УДК: 619:616-006.44 DOI 10.33861/2071-8020-2022-4-4-6 Staroselov M.A. Summary. Immunocorrectors of various pharmacological groups are used in order to correct immunity in the prevention and therapy of viral infections of the respiratory tract of young large horned cattle. The state of the immune system in animals of different ages should be taken into account using immunocorrectors: in newborns and young calves up to 2 months of age, the functional activity of the immune system is low, the organism is protected by the humoral link (colostral immunity) and the phagocytosis system. The maturity of the immune system increases at the older age, the cellular link is connected to implement protection, the animal is able to actively respond to viral and bacterial antigens. The effect of two immunocorrectors with a wide spectrum of action - Imaktin and Imunofan -on immunobiological parameters in three-month-old calves at bronchopneumonia was studied using along with the traditional therapeutic regimen. Drugs used in the therapeutic regimen at bronchopneumonia in calves normalize the number of leukocytes and segmented neutrophils, which indicates a decrease in the inflammatory response, increase phagocytosis, increase the amount of total protein and normalize its fractional composition, reduce acidosis, activate the production of secretory antibodies of the respiratory tract. Keywords: large horned cattle, immunity, prevention, hematological reaction, immunology, immunobiological index, immunocorrector, Immunofan, Imaktin. References: 1. Buzlama V.S. Ekologicheskiy faktor [Ecological factor]. - 2000: 25-27. 2. Staroselov M.A., Basova N.Yu., Skhatum A.K., Fedorov Yu.E., Pachina V.V., Markov A.N. Vliyanie prebiotika Baskin-vet na mikrobiotsenoz kishechnika novorozhdennykh telyat [Influence of Baskin-vet prebiotic on the intestinal microbiocenosis of newborn calves]. - Rossiyskiy zhurnal. Problemy veterinarnoy sanitarii, gigiyeny i ekologii. - 2016 (1 (17). - pp. 72-75. 3. Dementyeva M.S., Krysenko YU.G., Ivanov I.S. Izuchenie pokazateley krovi telyat pri primenenii vaktsiny «Klostbovak-8» v sochetanii s immunomodulyatorom [Study of blood parameters of calves using the Klostbovak-8 vaccine in combination with an immunomodulator]. - Academic notes of Kazan state academy of veterinary medicine named after N. Bauman. - Kazan, 2021 (248 (4). - pp. 58-61. 4. Galochkin V.A., Ernst L.K., Trindo L.I. et al. Immunobiotekhnologicheskiy podkhod k regulyatsii reproduktivnoy funktsii, obmena veshchestv i produktivnosti zhivotnykh [Immunobiotechnological approach to the regulation of reproductive function, metabolism and productivity of animals]. - Agrarian biology. - 1994 (2). -pp. 3-19. 5. Glotov A.G., Shulyak A.F., Glotova T.I., Sergeev A.N. Infektsionnyy rinotrakheit krupnogo rogatogo skota [Infectious bovine rhinotracheitis]. - 2006: 194 p. 6. Sisyagin P., Sisyagina E., Redzhepova G., Ubitina I. Povyshenie ustoychivosti telyat k smeshannym virusno-bakterialnym respiratornym infektsiyam [Increasing the resistance of calves to mixed viral-bacterial respiratory infections]. - Veterinariya selskokhozyaystvennykh zhivotnykh. - 2015 (12). - pp. 23-28. 7. Staroselov M.A. Otsenka sravnitelnoy effektivnosti immunokorrektorov dlya povysheniya rezistentnosti krupnogo rogatogo skota [Evaluation of the comparative efficiency of immunocorrectors for increasing the resistance of the large horned cattle]. - KubSAU. - 2008. 8. Fedorov Yu.N. Immunologicheskiy faktor kak prichina zheludochno-kishechnykh zabolevaniy u telyat [Immunological factor as a cause of gastrointestinal diseases in calves]. - 2000: 36-37. Author affiliation: Staroselov Mikhail A., Ph.D. in Veterinary Medicine, Head of the department of therapy and obstetrics of the Krasnodar Scientific Center for Animal Husbandry and Veterinary Medicine; 1, 1 Liniya st., Krasnodar, 350004; phone: 8-953-1122803; e-mail: knivitherapy@gmail.com - responsible for correspondence with the editorial board.
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