Bioecology of Nematodes of Ruminant Animals of the Nakhchivan Autonomous Republic

The article presents the species composition, extensiveness and intensity of nematode parasitism in the gastrointestinal tract of ruminants in the Nakhchivan Autonomous Republic. The gastrointestinal system of sheep infected with nematode invasion contained 11 nematode species (Ostertagia marshalli, O. trifurcata, O. occidentalis, O. circumcincta, O. ostertagi, Haemonchus contortus, Gongylonema Pulchrum, Trichostrongylus ovis, T. skrjabini, Nematodirus filicollis, N. spathiger). The distribution of the identified species was extensive: Ostertagia marshalli (32%), O. trifurcata (0,4%), O. occidentalis (14,6%), O. circumcincta(26,6%), O. ostertagi (10,6%), Haemonchus contortus (9,3%), Gongylonema pulchrum (5,3%), Trichostrongylus ovis (13,3%), T. skrjabini(16%), Nematodirus spathiger (14,6%), N. filicollis (16%)It was noted that the most common gastrointestinal nematodes in ruminants in our republic are Trichostrongylus ovis (25,3) и Trichostrongylus skrjabini (16%).