Expansion of bioand geohelminthes in North-caucasian meat-wool and Stavropol breeds sheep and their hybrids in the low land zone of the North Caucasus
There are present results of helminthological survey two sheep breeds (North Caucasian meat-wool and Stavropol) as well as two first generations of their hybrids in the low land zone of Kabardino-Balkaria. The most frequent sheep hel-minthes are Fasciola hepatica, Dicrocoelium lanceatum, Echinococcus granulosus, Avitellina centripunctata, Chabertia ovina, Bunostomum trigonocephalum, Bunostomum phlebotomum, Trichostrongylus axei, Trichostrongylus skrjabini, Nematodirus helvetianus, Nematodirus spathiger, Nematodirus filicollis, Haemonchus contortus and Protostrongylus hobmaeri. Analysis of the extensiveness and intensity of infection show that sheep of the Stavropol breed are infected by the majority of worms (except Fasciola hepatica and Dicrocoelium lanceatum) in significantly lesser degree than the North Caucasus meat-wool sheep breed and their hybrids. This is due to the implementation of the restoration program of the Stavropol breed, including the mandatory veterinary support.