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Journal articles on the topic 'Leeches'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Naim, Saglam. "The Economic Importance and Status of Medicinal Leeches in Turkey." Journal of Life Sciences and Biomedicine 71, no. 3 (2016): 83–86. https://doi.org/10.5281/zenodo.8219414.

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Medicinal leeclas are used in the treatment of some diseases since ancient times for medicinal purposes. The best-known and commonly used medicinal leech species are found in Hirudo genus. In this study, the potential of medical leeches in the wetlands of Turkey, the situation and the economic importance were examined. Until the last few years, it was believed that all of the medicinal leeches collected and exported from Turkey were Hirudo medicinalis. But, medicinal leech of Kızılırmak delta that are vast majority of the leech exported from Turkey was seen to be Hirudo verbana. In a recent mo

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2

Karasartova, Djursun, Gonul Arslan-Akveran, Sabiha Sensoz, Kosta Y. Mumcuoglu, and Aysegul Taylan-Ozkan. "Hirudo verbana Microbiota Dynamics: A Key Factor in Hirudotherapy-Related Infections?" Microorganisms 13, no. 4 (2025): 918. https://doi.org/10.3390/microorganisms13040918.

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The gastrointestinal microbiota of medicinal leeches is particularly interesting due to their blood-feeding habits, increasing medical use, and risk of pathogen transmission. Three groups of Hirudo verbana were used to study the leech microbiota: farmed leeches fasting for a long time, farmed leeches recently fed with bovine blood, and wild specimens fed with amphibian blood. The microbiota of the leeches’ mouth, pharynx, crop, and intestine was analyzed. Metasequencing analyses were performed using amplification of the 16S rRNA V3-V4 region on a NovaSeq Illumina platform. The relative abundan

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3

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 l

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4

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

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5

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 (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 vario

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6

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 (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

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7

Arabacı, Büşra. "‘Pearls’ of the nineteenth-century: from therapeutic actors to global commodities medicinal leeches in the Ottoman Empire." Medical History 67, no. 2 (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 inha

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8

Çoruk, Fatma, and Hüseyin Ayhan. "Integrative Treatment Method in Veterinary Medicine: Hirudotherapy." Turkish Journal of Veterinary Research 9, no. 1 (2025): 75–88. https://doi.org/10.47748/tjvr.1570036.

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Traditional and complementary medicine methods have a long history in veterinary medicine. Medicinal leech therapy (hirudotherapy) is one of these methods. Medicinal leeches are sanguivorous invertebrates. While sucking blood to feed, they secrete saliva into the host's body. They contain over 100 bioactive molecules with analgesic, anti-inflammatory, anti-platelet, anticoagulant, and antimicrobial extracellular matrix degeneration effects. Consequently, the leeches treat the host by exhibiting a phlebotomic effect, a range of pharmacological effects due to bioactive molecules, and a reflex st

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9

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 (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

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10

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 (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.

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11

Azmey, Syakirah, Hussein Taha, Gunanti Mahasri, et al. "Population Genetic Structure of Marine Leech, Pterobdella arugamensis in Indo-West Pacific Region." Genes 13, no. 6 (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 hyb

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12

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 pe

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13

Eliseeva, Tatyana A., Yulia V. Bespalaya, Mikhail Y. Gofarov, et al. "Taxonomic and genetic diversity of leeches on the Solovetsky Islands (White Sea, Northern European Russia)." Ecologica Montenegrina 88 (July 1, 2025): 63–70. https://doi.org/10.37828/em.2025.88.6.

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This study presents new data on taxonomic and genetic diversity of freshwater leeches of Bolshoy Solovetsky Island (Russia, White Sea). Seven species of freshwater leeches belonging to five genera and three families were identified. In general, the detected leech species are widespread in the Arctic Region. Our median COI haplotype networks show that the leeches from Bolshoy Solovetsky Island have identical haplotypes or differ by one or three nucleotide substitutions from specimens from continental water bodies of Europe and Siberia. We assume that the dispersal of freshwater leeches to Solov

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14

Miler, Krzysztof, Aleksandra Gurgul, Maja Peryga, and Marcin Czarnoleski. "Larger leeches attack from higher ground – size-dependent preferences for ambush sites in the Bornean terrestrial leech Haemadipsa picta." Journal of Tropical Ecology 35, no. 03 (2019): 140–43. http://dx.doi.org/10.1017/s0266467419000038.

