kekeghe, Stephen. Pond of leeches. Ibadan, Oyo State, Nigeria: Kraftgriots, 2015.

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Steve, Parker. Nematodes, leeches & other worms. Minneapolis, Minn: Compass Point Books, 2006.

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Sawyer, Roy T. Leech Biology and Behaviour, Vol. 3: Bibliography. Oxford: Clarendon, 1986.

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Agapow, Lucjan. Ekologiczne studium zgrupowań pijawek (Hirudinea) w wodach dorzecza Drawy. Szczecin: Wydawn. Akademii Rolniczej w Szczecinie, 1988.

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Book chapters on the topic "Leeches"

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Mehlhorn, Heinz. "Leeches." In Encyclopedia of Parasitology, 1–5. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-642-27769-6_1720-2.

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Mehlhorn, Heinz. "Leeches." In Encyclopedia of Parasitology, 1425–29. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-43978-4_1720.

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Husain, Inna, and Tang Ho. "Medicinal Leeches." In Encyclopedia of Otolaryngology, Head and Neck Surgery, 1623–28. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-23499-6_395.

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Grimaldi, Annalisa, Gianluca Tettamanti, and Magda de Eguileor. "Annelida: Hirudinea (Leeches): Heterogeneity in Leech Immune Responses." In Advances in Comparative Immunology, 173–91. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-76768-0_8.

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Knobloch, Karsten. "Leeches in Microsurgery – An Evidence-Based Approach." In Toxins and Hemostasis, 735–45. Dordrecht: Springer Netherlands, 2010. http://dx.doi.org/10.1007/978-90-481-9295-3_42.

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Harley, Cynthia. "Neurobiology of Locomotion and Behavior in Leeches." In Frontiers in Invertebrate Physiology: A Collection of Reviews, 91–151. New York: Apple Academic Press, 2023. http://dx.doi.org/10.1201/9781003405184-3.

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Blackshaw, Susanna. "Experimental Embryology In Leeches: Cellular and Molecular Approaches." In Experimental Embryology in Aquatic Plants and Animals, 211–31. Boston, MA: Springer US, 1990. http://dx.doi.org/10.1007/978-1-4615-3830-1_12.

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Meyer, Marvin C., and Eugene M. Burreson. "some leeches (Hirudinea: Piscicolidae) of the Southern Oceans." In Biology of the Antarctic Seas XXI, 219–36. Washington, D. C.: American Geophysical Union, 1990. http://dx.doi.org/10.1029/ar052p0219.

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Baskova, I. P. "Leeches Hirudo medicinalis as a Source of Proteolytic Enzyme Inhibitors." In Thrombosis and Thrombolysis, 93–111. Boston, MA: Springer US, 1986. http://dx.doi.org/10.1007/978-1-4684-1659-6_4.

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Mehlhorn, Heinz. "Blood-Sucking Leeches: Not Only Nasty but Also Dangerous and Helpful." In Parasitology Research Monographs, 177–85. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-29061-0_6.

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Conference papers on the topic "Leeches"

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Baskova, I., and G. Nikonov. "LEECH PROSTAGLANDINS AND THE ENZYME DESTAB ILASE AS THROMBOLYTIC AGENTS OF THE PREPARATIONS FROM THE MEDICINAL LEECHES." In XIth International Congress on Thrombosis and Haemostasis. Schattauer GmbH, 1987. http://dx.doi.org/10.1055/s-0038-1643037.

