Detection of benzimidazole resistance against naturally occurring gastrointestinal nematodes in different sheep breeds of Odisha

Gastrointestinal nematodes are a major hindrance in sheep husbandry and the efficient management of these parasites is curbed by the development of anthelmintic resistance. The present investigation was carried in different sheep breeds of Odisha and the status of resistance in gastrointestinal nematodes against Fenbendazole was carried out by in vivo faecal egg count reduction test (FECRT) and in vitro Egg Hatch Assay (EHA) test. The results of the anthelmintic resistance study indicated benzimidazole resistance to gastrointestinal nematodes in Kendrapada, Ganjam and Nondescript breed of sheep while Balangir breed of sheep where found susceptible.