A retrospective review of antimicrobial susceptibility testing of 134 bacterial isolates to fluoroquinolones, which are the most common in pigs, 74 isolates of cattle respiratory pathogens, and 101 isolates of causative agents of cattle mastitis isolated at FSBE «ARRIAH». The testing was held on animals from different age groups since 2014 to 2019. The causative agents of respiratory diseases in pigs P. multocida, A. pleuropleumoniae, H. parasuis showed high sensitivity to marbofloxacin, and therefore it can be recommended for the treatment of respiratory infections of pigs. The causative agents of cattle respiratory diseases also demonstrate high susceptibility to marbofloxacin, and can be recommended for the treatment of bacterial infections in cattle.

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A retrospective review of antimicrobial susceptibility to the fluoroquinolones and potentiated sulfonamides of 120 isolates of the most typical porcine bacterial pathogens isolated from animals of different age groups from 2009 to 2019 at FGBI «ARRIAH» was carried out. According to the results, P. multocida, H. parasuis are highly susceptible to enrofloxacin, which can be used for empirical treatment of pasteurellosis and Glasser's disease. A. pleuropneumoniae and S. suis are also susceptible to enrofloxacin, so it can be recommended for the treatment of A. pleuropneumonia and streptococcosis. 50% of isolates of S. suis isolated from the brain tissues are susceptible to the potentiated sulfonamides, so this medication can be recommended for the treatment of streptococcosis only after susceptibility testing.