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AbstractThe rain forests of South-East Asia represent a biodiversity hotspot of terrestrial leeches, but we have only fragmentary and often anecdotal information on this component of tropical communities. To address the foraging tactics of terrestrial leeches, we studied the vertical distribution of Haemadipsa picta on foliage in a Bornean tropical rain forest. We investigated the links between leech body length and the above-ground height of their ambush positions under natural conditions and in a choice experiment performed under semi-natural conditions. We studied 167 leeches, which varied

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15

Nazarova, Anna, Andrei Mutin, Denis Skafar, et al. "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 littor

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16

Jones, Simon R. M., and Patrick T. K. Woo. "Development and infectivity of Trypanosoma phaleri in leech and fish hosts." Canadian Journal of Zoology 69, no. 6 (1991): 1522–29. http://dx.doi.org/10.1139/z91-213.

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Trypanosoma phaleri underwent cyclopropagative development in the gut of the leech Desserobdella phalera. Dividing sphaeromastigotes and epimastigotes preceded nondividing, elongate, slender trypomastigotes. The latter forms migrated from the crop to the proboscis sheath, shortened, and acquired infectivity. Metatrypanosomes from the proboscis sheath but not those from the crop were infective. The flagellum of short metatrypanosomes penetrated the cuticular lining of the proboscis sheath. Proboscis-sheath infections were first detected 9 days after an infective blood meal in 2 of 10 leeches in

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17

Siddall, Mark E., and Sherwin S. Desser. "Developmental stages of Haemogregarina delagei in the leech Oxytonostoma typica." Canadian Journal of Zoology 79, no. 10 (2001): 1897–900. http://dx.doi.org/10.1139/z01-136.

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Haemogregarine infections in little skates, Raja erinacea, were assessed for a period of approximately 1 year. Prevalence of Haemogregarina delagei in little skates varied seasonally between 77 and 91%. Prevalence of leeches (Oxytonostoma typica) varied between 9 and 18%. One leech was removed from a little skate (from Passamaquoddy Bay, New Brunswick) heavily infected with H. delagei. Imprints made from the leech's digestive tissue contained haemogregarine oocysts that produced 1632 sporozoites, and meronts with 4 merozoites. The latter were also found in imprints made from salivary tissues.

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18

Kumar, Syal, Gustav J. Dobos, and Thomas Rampp. "Clinical Significance of Leech Therapy in Indian Medicine." Journal of Evidence-Based Complementary & Alternative Medicine 18, no. 2 (2012): 152–58. http://dx.doi.org/10.1177/2156587212466675.

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Traditional Indian medicine—ayurveda—could be the oldest medical system in which leech therapy was adopted for treating specific disease conditions of patients. Some of the indications in which leeches are used are in tumors, hemorrhoids, abscess and boils, skin disorders, ulcers, gout, diseases of the eye, headache, herpes zoster, thrombosis, and wounds. The saliva of the leech consists of anesthetic agents, anticoagulant, antiplatelet aggregation factor, antibiotic, anti-inflammatory substances, and gelatinous substances. Leeches suck the excess blood, reduce the swelling in the tissues, and

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19

A., Hopkins William, Bill Moser, David Garst, Richardson Dennis J., Hammond Charlotte I., and Lazo-Wasem Eric A. "Morphological and molecular characterization of a new species of leech (Glossiphoniidae, Hirudinida): Implications for the health of its imperiled amphibian host (Cryptobranchus alleganiensis)." ZooKeys 378 (February 7, 2014): 83–101. https://doi.org/10.3897/zookeys.378.6545.

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The hellbender (<i>Cryptobranchus alleganiensis</i>)<b> </b>is among the most intriguing and imperiled amphibians in North America. Since the 1970s and 80s, western populations of the Ozark and eastern subspecies in Missouri have declined by nearly 80%. As a result of population declines, the Ozark hellbender was recently federally protected as an endangered species, and the eastern subspecies was granted protection under CITES. Although habitat degradation is probably the biggest threat to hellbender populations, recent evidence suggests that pathogens including chytrid fungus and “flesh-eati

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20

Lent, C. M., K. H. Fliegner, E. Freedman, and M. H. Dickinson. "Ingestive behaviour and physiology of the medicinal leech." Journal of Experimental Biology 137, no. 1 (1988): 513–27. http://dx.doi.org/10.1242/jeb.137.1.513.

