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There are a lot of factors facilitating antibiotic resistance in poultry farming, such as: genetic characteristics of microbiome, immune status of poultry, stress-producing technology of industrial poultry welfare, and the use of antibiotics with the purpose of disease prevention or medication. In both veterinary and animal-farming practice in the Russian Federation ansamycins, carbapenems, semisynthetic penicillins, cephallоsporins of different generations, fluroquinolones, macrolides and azalides, tetracyclines and glycopeptides are mainly used. Detection of the strains of pathogenic and opportunistic pathogenic microflora resistant to these antibiotics is considered to be important not only for veterinary but also for medicine. We have done the research on opportunistc microbiocenosis in poultry farms aimed at egg or meat farming located in the Ural area. It was stated that dominating strains in opportunistic pathogenic microflora are Enterococcus faecium and Pseudomonas aeruginosa, whereas S. aureus, S. epidermidis, S. saprophyticus, Ent faecalis, Enterobacter spp, P. vulgaris, P. mirabilis, E.coli are less frequently detected. Proportion of the above mentioned microorganisms differed depending on the profile of a poultry farm. The research done have shown that spreading of antibiotic resistant strains of opportunistic microflora in poultry farms have reached high level. The most of detected strains had low susceptibility or resistance at least to one target antibiotic. A significant number of P.aeruginosa and S.aureus strains not sensitive to carbapenems and fluroquinolones, as well as of E. faecium strains resistant to vancomycin, have been detected. Keywords— meat poultry farming, egg poultry farming, opportunistic pathogenic microflora, antibiotic susceptibility,

Composition and antibiotic susceptibility of opportunistic pathogenic microflora in poultry farms aimed at egg or meat farming