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The thrombolytic effect of the leeching of thromboflebits has been well known from the ancient time. It is provided by the propertiesof the salivary gland secretion though leech saliva does not show proteolytic activity and does not activate plasminogen to plasmin. Butin leech saliva we have found the enzyme destabilase (isopeptidase-glutaminase) which hydrolyze the crosslinked fibrin. This mechanism can be the basis of a new type of fibrinolysis. We have observed the high affinity of destabilase to fibrin that provides the dissolutionof thrombous in circulating citrate blood in experiments in vitro. The high affinity of destabilase to fibrin correlates with its high ability to bound L-lysine, which inhibits isopeptidase and glutaminase activity of destabilase. Using radioimmunoassay for 6-keto-PgF1 we have found prostaglandins in saliva and other preparations from the medicinal leeches:3400 pg/ml of leech saliva322 pg/mg of protein (the whole leeches extract)351 pg/mg of protein (the head region extract)63 pg/mg of protein (blood from the intestinal tract)But the leech prostaglandins in contrast to 6-keto-PgF1 has Strongly inhibited platelets aggregation stimulated by thrombin. The leech prostaglandins stimulate thrombolysis in rats after intravenous injection or oral administration. We have supposed that thrombolytic effect of leech prostaglandins is induced by the release of tissue plasminogen activator from vessel wall.In the experiments on rats it has been shown that thrombolytic effect of leech saliva and preparations from the medicinal leeches is provided by the summary effect of the leech prostaglandins and the enzyme destabilase. After the extraction of prostaglandins by ethylacetate thrombolytic effect is diminished by 4O per cent.
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Nikonov, G., and I. Baskova. "PROTECTIVE ANTITHROMBOTIC ACTION OF THE PREPARATIONS FROM THE LEECHES HIRUDO MED ICINAL IS." In XIth International Congress on Thrombosis and Haemostasis. Schattauer GmbH, 1987. http://dx.doi.org/10.1055/s-0038-1643079.

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Blood letting effect of the medicinal leeches is provided by antihaemostatic properties of the salivary gland secretion. We have demonstrated that the natural salivary gland secretion inhibits the vascular-platelets haemostasis and the contact stage of the intrinsic mechnism of blood coagulation but has no effect on the activation of extrinsic mechanism (Bui 1.Exp.Biol.Med.USSR 97, 6, 696; 8, 142, 1984). Leech prostaglandins (Dokl.Acad.Nauk USSR, 1987) and inhibitors of plasma kallikrein and Factor XI la are the main anti haemostatic agents of the leech saliva.The leech saliva does not change the main parameters of blood coagulation of the healthy animals, such as recalcification time, cephalin time, thrombin and prothrombin time 5, 15 and 25 min after intravenous injection. But the platelets aggregation stimulated by thrombin is diminished by 20% (n=30;p 0,02) Recalcification time, cephalin time and platelets aggregation reduced by intravenous injection of human serum is corrected by leech saliva.As the trigger mechanisms of haemostasis are very much alike the trigger mechanisms of thrombogenes?s, we investigated antithrombotic ability of the leech saliva, extracts of dried leeches and blood of intestinal gut. We used Wessler procedure of throm-bous formation in rats.The thrombous formation was diminished by 90% compared to control when 0.3 ml of the leech saliva (diluted with saline 1:4) was injected intravenously 2-4 hrs before injection of human serum. Thrombous formation was diminished by 40% when time interval was elongated to 24-28 hrs. Antithrombotic effect does not depend on the antithrombin activity of hirudin. It slightly decreased in case of oral administration and increased after the multiple intravenous injections or oral administration.Blood from the leech intestinal tract and other preparations from the leeches exhibit less distinct antithrombotic effect than the salivatory gland secretion.
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Kaygorodova, I. A. "ANTIMICROBIAL PEPTIDES OF PARASITIC LEECHES." In ECOLOGICAL PROBLEMS OF LAKE BAIKAL BASIN. Buryat Scientific Center of SB RAS Press, 2022. http://dx.doi.org/10.31554/978-5-7925-0621-3-2022-59-61.

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Buono, Pietro-Luciano. "Heart Motorneuron Dynamics of Leeches." In EXPERIMENTAL CHAOS: 7th Experimental Chaos Conference. AIP, 2003. http://dx.doi.org/10.1063/1.1612221.

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Walker, Michael W., and Dong-Min Kim. "Satellite Stabilization using Space Leeches." In 1990 American Control Conference. IEEE, 1990. http://dx.doi.org/10.23919/acc.1990.4790954.

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MANDZYAK, N. B., I. A. KAYGORODOVA, and A. V. BOLBAT. "DNA BARCODING OF EASTERN SIBERIAN FLAT LEECHES (HIRUDINEA: GLOSSIPHONIIDAE)." In 5TH MOSCOW INTERNATIONAL CONFERENCE "MOLECULAR PHYLOGENETICSAND BIODIVERSITY BIOBANKING". TORUS PRESS, 2018. http://dx.doi.org/10.30826/molphy2018-57.