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Ingestion lasts 25 min in Hirudo medicinalis and is characterized by pharyngeal peristalsis which fills the crop. This peristalsis has an initial rate of 2.4 Hz which decays smoothly to 1.2 Hz at termination of ingestion. During ingestion, the leech body wall undergoes peristalsis which appears to aid in filling the crop diverticula. Body peristalsis begins at a rate of 10 min-1 and decreases linearly to 2 min-1 at termination. The body also undergoes dorsoventral flexions when blood flow is occluded. Blood meal size increases slightly with leech size: 8.4 g for 1-g leeches and 9.7 g for 2-g l

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21

Naim, Saglam. "Basic Principles of Breeding of Medicinal Leech, Hirudo verbana." Journal of Life Sciences and Biomedicine 71, no. 3 (2016): 79–82. https://doi.org/10.5281/zenodo.8219407.

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Leeches are known as both therapeutic invertebrate live and parasites for people since ancient times. In this study, the basic principles of leech breeding were prepared by evaluating of the data obtained from studies carried out at Firat University, Faculty of Fisheries. Two soil pools that have total surface area 1500 m², and five pieces 600 1 recirculating tanks for the culture of leeches were used. The criteria were prepared to produce one million pieces of leeches with the knowledge accumulated on the breeding of medicinal leeches over many years. For the culture of Hirudo verbana, 6

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22

Zahra, Aminatul, Okto Rimandi Bakkara, Shavika Miranti, et al. "Application of Rosmery (Rosmarinus officinalis) Solution to Reduce Marine Leeches in “Cantang” Hybrid Grouper (Epinephelus fuscoguttatus x Epinephelus lanceolatus)." BIO Web of Conferences 79 (2023): 13004. http://dx.doi.org/10.1051/bioconf/20237913004.

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One common disease that attacks hybrid grouper is marine leech (Zeylanicobdella sp.). Therefore, it is necessary to take safe and environmentally friendly treatment steps, namely bathing fish infected with marine leeches with rosemary solution. This research examined the application of rosemary solution with different concentrations and bathing times to decrease the intensity of marine leech infections in “cantang” hybrid grouper (Epinephelus fuscoguttatus x Epinephelus lanceolatus). The experimental design of this research was a randomized factorial design (rosemary solution concentration fac

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23

Ugural, Bahadır, and Ramazan Serezli. "Effects of various environments on number of cocoon and offspring in breeding of southern medicinal leech, Hirudo verbana Carena, 1820." Ege Journal of Fisheries and Aquatic Sciences 37, no. 3 (2020): 207–11. http://dx.doi.org/10.12714/egejfas.37.3.01.

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Breeding medicinal leeches in controlled environments is extremely important in order to prevent their extinction. Moreover, due to medicinal leeches coming into contact with the patient's blood, breeding medicinal leeches in hygienic conditions is essential to prevent possible complications. In this study, breeding patterns of Hirudo verbana were studied in controlled conditions and the effects of various moist environments were examined. Peat, hydrogel and chopped sponge materials were compared in terms of number of cocoon and offspring in medicinal leech breeding. Peat and hydrogel environm

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Mulilo, Misheck A., Joyce Siwila, Philbert B. Madoshi, and Richard S. Silayo. "Hirudiniasis in Cattle in Mpwapwa District, Dodoma Region of Tanzania." Case Reports in Veterinary Medicine 2020 (March 27, 2020): 1–6. http://dx.doi.org/10.1155/2020/3028345.

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Hirudiniasis is a condition caused by infestation by leeches. Despite the annoyance, clinical signs, and associated lesions caused by leeches in both humans and animals, the extent of the problem in Tanzania is not well elucidated. Individual animals and people become infested when they drink, bath, or walk through contaminated water sources. Leech infestations are more common in rural areas where water is scarce especially during the dry season. In this report, clinical cases of hirudiniasis in twenty-seven (27) cattle in Mpwapwa, Tanzania, are presented. The report further reviews the morpho

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25

Simon, T., and K. Barnes. "Olfaction and prey search in the carnivorous leech Haemopis marmorata." Journal of Experimental Biology 199, no. 9 (1996): 2041–51. http://dx.doi.org/10.1242/jeb.199.9.2041.

