Antimicrobial resistance in staphylococci isolated from canine pyoderma

This study aimed to determine the frequency as well as the antimicrobial susceptibility profile of staphylococci isolated from canine pyoderma. The isolated strains were identified by biochemical. The coagulase positive specie S. pseudintermedius was the most prevalent (82.4%, 28/34), followed by coagulase negative species S.chromogenes (6.0%, 2/34), S. epidermidis (2.9%, 1/34), S. warneri (2.9%, 1/34), S. sciuri (2.9%, 1/34) and S. haemolyticus (2.9%, 1/34). High rates of resistance to lincomycin, ampicillin, penicillin G and tetracycline were observed, what is probably due to the frequent use of these antibiotics in veterinary practice. A 32.4% percentage of the strains has shown multi-drug resistance, including a S. pseudintermedius strain resistant to oxacillin. All strains were sensitive to gentamycin, amikacin, tobramycin, chloranphenicol, imipenem, cephalothin and vancomycin. These results indicate the occurrence of resistant staphylococci associated with canine pyoderma and point to the need of careful selection of antibiotics based on results of the susceptibility testing, in order to reduce the selection of multiresistant strains.