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epidemiology of ovine helminthiasis in haryana, india.tracer lambs were used to study the pasture contamination with infective stages of helminth parasites during one annual cycle in a subtropical climate. post-mortem worm counts indicated that low infections with haemonchus contortus occurred throughout the year except in june. however, twenty five or more h. contortus per lamb were recorded in january, april, may and august. trichostrongylus colubriformis infection was detected throughout the year and 150 or more worms per lamb were recorded duri ...19883354055
epidemiology of gastrointestinal nematodes of sheep and goats in haryana, india.epidemiological studies on some gastrointestinal nematodes of sheep and goats in karnal, ambala and rohtak districts of haryana (india) revealed that haemonchus contortus and trichostrongylus spp. were responsible for parasitic gastroenteritis in these hosts. the adult parasites persisted in the host throughout the year and there was no indication of hypobiosis. the maintenance of the parasite population depended on a continuous cycle of infection between the host and the pasture. the agroclimat ...19873590608
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