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Haemopis marmorata, the green horse leech, is carnivorous and readily eats earthworms. Using a Y-maze with flowing water, we show that specimens of H. marmorata are attracted to live earthworms. Ablating the dorsal lip, the presumed site of the chemoreceptors that this species uses in prey search, disrupts the ability of the leeches to find the earthworms in the Y-maze. Earthworm wash, a preparation of the collagen coating of earthworm skin, shock-induced earthworm secretion, mammalian blood and a salt&shy;arginine mixture are not attractive to the green horse leech. The tails of freshly k

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26

Chernaya, L. V., L. A. Kovalchuk, D. K. Kozhaeva, D. V. Zhantegolov, and N. V. Mikshevich. "NEW FINDINGS OF MEDICINAL LEECH HIRUDO VERBANA (CARENA, 1820) IN THE AQUATIC ECOSYSTEMS OF KABARDINO-BALKARIA." Водные биоресурсы и среда обитания 7, no. 1 (2024): 27–33. http://dx.doi.org/10.47921/2619-1024_2024_7_1_27.

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Background. Medicinal leeches are a traditional aquatic biological resource in Russia, officially used in practical medicine, pharmacology and cosmetology. However, in recent decades, the distribution range and abundance of these valuable aquatic organisms on the Russian territiry have decreased considerably. Relevance. The study of the present geographical range of this exploitable leech species is of practical importance, since the modern technology of their controlled breeding at biological production facilities requires constant replenishment of the broodstock and procurement of mature ind

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27

Yadav, Satish, and Bingqiang Zhang. "An uncommon cause of unilateral nasal bleeding." Grande Medical Journal 2, no. 1 (2020): 25–27. http://dx.doi.org/10.3126/gmj.v2i1.45695.

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Leeches are segmented worms that belongs to phylum Annelida and Hirudinea subclass. They are commonly found in stream water, land and sea. Leech infestation is seen in people swimming or drinking water inhabited by leech. The most common symptom of nasal leech is unilateral nasal bleeding. In this case report, a ten-year-old Chinese boy went swimming in the river in countryside prior to the incident. On examination, he was found to have a leech in his left nostril. The leech self- extruded after irrigation with 5ml of normal saline. Health workers must be aware of the possibility of a leech as

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Kikuchi, Yoshitomo, Shinya Sameshima, Osamu Kitade, Junichi Kojima, and Takema Fukatsu. "Novel Clade of Rickettsia spp. from Leeches." Applied and Environmental Microbiology 68, no. 2 (2002): 999–1004. http://dx.doi.org/10.1128/aem.68.2.999-1004.2002.

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ABSTRACT Intracellular rickettsia-like structures were found in the tissues of a glossiphoniid leech, Torix tagoi, by transmission electron microscopy. Diagnostic PCR analysis using specific primers suggested that of the nine glossiphoniid species examined, two species, T. tagoi and Hemicrepsis marginata, harbored bacteria of the genus Rickettsia. A 1.5-kb eubacterial 16S rRNA gene segment obtained from each of these species was amplified by PCR, cloned, and sequenced. Phylogenetic analysis of the 16S rRNA gene demonstrated that the Rickettsia species found in the leeches constituted a novel c

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Siddall, Mark E., Paul L. Worthen, Matthew Johnson, and Joerg Graf. "Novel Role for Aeromonas jandaei as a Digestive Tract Symbiont of the North American Medicinal Leech." Applied and Environmental Microbiology 73, no. 2 (2006): 655–58. http://dx.doi.org/10.1128/aem.01282-06.

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ABSTRACT The gut bacteria of the North American medicinal leech, Macrobdella decora, were characterized. Biochemical tests and DNA sequences indicated that Aeromonas jandaei is the dominant culturable symbiont in leeches from a broad geographic area. In this work we identified a new habitat for A. jandaei, and here we suggest that there is unexpected specificity between leeches and Aeromonas species.

