Especially the biological properties of cultures of P. multocida isolated from animals in the conditions of Astrakhan region

Pasteurellosis (Pasteurellosis) - hemorrhagic septicemia is an infectious disease of many species of mammals and birds, characterized by acute symptoms of septicemia, with subacute and chronic - predominant lung involvement. Pasterella is an actual problem for modern sheep breeding. Pasteurellosis is widespread in all countries of the world. Usually it is noted sporadically and proceeds chronically, but in conditions conducive to its spreading, it manifests as an epizootic. The disease is characterized by high lethality, from 10 to 80%. In small sheep farms, where a closed system of reproduction of animals is used, the chronic form of the disease is widespread, which is characterized by a primary lesion of the respiratory tract and is accompanied by the death of animals and a decrease in their productivity. A significant number of lambs are rejected at a bonitization. This disease is a big problem of sheep breeding in the Astrakhan region, and it has not been sufficiently studied in relation to the conditions of the region. This article describes the features of the biological properties of P. Multocida cultures, which were isolated from lambs with primary lesions of the respiratory tract in conditions of a small farm in the Astrakhan region. It was found that chronic disease prevails among the sheep head. In the study, 14 cultures of pasterel were isolated with their typing using staphylococcal hyaluronidase. It was established that the isolated microorganisms represent two serological variants. A total of 14 pasterel cultures were isolated, ten of which were assigned to serovariant A, and four cultures were typified as P. Multocidaserovar D.