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Page No. : 10-13

ABSTRACT

In the present study two unorganized sheep farms from Bahu, Akbarpur village of Rohtak, Haryana, were surveyed to assess the status of anthelmintics against gastrointestinal nematodes using faecal egg count reduction test (FECRT). A total of 90 sheep, 45 from each farm (unorganized sheep farm 1 and 2) with at least 150 egg per gram (EPG) of faeces were selected. Sheep were divided into three groups of 15 animals each in farm 1 (S11, S12 and S13) and farm 2 (S21, S22 and S23). Groups S11 and S21 were treated with fenbendazole (@ 5 mg/kg b.wt. orally), group S12 and S22 were treated with ivermectin (0.2 mg/kg, subcutaneous injection) and group S13 and S23 served as untreated control. Faecal samples were collected on zero and 14th day after treatment from all groups and egg counts were done by the Modifi ed McMaster technique. Per cent reduction in faecal egg counts by fenbendazole and ivermectin in farm 1 was 68.57 and 79.04 and in farm 2 was 76.47 and 85.29, respectively. The post-treatment coproculture of farm 1 and 2 farms showed predominance of Haemonchus contortus larvae. Thus, the present study indicates the presence of moderate anthelmintic resistance against fenbendazole and ivermectin in unorganized sheep farms of Bahu Akbarpur village Rohtak, Haryana.
Keywords: Anthelmintic resistance, FECRT, fenbendazole, Haemonchus contortus, ivermectin, sheep