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Bower, S. M., L. Margolis, and R. J. MacKay. "Potential Usefulness of Chlorine for Controlling Pacific Salmon Leeches, Piscicola salmositica, in Hatcheries." Canadian Journal of Fisheries and Aquatic Sciences 42, no. 12 (1985): 1986–93. http://dx.doi.org/10.1139/f85-246.

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Susceptibility to the lethal effects of low levels of total residual chlorine (TRC) differed between juvenile coho salmon (Oncorhynchus kisutch) and the salmon leech (Piscicola salmositica), the vector for the haemoflagellate salmonid pathogen Cryptobia salmositica. There was no salmon mortality at concentrations below approximately 50 μg TRC/L for the maximum exposure time of 24 h. Some damage to gill tissue (hypertrophy, fusion, oedema, and some necrosis), was observed at the highest concentrations of TRC that did not kill any of the fish (approximately 50 μg/L for 24 h, and approximately 10

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Baca, Serapio M., Eric E. Thomson, and William B. Kristan. "Location and Intensity Discrimination in the Leech Local Bend Response Quantified Using Optic Flow and Principal Components Analysis." Journal of Neurophysiology 93, no. 6 (2005): 3560–72. http://dx.doi.org/10.1152/jn.01263.2004.

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In response to touches to their skin, medicinal leeches shorten their body on the side of the touch. We elicited local bends by delivering precisely controlled pressure stimuli at different locations, intensities, and durations to body-wall preparations. We video-taped the individual responses, quantifying the body-wall displacements over time using a motion-tracking algorithm based on making optic flow estimates between video frames. Using principal components analysis (PCA), we found that one to three principal components fit the behavioral data much better than did previous (cosine) measure

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Shital, Deshmukh. "Distribution of Leech Faunal Diversity in Ecosystem of Dharni Region." Int. Res. Journal of Science & Engineering, 2023 A13 (December 31, 2023): 35–40. https://doi.org/10.5281/zenodo.10516177.

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Biodiversity is one of the important cornerstones of sustainable development and represents the biological wealth of a given nation. A common misconception about leeches is that there is only one kind of leech. In fact, there are wide variety of species of leeches worldwide and they can be found in a variety of different habitats including marine, estuarine, moist and freshwater ecosystems. Within these habitats, leeches can be found attached to various substrates including fish and other marine creatures, underneath rocks or clinging to vegetation (moist terrestrial), or living on stones, and

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Pfordt, Victoria, Pegah Kalatehjari, Céline Tolksdorf, Bernhard H. Rauch, and Christian Müller. "Go West: Hirudins and Decorsin/Ornatin-like Platelet Aggregation Inhibitors in Two Representatives of American Hematophagous Leeches." Parasitologia 2, no. 4 (2022): 313–25. http://dx.doi.org/10.3390/parasitologia2040026.

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Hematophagous leeches express a broad variety of secretory factors in their salivary glands; among them are hirudins, inhibitors of blood coagulation, and decorsins/ornatins, inhibitors of platelet aggregation. Here, we describe the identification and molecular and functional characterization of putative hirudins and decorsins/ornatins in two leech species of American origin, Limnobdella mexicana and Haementeria vizottoi. The leech species represent two orders of leeches, the proboscis-bearing Rhynchobdellida and the non-proboscis-bearing Arhynchobdellida. Members of the hirudin superfamily, s

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Dadashova, L., and A. Mammadov. "Intraspecies Molecular DNA Polymorphism and Threat of Hirudo orientalis." Bulletin of Science and Practice 10, no. 5 (2024): 102–11. http://dx.doi.org/10.33619/2414-2948/102/13.

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Medical leeches play the role of a natural factory for the production of a complex of unique biologically active substances such as hirudin, eglins, bdellins, hementin, bradykinins, which are urgently needed by modern medicine and veterinary medicine. Medical leeches produce a wide range of enzymes such as hyalinodase, destabilase, collagenase, apyrase, elastase and triglyceride. All these substances are biologically active substances of natural origin. It is used to treat a wide range of diseases, such as amenorrhea, osteoarthritis, trauma, and blood stasis syndrome. In modern times, leeches

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Nakano, Takafumi, Hajime Suzuki, Naoko Suzuki, et al. "Host–parasite relationships between seabirds and the haemadipsid leech Chtonobdella palmyrae (Annelida: Clitellata) inhabiting oceanic islands in the Pacific Ocean." Parasitology 147, no. 14 (2020): 1765–73. http://dx.doi.org/10.1017/s0031182020001729.

