1Department of Veterinary Parasitology, Arawali Veterinary College (Affiliated with Rajasthan University of Veterinary and Animal Sciences, Bikaner), N.H.-52, Jaipur Road, V.P.O. Bajor, Sikar-332001, Rajasthan, India
2Department of Veterinary Microbiology, Arawali Veterinary College (Affiliated with Rajasthan University of Veterinary and Animal Sciences, Bikaner), N.H.-52, Jaipur Road, V.P.O. Bajor, Sikar-332001, Rajasthan, India
*Corresponding author email id: ganguly38@gmail.com
Out of various diseases affecting sheep, parasitic gastroenteritis caused by gastro-intestinal nematodes, mainly Haemonchus contortus, is very important for the sheep in India and is responsible for high mortality and morbidity (Yadav, 1997). The gastrointestinal nematodes of sheep include H. contortus, Telodorsagia circumcinta, Trichostrongylus axei, Nematodirus spp. and Cooperia spp. The proportions of each of these nematodes in sheep populations vary according to geographic location. H. contortus and T circumcincta represent most of the parasite burdens seen in sheep, with H. contortus being present in highest numbers. Anthelmintic resistance is present in all of these parasites, but the prevalence is highest for H. contortus, making it the most economically important gastrointestinal nematodes of sheep (Fleming et al., 2006).
Animal health, Anthelmintic resistance, Gastrointestinal nematodes, Small ruminants, Livestock productivity
