Table 2.

Distribution of MICs of different antibiotics among S. aureus isolates (132 isolates)

Antibiotic	Break Point* µg/ml	MIC in µg/ml
		<0.25	0.5	1	2	4	8	16	32	64	128	256	512
β-lactams:
a. Penicillins:
Ampicillin	0.25	17	15	13	9	14	12	14	9	13	8	6	2
Amoxycillin	0.25	24	16	6	7	15	18	10	13	9	7	6	1
Oxacillin	2	18	35	32	15	7	8	5	6	2	2	1	1
b.Cephalosporins:
Cephalexin	16	2	3	5	7	5	8	16	28	19	23	12	4
Cefuroxime	8	3	5	6	8	13	11	17	24	20	14	8	3
Cefoperazone	16	5	5	6	3	21	1	12	14	23	14	7	0
Cefotaxime	8	2	2	6	12	24	22	14	6	28	17	12	1
Cefepime	8	17	28	13	12	3	8	12	23	11	0	0	0
β-lactam β-lactamase
inhibitor combinations:
Amp/Sul**	8	8	22	17	10	16	14	6	21	10	8	0	0
Amox/Clav**	4	10	15	17	21	26	19	12	8	4	0	0	0
Aminoglycosides:
Gentamicin	4	11	18	28	32	20	8	7	5	3	0	0	0
Amikacin	16	24	30	43	24	5	3	3	0	0	0	0	0
Fluoroquinolones:
Ciprofloxacin	1	22	18	35	23	14	7	6	4	3	0	0	0
Norfloxacin	4	10	3	22	6	26	27	16	10	9	3	0	0
Ofloxacin	1	24	21	32	23	16	9	5	1	1	0	0	0
Levofloxacin	1	33	42	20	26	5	3	3	0	0	0	0	0
Gatifloxacin	0.5	68	30	29	1	2	2	0	0	0	0	0	0
Macrolides: Erythromycin	0.5	20	9	12	14	16	25	14	8	6	5	2	1
Lincosamides: Clindamycin	0.5	36	30	21	9	6	10	8	5	4	2	1	0
Tetracyclines: Tetracycline	4	2	15	10	12	5	20	18	15	10	5	7	3
Glycopeptides: Vancomycin	4	21	20	29	25	17	8	10	2	0	0	0	0
Phenicols: Chloramphenicol	8	6	8	10	19	6	25	12	16	10	8	7	5
Ansamycins: Rifampicin	1	14	25	31	26	20	9	5	2	0	0	0	0

^aBreak points of different antibiotics according to CLSI (2005).