Identification of Staphylococci Isolated from Chickens and the Determination of Their Susceptibility to Some Antibiotics


Abstract: In this study, a total of 120 staphylococci strains, 46 coagulase positive and 74 coagulase negative, isolated from chickens were identified according to the characteristics of their cultural, biochemical and some antibiotic properties. The coagulase positive staphylococci consisted of 28 S. aureus, 9 S. delphini, 3 S. intermedius, 2 S. aureus subsp. anaerobicus, 1 S. schleiferi subsp. coagulans, 1 S. hyicus, and 2 unidentified strains. The coagulase negative staphylococci were identified as 16 S. simulans, 11 S. hyicus, 8 S. saprophyticus, 6 S. epidermidis, 4 S. schleiferi subsp. schleiferi, 4 S. arlettae, 4 S. lentus, 4 S. gallinarum, 3 S. chromogenes, 3 S. warneri, 3 S. haemolyticus, 2 S. caprae, 2 S. auricularis, 2 S. xylosus and 2 S. cohnii. These staphylococci strains were measured for susceptibility to erythromycin (15 µg), tetracycline (30 µg), oxytetracycline (30 µg), lincospectin (10 µg), ampicillin (10 µg), amoxicillin (25 µg), danofloxacin (5 µg), cotrimoxasole (25 µg), gentamicin (10 µg), cefuroxime (30 µg), neomycin (30 µg) and furazolidone (200 µg). As a result, we came to the conclusion that staphylococci isolated from chickens may represent different strains, and that the resistance of strains to some antibiotics may vary. However, in general, furazolidone, neomycin and cefuroxime were considered to be antibiotics which should have priority for treatment.

Keywords: Staphylococcus, identification, antibiotic susceptibility

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