Seasonal prevalence of parasitic infection of yaks in Arunachal Pradesh, India

ObjectiveTo investigate seasonal prevalence of parasitic infection of yak in two yak rearing districts (West Kameng and Tawang) of Arunachal Pradesh, India.MethodsStudy 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.ResultsOut 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.ConclusionAnalysis 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.