EN
The aim of this study was to characterize clinical isolates of S. aureus. A total of 20 strains were characterized by coagulase activity, presence of the clumping factor, mannitol fermentation, fibrinolysin production in human and bovine plasma, hemolysis of sheep erythrocytes, egg yolk reaction, tellurite reduction, phosphatase production, growth with crystal violet. The isolates were tested for antibiotic resistance. The antibiotic disks used were penicillin, amoxycillin, cefalexin, gentamicin, lincomicin, enrofloxacin, erythromycin, bacitracin and tetracycline. In this study total strains were classified into 4 biotypes based on acid production from mannitol, mannose and ribose. The strains were tested for induction to L forms with a variety of antibiotics to determine the ease of induction for different strains. The strains of S. aureus were tested used PCR — fingerprinting.