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"Genetic diversity of the flat leeches (Hirudinea, Glossiphoniidae) in Western Siberia." In Bioinformatics of Genome Regulation and Structure/ Systems Biology. institute of cytology and genetics siberian branch of the russian academy of science, Novosibirsk State University, 2020. http://dx.doi.org/10.18699/bgrs/sb-2020-130.

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Sergeeva, Svetlana, Oleg Sotnikov, and Natalia Paramonova. "THE ACTION OF PRONASE ON THE NERVE GANGLIA OF MOLLUSKS, LEECHES AND FROGS, CAUSES THE FORMATION OF NEURONS-NEURONAL GAP JANCTION." In XIX INTERNATIONAL INTERDISCIPLINARY CONGRESS NEUROSCIENCE FOR MEDICINE AND PSYCHOLOGY. LCC MAKS Press, 2023. http://dx.doi.org/10.29003/m3366.sudak.ns2023-19/254-255.

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Nurzhanova, F. H., R. S. Karmaliev, and B. G. Sattybaev. "PARASITOLOGICAL MONITORING OF COMMERCIAL FISHES FROM THE BITIK RESERVOIR OF THE WEST KAZAKHSTAN REGION." In THEORY AND PRACTICE OF PARASITIC DISEASE CONTROL. VNIIP – FSC VIEV, 2024. http://dx.doi.org/10.31016/978-5-6050437-8-2.2024.25.290-296.

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The Bitik reservoir is located in the West Kazakhstan Region. The basis of the commercial ichthyofauna of the reservoir consists of local native fish species: rudd (Scardinius erythrophthalmus), sazan (Cyprinus carpio), bream (Abramis brama), tench (Tinca tinca), roach (Rutilus rutilus), goldfish (Carassius auratus), perch (Perca fluviatillis), sander (Sander lucioperca), catfish (Silurus glanus), and pike (Esox lucius). The research purpose was parasitological monitoring of commercial fish to assess the epizootological situation in the Bitik reservoir. The method of complete parasitological dissection and clinical examination were used to study 120 fish. As a result, metacercariae of trematodes Opisthorchis felineus were found in the muscles of the roach, bream and rudd, and Prosthogonimus ovatus, in the muscles of the tench and pike. Diplostomum spathaceum was found in the eye lens of the pike and roach. In the roach, bream, and goldfish, leeches Piscicola geometra were found on the surface of the body and in the oral cavity. Posthodiplostomum cuticola was found on the fins and skin of the roach, rudd, goldfish and bream. Parasite associations were found in the roach (O. felineus, P. suticola, D. spathaceum, P. geometra), bream (O. felineus, P. suticola, P. geometra), rudd (O. felineus, P. cuticola), pike (P. ovatus, D. spathaceum), and goldfish (P. geometra, P. suticola). One parasite species P. ovatus was identified in the tench. No parasites were found in the sander or perch.
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Ye, Lin, Hongli Zhang, and Xiaojiang Du. "Modeling Leechers attack in BitTorrent." In GLOBECOM 2014 - 2014 IEEE Global Communications Conference. IEEE, 2014. http://dx.doi.org/10.1109/glocom.2014.7036886.

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Reports on the topic "Leeches"

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Bednarski, J. M. Preliminary investigations of unconsolidated sediments overlying the Leech River fault zone, southern Vancouver Island, British Columbia. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2016. http://dx.doi.org/10.4095/298809.

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Toft, Brandy. Leech Lake Band of Ojibwe Investment Grade Audit for Service Performance Contracting: First Steps Toward Developing Renewable Energy and Energy Efficiency on Tribal Lands. Office of Scientific and Technical Information (OSTI), April 2019. http://dx.doi.org/10.2172/1509831.

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James, T. S., J. M. Bednarski, G. C. Rogers, and R. G. Currie. LIDAR and digital aerial imagery of the Leech River Fault Zone and coastal regions from Sombrio Point to Ten Mile Point, southern Vancouver Island, British Columbia. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2010. http://dx.doi.org/10.4095/285486.

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Paul, C., and J. F. Cassidy. Seismic hazard investigations at select DND facilities in Southwestern British Columbia: subduction, in-slab, and crustal scenarios. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/331199.

