Antimicrobials tested included penicillin (PEN), amoxicillin (AMO), erythromycin (ERY), azithromycin (AZI), clarithromycin (CLA), midecamycin (MID), spiramycin (SPI), clindamycin (CLI), levofloxacin (LEV), vancomycin (VAN), rifampicin (RIF), tetracycline (TET) and co-trimoxazole (SXT).