УДК 619:618.19-002:637.115 DOI 10.33861/2071-8020-2023-5-10-11 Tselueva N. I., Gamayunov V. M Summary. Scientific materials on the study of the therapeutic efficacy of the drug ceftiofur hydrochloride, first used in the farms of Smolensk region for serous-catarrhal mastitis in lactating cows are presented in the article. The main role in the occurrence of mastitis belongs to bacterial microflora. Penetrating into the mammary gland, microorganisms multiply and cause its inflammation, this happens as a result of a decrease in the resistance of the breast and the immune reactivity of the body, while the development of the pathological process as a whole is complicated. In solving the problem of mastitis therapy, it is important to select and use new effective drugs that reduce the treatment time of cows and the use of milk with a minimum waiting period after the administration of medicines. The study of the therapeutic efficacy of a drug not previously used in the farm was carried out in two groups of 25 heads in each. The incidence of mastitis in the farm is quite significant - during 2022, 61.0% of animals had subclinical mastitis in the herd, 32.0% of animals had clinical mastitis. The cows of the experimental group of patients with mastitis were treated with ceftiofur hydrochloride 10 ml intramuscularly in the control group Mastivet was used. The results of the performed studies indicate a high therapeutic efficacy for the economy of the drug used for the first time. During the three-day course of treatment of cows with mastitis, it was 84.0% in the experimental group, which is 28.0% higher than the control group. Keywords: large horned cattle, cows, mammary gland, mastitis, serous-catarrhal mastitis, subclinical mastitis, therapy, ceftiofur hydrochloride, efficacy. References: 1. Gamayunov V. M., Tselueva N. I. Kolimast i multidzhekt v lechenii mastita u laktiruyushchikh korov [Colimast and multiject in the treatment of mastitis in lactating cows]. - International Bulletin of Veterinary Medicine. - 2018 (2). - pp. 41-45. 2. Gamayunov V.M. et al. Primenenie pri mastite triolakta u laktiruyushchikh korov [Use of triolact at mastitis in lactating cows]. -International Bulletin of Veterinary Medicine. - 2021 (2). - pp. 47-50. 3. Gamayunov V. M. Effektivnost mastinona u laktiruyushchikh korov [Mastinon efficacy in lactating cows]. - International Bulletin of Veterinary Medicine. - 2020 (4). - pp. 52-55. 4. Korennik I. V. Kompleksnyy podkhod k profilaktike i lecheniyu korov pri mastite [Comprehensive approach to the prevention and treatment of cows with mastitis]. - Veterinariya. - 2015 (8). - pp. 35-39. 5. Parikov V. A. et al. Mastit u korov (profilaktika i terapiya) [Mastitis in cows (prevention and therapy)]. - Veterinariya. - 2010 (11). - pp. 35-37. 6. Sermyagin A. A. et al. Morfologicheskiy sostav somaticheskikh kletok v moloke korov kak kriteriy otsenki zdorov’ya molochnoy zhelezy v svyazi s produktivnost’yu i komponentami moloka [Morphological composition of somatic cells in cow’s milk as a criterion for assessing breast health in connection with milk production and components]. - Journal of Agricultural Biology. - 2021 (6). - pp. 1183-1198. 7. Nikanova D. A. Novyy aspekt izucheniya biologicheski aktivnykh veshchestv i ikh kompleksnoe vliyanie na metabolicheskoe zdorovye, produktivnost i kachestvo moloka korov [New aspect of the study of biologically active substances of ITV and their complex effect on metabolic health, productivity and quality of cow milk]. - 2021. 8. Pudovkin D.N. Novoe v geneze mastita korov [New in the genesis of the mass of cows]. - Dairy and beef cattle breeding. - 2020 (3). -pp. 43-45. Author affiliation: Gamayunov Viktor M., Ph. D. in Biology, docent, leading specialist of the Laboratory of Zootechnology of the Federal Scientific Center for Bast Crops; 17/56, Komsomolsky ave., Tver, 170041, e-mail: info.sml@fnclk.ru. Responsible for correspondence with the editorial board: Tselueva Nadezhda I., Ph.D. in Veterinary Medicine, leading specialist of the Laboratory of Zootechnology of the Federal Scientific Center for Bast Crops; 17/56, Komsomolsky ave., Tver, 170041; phone: 8-4812-640862; e-mail: Zelyeva_smolensk@mail.ru.
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