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Southwest British Columbia has some of the highest seismic hazard in Canada and is home to facilities owned by the Department of National Defence which support operations on the west coast of Canada. The potential impact of seismic hazards on these government facilities are investigated here. The hazard is from three primary sources: subduction interface, crustal and in-slab earthquakes. NRCan, in consultation with DRDC have produced representative earthquake scenarios for each of these sources. The subduction scenario we constructed was an M8.9 earthquake extending along the entire Cascadia Subduction Zone from 4 to 18 km depth. We used an M6.8 earthquake occurring along a 30 km fault at between 52 and 60 km depth below Boundary Bay to represent in-slab events. The final scenario, representing a crustal source, was an M6.4 along the central 47 km of the Leech River Valley-Devil's Mountain Fault system. We found that the Cascadia subduction scenario dominated the shaking hazard over much of the study region. Meanwhile, the in-slab and crustal scenarios have higher but more localized hazards in Vancouver and Victoria. In addition to the primary ground motion hazard, we also examined secondary seismic hazards: secondary amplification effects, landslides, liquefaction, surface ruptures, tsunami, flooding, fire, and aftershocks. Each of the secondary hazards had varying impacts depending on the scenario and locations within the region.
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Lassen Volcanic National Park Cascades frog and eDNA inventory final report. National Park Service, 2023. http://dx.doi.org/10.36967/2300696.

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The Cascades frog (Rana cascadae) is one of two frog species known to occur historically in Lassen Volcanic National Park (LAVO) in Northern California. However, no Cascades frogs have been documented in LAVO for several decades, despite repeated surveys. Threats to the species include natural predators, introduction of fish into historically fishless habitats, diseases like fungal pathogens, airborne drift of pesticides from nearby agricultural areas, ultraviolet (UV-B) radiation, wildfires, and habitat loss from human development and climate change. Objectives of this project were to conduct surveys for Cascades frogs at LAVO using both visual encounter surveys (VES) and environmental DNA (eDNA) surveys at locations with potential for reintroduction, conduct VES and eDNA surveys for potential predators (rainbow trout, brook trout, brown trout, and leeches) to determine locations unsuitable for reintroduction, and to develop a suitability model to assess reintroduction potential within LAVO for Cascades frogs. Fifty locations around LAVO were sampled during this study. Suitability for Cascades frogs was ranked according to suitable vegetation availability, elevation, climatic factors, and perennial water availability. Projected climate data was used to derive future climate suitability for Cascades frogs within and around LAVO. No Cascades frog egg masses, larvae, or adults were detected during VES or eDNA sampling within LAVO in 2021. Pacific tree frogs were observed at 18 sites, indicating suitable larval frog habitat at these sites. At 12 of these 18 sites, trout were not detected with either VES or eDNA sampling and leeches were only detected in two locations. The eDNA survey did not appear to be an effective way to detect leeches, but this method was effective for trout species and Cascades frogs. Climate, vegetation, elevation, and perennial water availability were summarized and combined to identify suitable locations within and around LAVO. Climate data for known locations of Cascades frogs in California were used to define a range of suitable climate conditions for the species and then extrapolated across the Cascade frog?s range in California. Within LAVO, occurrence data were not available and, thus, known habitat preferences were combined with spatial data to establish the location and density of suitable vegetation communities and the availability of perennial water. The most suitable areas within the park were identified to occur along the outer boundary and eastern side of the Park. These locations had optimal climate conditions, suitable vegetation communities and available perennial water sources. Many of the areas with high suitability in LAVO were impacted in recent burns (2021), which will reduce their current overall suitability until the vegetation recovers. Projected climate scenarios suggest that, in general, areas surrounding LAVO will decline in temperature suitability while areas within LAVO will increase. Using all available information, sites (based on sub-watersheds) were determined to be of high, medium, or low reintroduction potential. Sites of high reproduction potential included the Cluster Lakes area; Feather Lake and nearby pond; Horseshoe Lake, Snag Lake and Grassy Creek, and vernal pool near Snag Lake trail; and Willow Lake. All the sites with high reproduction potential will require active management to prepare them for Cascades frogs and to maintain them as suitable habitat into the future.
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Hydrogeology and ground-water quality of glacial-drift aquifers, Leech Lake Indian Reservation, north-central Minnesota. US Geological Survey, 1996. http://dx.doi.org/10.3133/wri954077.

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