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AbstractThe duognathous haemadipsid leeches of the genus Chtonobdella show a trans-oceanic distribution throughout the Indo-Pacific region. Although passive long-distance dispersal (LDD) of Chtonobdella leeches by birds has been suggested, little is known about the host–parasite relationships between avian hosts and Chtonobdella leeches. In the current study, we investigated Chtonobdella leech infestations of the eyes and other mucus membranes of migratory procellariiform seabirds, Pterodroma hypoleuca and Oceanodroma tristrami, captured at six locations in the Bonin Islands, Honshu and Okinaw

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landa, jorge, juan c. arronte, pablo abaunza, and antonio c. fariña. "calliobdella lophii (hirudinea: piscicolidae) parasitizing white anglerfish lophius piscatorius off the north of spain." Journal of the Marine Biological Association of the United Kingdom 85, no. 5 (2005): 1297–300. http://dx.doi.org/10.1017/s0025315405012476.

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this paper describes the interaction between two species: white anglerfish lophius piscatorius and its specific leech parasite calliobdella lophii off the north of spain. catches of white anglerfish by the spanish gill-net fleet operating in those waters were sampled monthly in 2001. abundance, mean intensity and prevalence were used to analyse infestation level by c. lophii. prevalence of leeches and fish length was significantly correlated. mean intensity was higher on larger white anglerfish. significant differences were found in the presence of leeches by fish length between areas, with hi

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Khan, R. A. "Trypanosome occurrence and prevalence in the marine leech Johanssonia arctica and its host preferences in the northwestern Atlantic Ocean." Canadian Journal of Zoology 69, no. 9 (1991): 2374–80. http://dx.doi.org/10.1139/z91-334.

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In this study, the distribution, abundance, host selection, and prevalence of trypanosomes in the marine leech Johanssonia arctica in the northwestern Atlantic were investigated. This leech is widely distributed and is encountered more often in the Labrador – northeastern Newfoundland area, especially at depths of 165 m or more, where water temperatures of about 0 °C prevail. It rarely occurs south and west of Newfoundland, where warmer bottom temperatures occur. The highest prevalence of the trypanosome (Trypanosoma murmanensis) infection was found in leeches collected from a depth of 165 m i

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Kaygorodova, Irina, and Antonina Natyaganova. "Karyotype characterization of the endemic piscine leech from Lake Baikal with vindication of Baicalobdella cottidarum Dogiel, 1957 (Piscicolidae, Hirudinea)." Archives of Biological Sciences 67, no. 4 (2015): 1405–10. http://dx.doi.org/10.2298/abs1412205119k.

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In this paper, we present for the first time data on karyotype analysis of leeches of the genus Baicalobdella (Piscicolidae) parasitizing Lake Baikal endemic cottoid fishes. Both mitotic and meiotic chromosomes are described. Leech testisacs were processed by a ?shaking-blotting? technique, and chromosomal preparations were stained with water-based fuchsine. Diploid and haploid chromosome sets demonstrated 2n=34 and n=17, respectively, with maximal chromosome length of 1.5-3.0 ?m. Comparative karyotype analysis of two ecological forms of Baicalobdella leeches revealed differences in chromosome

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Fedorova, Lyudmila I., and Irina A. Kaygorodova. "First data on the Hirudinea fauna of lotic ecosystems of the Khanty-Mansi Autonomous Area (Russia)." ZooKeys 1082 (January 19, 2022): 73–85. http://dx.doi.org/10.3897/zookeys.1082.71859.

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Hirudinea, a small and ecologically important group of aquatic organisms, is poorly studied in northern Eurasia. In this study, we demyth the idea of the faunistic poverty of this region and present the first findings of rheophilic leeches from the Khanty-Mansi Autonomous Area, Russia. Investigation of 25 rivers (Severnaya Sosva, Ob, Konda-Irtysh, and Bolshoi Yugan river basins) resulted in finding 10 leech species with parasitic and non-parasitic life strategies. These species belong to two orders (Rhynchobdellida and Arhynchobdellida), three families (Glossiphoniidae, Piscicolidae, and Erpob

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Fedorova, Lyudmila I., and Irina A. Kaygorodova. "First data on the Hirudinea fauna of lotic ecosystems of the Khanty-Mansi Autonomous Area (Russia)." ZooKeys 1082 (January 19, 2022): 73–85. https://doi.org/10.3897/zookeys.1082.71859.

