Vol 27 No 2 December - The Indian Society for Parasitology

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SHORT COMMUNICATIONS On a new species of the genus Hexacanalis Perrenoud (1931) from the spiral 124 valve of Dicerobatis eregoodoo Hemlata Wankhede Prevalence of Cysticercus tenuicollis infection in slaughtered sheep and 126 goats at Kakinada, Andhra Pradesh T.Bhaskara Rao, P.V. Vara Prasad and Md. Hafeez Prevalence of Fascioliasis in goats in Kanpur 128 S. Bano & N. Sultana - Journal of Parasitic Diseases Form IV - Subject Index - Author Index - List of Reviewers (2003)
Journal of Parasitic Diseases Vol. 27 (2) Dec. 2003, pp. 69-75 Helminth Parasites of Public Health Importance - Trematodes Review MD. HAFEEZ Professor & University Head, Department of Parasitology, College of Veterinary Science, A.N.G. Ranga Agricultural University, Tirupati - 517 502, India Parasitic zoonoses are now well recognized as important public health problems throughout the world, both in developing and developed countries. There is a need to analyse the five components of zoonoses, which are the parasite, reservoir host, intermediate host, potential hosts and environment. The risk of human beings acquiring parasitic zoonoses seems to be greatly dependent on behaviour and food habits. Avoidable potential diseases have come to stay due to lack of awareness on the one hand and complacence on the other. The accumulation and improper disposal of animal waste and effluents including infected offal from abattoir is just another threat. With the knowledge of various studies made on different aspects of Helminths, particularly the Trematodes, prevention and control can be affected by breaking the chain of transmission at its epidemiologically weakest link. Keeping this in view the trematode infections of public health importance are considered here. Key words : Helminths, Public health importance, Trematodes. Agreat many parasites of animals are capable of Segmentina trochideus in Assam S. hemisphaerula in inciting clinical disease in man, in their adult or China, Formosa and Japan : Hippeutis cantori (S. larval stages. (Anantharaman, 1967). The three Schnackeri) in China and Gyraulus convexiculus in recognized subclasses of Digenea (diagenetic Indo China, Philippines, Indonesia and India. trematodes) produce infection in man and higher Cercariae after emergence from the snails encyst on animals. Of the various trematode infections blood the plants / Vegetation / seed/Pods etc. The common flukes have been dealt separately. Other trematode plant hosts are water chestnuts namely Trapa bicornis infections of public health importance are considered in India, T. bisoinosa in Formosa, Eliocharis tuberosa here. (Faust et al., 1975) in South China and Formosa. The water calatrop Trapanatans in canton, China; water bamboo Elizania Mostly Digenea (digenetic Trematodes) produce aquatica or water hyacinth Echhornia crassipes in infections in man and animals of the various fluke Formosa. Transmission occurs by the ingestion of infections. Intestinal, Amphistome, Echinostome, Metacercariae in fresh or uncooked edible water plants Heterophyid, Hepatic, Pulmonary and Blood flukes etc., use of human excreta containing the eggs of F. are considered to be more important and responsible buski to fertilize fields or aquatic plants provides a for environmental pollution. Pathak. (1991) reviewed major source of inoculum for the molluscan stages of the fundamentals of parasitic zoonoses. the lifecycle. Children are likely to have heavy INTESTINAL FLUKES infection. The infection is common due to peeling of Faciolopsis buski the parasitised plants with the teeth. After encysting in the duodenum the young flukes become attached to the The giant intestinal fluke was observed by Busk in the nearby intestinal wall and develop into adult worms in duodenum of Laskar sailor at autopsy in London. It about three months. (Parija 1990) occurs in the small intestine of man and pig in South Eastern parts of Asia. Dogs are occasionally infected, The damage produced by these large fleshly worms is although they appear to be partially resistant to mechanical, obstructive and toxic. At each site of infection. Important snail intermediate hosts are attachment a mucosal ulcer is produced. A few worms may not cause serious intestinal symptoms but more
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Vol 27 No 2 December - The Indian Society for Parasitology

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