The phenotypic pattern of antibiotic resistance of S. aureus bacteria was investigated using the disk diffusion method on Mueller–Hinton agar (Merck, Germany).13 (link) Principles of the Clinical Laboratory Standard Institute (CLSI) were used for this purpose.14 Diverse kinds of antibiotic agents including aminoglycosides (amikacin (30 µg/disk) and gentamicin (10 µg/disk)), fluoroquinolones (levofloxacin (5 µg/disk) and ciprofloxacin (5 µg/disk)), lincosamides (clindamycin (2 µg/disk)), macrolides (erythromycin (15 µg/disk) and azithromycin (15 µg/disk)), penicillins (penicillin (10 µg/disk)), tetracyclines (doxycycline (30 µg/disk) and tetracycline (30 µg/disk)), phenicols (chloramphenicol (30 µg/disk)), folate pathway inhibitors (trimethoprimsulfamethoxazole (25 µg/disk)), and ansamycins (rifampin (5 µg/disk)) were used for this goal (Oxoid, UK). The method was completed using the protocol characterized previously.14
S. aureus (ATCC 43300 and ATCC 29213) was used as the quality control organism in antimicrobial susceptibility determination.