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Hirudinea, a small and ecologically important group of aquatic organisms, is poorly studied in northern Eurasia. In this study, we demyth the idea of the faunistic poverty of this region and present the first findings of rheophilic leeches from the Khanty-Mansi Autonomous Area, Russia. Investigation of 25 rivers (Severnaya Sosva, Ob, Konda-Irtysh, and Bolshoi Yugan river basins) resulted in finding 10 leech species with parasitic and non-parasitic life strategies. These species belong to two orders (Rhynchobdellida and Arhynchobdellida), three families (Glossiphoniidae, Piscicolidae, and Erpob

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Sawyer, Roy T. "History of the Leech Trade in Ireland, 1750–1915: Microcosm of a Global Commodity." Medical History 57, no. 3 (2013): 420–41. http://dx.doi.org/10.1017/mdh.2013.21.

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AbstractIn the nineteenth century the medicinal leech Hirudo medicinalis evolved into a lucrative commodity in great demand throughout the western world. In less than a century its trade became big business by any measure, involving tens of millions of animals shipped to every inhabited continent. In this context Ireland is particularly instructive in that it was the first country in Europe to exhaust its supply of native leeches. Concomitantly, it was also the first country to import leeches from abroad, as early as 1750. Being an island with manageable border controls, and a clearly definabl

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Yang, Zi-Bin, Yan Liu, Qiu-Juan Zhang, Bing-Ran Zhang, and Ming-Wei Liu. "Case report of recurrent epistaxis caused by a live leech in the nasal cavity." Medicine 103, no. 14 (2024): e37720. http://dx.doi.org/10.1097/md.0000000000037720.

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Rationale: Epistaxis is one of the common emergencies in otolaryngology. There are many causes of epistaxis, but reports of epistaxis due to nasal foreign bodies like leeches are rare. Patient concerns: A 55-year-old male presented with “repeated epistaxis for over 20 days.” Nasal endoscopy revealed a live leech in the olfactory area of the left nostril. Diagnoses: The patient was diagnosed with epistaxis caused by a live leech in the nasal cavity. Interventions: Under nasal endoscopy, the leech was grasped with a vascular clamp and removed from the nasal cavity. The leech measured 8 cm in len

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Bayramov, A., and M. Maharramov. "Leeches (Annelida, Hirudinea) Fauna of Nakhchivan Autonomous Republic." Bulletin of Science and Practice 10, no. 1 (2024): 86–91. http://dx.doi.org/10.33619/2414-2948/98/11.

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The fauna of the leeches of Nakhchivan Autonomous Republic is represented by 10 species belonging to 9 genera, 5 families, 2 orders and one class. According to zoogeographical affiliation, leech species belong to 4 faunistic complexes. In the benthic infauna of various types of water bodies, glossyphonides predominate in the frequency of occurrence and abundance of individuals. An extremely rare medical leech (Hirudo medicinalis) is the only practically useful representative of the girudofauna. Functional significance of other species in biocenoses is low. The article also presents data on mor

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Kikuchi, Yoshitomo, and Takema Fukatsu. "Endosymbiotic Bacteria in the Esophageal Organ of Glossiphoniid Leeches." Applied and Environmental Microbiology 68, no. 9 (2002): 4637–41. http://dx.doi.org/10.1128/aem.68.9.4637-4641.2002.

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ABSTRACT We characterized the intracellular symbiotic bacteria of the hematophagous glossiphoniid leeches Placobdelloides siamensis and a Parabdella sp. These leeches have a specialized structure called an “esophageal organ,” the cells of which harbor bacterial symbionts. From the esophageal organ of each species, a 1.5-kb eubacterial 16S rRNA gene segment was amplified by PCR, cloned, and sequenced. Diagnostic PCR detected the symbiont in the esophageal organ and intestine. Phylogenetic analysis of the 16S rRNA gene(s) demonstrated that the symbionts from the leeches formed a monophyletic gro

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Mohanty, Bishnupriya, Divya Naik, and Sangram Keshari Das. "JALAUKA ANUSHASTRANAM-AN INTEGRATED UNDERSTANDING." International Ayurvedic Medical Journal 11, no. 6 (2023): 1285–87. http://dx.doi.org/10.46607/iamj1111062023.

