Nematodiasis causative agents of the gastrointestinal system of sheep in the Absheron region of Azerbaijan

The research was performed in the Absheron region of the Azerbaijan Republic on private and farmer sheep farms from 2015 to 2020. The complete helminthological dissection method revealed that nematodes such as Trichocephalus ovis, Haemonchus contortus, and Chabertia ovina parasitize the gastrointestinal system of sheep. All 3 species belong to geohelminths. 771 dead and slaughtered sheep were examined by complete helminthological dissection. In the region, the extensiveness of invasion (EI) with Tr.ovis was 43.2%, the intensity of invasion (II) was 1-53 samples, the EI with H.contortus was 35.0%, the EI was 2-56 samples, the IE with Ch.ovina was 25.0 %, II was 1-74 samples. Nematodiasis causative agents were found to be widely distributed in vertical landscape-ecological zones with the predominance of the mountainous zone: Tr.ovis 57.5%, Ch.ovina 39.8%, H.contortus 32.7%. It was also observed that helminths were more widespread in the Khizi district of the region.