Indian Schistosomes: A Need for Further Investigations

India is uniquely positioned with regard to schistosomes and schistosomiasis—discovering seven new mammalian species with the existence of three more schistosome species: Orientobilharzia turkestanicum, O. harinasutai, and Schistosoma haematobium(?). An endemic focus of urinary schistosomiasis was r...

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Main Authors: M. C. Agrawal, V. G. Rao
Format: Article
Language:English
Published: Wiley 2011-01-01
Series:Journal of Parasitology Research
Online Access:http://dx.doi.org/10.1155/2011/250868
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author M. C. Agrawal
V. G. Rao
author_facet M. C. Agrawal
V. G. Rao
author_sort M. C. Agrawal
collection DOAJ
description India is uniquely positioned with regard to schistosomes and schistosomiasis—discovering seven new mammalian species with the existence of three more schistosome species: Orientobilharzia turkestanicum, O. harinasutai, and Schistosoma haematobium(?). An endemic focus of urinary schistosomiasis was reported from Gimvi village of Ratnagiri, Maharashtra with infrequent occurrence of schistosome eggs in human stools. Cercarial dermatitis has been reported to be more abundant in rural population using ponds, tanks, and so forth, for their domestic purposes. Few dermatitis cases were tested positive by CHR. Schistosome antigen was also detected in urine of five cases suggesting existence of active schistosomiasis in India. Nevertheless, human kind does not appear to be the usual host for Indian schistosomes in contrast to S. haematobium, S. mansoni, or S. japonicum. Various reasons for this phenomenon are discussed including evolution of Indian schistosomes, immune mechanisms, and environmental conditions. These and other aspects such as seasonal effect on the prevalence, snail infectivity, heterologous mating, existence of hybrids, and number of schistosomes in heterologous infections need further investigations with application of molecular techniques. Joint efforts by the national as well as international scientific community would be much more rewarding for better understanding of the parasite and the infection.
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spelling doaj-art-4c9f22aa80f04313af909bd1fd0a5bbf2025-08-20T02:38:40ZengWileyJournal of Parasitology Research2090-00232090-00312011-01-01201110.1155/2011/250868250868Indian Schistosomes: A Need for Further InvestigationsM. C. Agrawal0V. G. Rao1Department of Parasitology, College of Veterinary Science and Animal Husbandry, Jabalpur 482 001, IndiaRegional Medical Research Centre for Tribals, Indian Council of Medical Research, Nagpur Road, P.O. Garha, Jabalpur 482 003, IndiaIndia is uniquely positioned with regard to schistosomes and schistosomiasis—discovering seven new mammalian species with the existence of three more schistosome species: Orientobilharzia turkestanicum, O. harinasutai, and Schistosoma haematobium(?). An endemic focus of urinary schistosomiasis was reported from Gimvi village of Ratnagiri, Maharashtra with infrequent occurrence of schistosome eggs in human stools. Cercarial dermatitis has been reported to be more abundant in rural population using ponds, tanks, and so forth, for their domestic purposes. Few dermatitis cases were tested positive by CHR. Schistosome antigen was also detected in urine of five cases suggesting existence of active schistosomiasis in India. Nevertheless, human kind does not appear to be the usual host for Indian schistosomes in contrast to S. haematobium, S. mansoni, or S. japonicum. Various reasons for this phenomenon are discussed including evolution of Indian schistosomes, immune mechanisms, and environmental conditions. These and other aspects such as seasonal effect on the prevalence, snail infectivity, heterologous mating, existence of hybrids, and number of schistosomes in heterologous infections need further investigations with application of molecular techniques. Joint efforts by the national as well as international scientific community would be much more rewarding for better understanding of the parasite and the infection.http://dx.doi.org/10.1155/2011/250868
spellingShingle M. C. Agrawal
V. G. Rao
Indian Schistosomes: A Need for Further Investigations
Journal of Parasitology Research
title Indian Schistosomes: A Need for Further Investigations
title_full Indian Schistosomes: A Need for Further Investigations
title_fullStr Indian Schistosomes: A Need for Further Investigations
title_full_unstemmed Indian Schistosomes: A Need for Further Investigations
title_short Indian Schistosomes: A Need for Further Investigations
title_sort indian schistosomes a need for further investigations
url http://dx.doi.org/10.1155/2011/250868
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