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The basic Ayurvedic treatment is based on two principles viz. Shodhan Chikitsa (Elimination Therapy) and Shaman Chikitsa (Internal medicine). Shodhana Chikitsa deals with five purificatory procedures popularly known as Panchakarma. Acharya Susruta included Rakta Mokshana in Panchakarma and described it as the best procedure because it eliminates all three vitiated Doshas viz. Vata, Pitta & Kapha. Jalaukavacharana is a type of Raktamokshana where leeches are used for bloodletting. This is considered the most effective and unique method of Raktamokshana as vitiated Doshas are removed from th

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Dadashova, L. "Modern Situation of Hirudo orientalis in Lankaran Natural Province Water Basins." Bulletin of Science and Practice 10, no. 1 (2024): 80–85. http://dx.doi.org/10.33619/2414-2948/98/10.

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The Eastern medical leech (Hirudo orientalis Utevsky et Trontelj, 2005) belongs to the Hirudinea class to a Euhirudinea subclass to the Gnathobdellidae order, Hirudo genus. H. orientalisis ectoparasitic bloodsucking. Medicinal leeches feed by sucking blood of the vertebrates such as mammals, fish, amphibians, birds and reptiles. They live in the freshwater basins in swamps, rivers and lakes. Materials were collected through the suture-catching nets to breed leeches and carry out investigations in laboratory conditions. The study was carried out in 2018-2020 in the 42 water bodies of the Lankar

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Conan, Antonin, Astolfo Mata, Eloïse Lenormand, et al. "Causes for the High Mortality of European Green Toad Tadpoles in Road Stormwater Ponds: Pollution or Arrival of a New Predator?" Diversity 15, no. 4 (2023): 485. http://dx.doi.org/10.3390/d15040485.

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Declining wetland areas cause many amphibian species to breed inside stormwater ponds (SWPs), which have been constructed alongside major roads to collect and retain polluted road runoff water. However, the suitability of such artificial ponds as a breeding habitat for amphibians remains unclear. Recently, a study found a very low survival rate of European green toad tadpoles (Bufotes viridis) inside SWPs, presumably because of high sediment pollution and/or the presence of a leech Helobdella stagnalis. To establish the effects of sediment pollution and leech presence on tadpole growth and sur

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ŠATKAUSKIENĖ, INGRIDA, and JURGITA RUTKAUSKAITĖ-SUCILIENĖ. "The present state of the leech fauna (Annelida: Hirudinea) in Lithuania." Zootaxa 5115, no. 1 (2022): 47–62. http://dx.doi.org/10.11646/zootaxa.5115.1.3.

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The aim of the present study is to present the composition of the leech fauna from Lithuania. Based on morphology, 12 species of leeches belonging to 10 genera and 5 families (Haemopidae, Hirudinidae, Glossiphoniidae, Erpodellidae and Piscicolidae) were identified in the country. Comparison of the data generated in current study with historical records, we extend the list of species to 21. Additional localities of Hirudo medicinalis and Erpobdella monostriata, two uncommon leeches, were established in Lithuania.

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Sproll, Christoph, Julian Lommen, Adriana Balasiu, et al. "Lethal Aeromonas veronii Sepsis in the Course of Medicinal Leech Therapy." Antibiotics 11, no. 9 (2022): 1180. http://dx.doi.org/10.3390/antibiotics11091180.

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A patient with oral squamous cell carcinoma (OSCC) underwent complex surgical tumor therapy, including the reconstruction of soft tissues using a radial forearm flap. Due to venous congestion that could only partly be resolved by revision surgery, leech therapy was started on the second postoperative day. The patient developed pneumonia and sepsis and died as a result of septic shock, despite having received targeted broad-spectrum antibiotic therapy since day 5. Aeromonas spp. were cultured from both the patient’s specimens and unused leeches. Biochemical identification and matrix-assisted la

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Upton, Joseph. "LEECHES." Plastic and Reconstructive Surgery 79, no. 2 (1987): 311. http://dx.doi.org/10.1097/00006534-198702000-00050.

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