Abstract

Objective: To investigate seasonal prevalence of parasitic infection of yak in two yak rearing districts (West Kameng and Tawang) of Arunachal Pradesh, India. Method: Study was based on identification of parasitic ova/oocysts through coproscopy and isolation and identification of organisms on necropsy. During the period under report a total of 895 faecal samples were collected and samples were examined both by floatation and sedimentation techniques. Results: Out of 895 sample faecal samples, 5.47% samples were positive for protozoa and helminth infections. Infection was the highest during spring followed by rainy, autumn and winter seasons. The highest prevalence was of Strongyle (51.02%) followed by Eimeria (34.69%), Trichuris globulosa (14.28%), Strongyloides (10.20%), Dicrocoelium and Mammomonogamus laryngeus (8.16% each) amphistome and Toxocara vitulorum (6.12% each) and Fasciola gigantica (4.08%). On necropsy unilocular cysts of Echinococcus granulosus and adult worms of Fasciola gigantica were isolated and identified. Conclusions: Analysis of data revealed that, infection was more in unorganised herd compared to organised herd. In this communication report of Mammomonogamus laryngeus seems to be the first report from India.

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