Table-2.

Correlation between the phenotypic and genotypic AR to penicillin, oxacillin and gentamicin in S. aureus.

Gene	Number of strains	Number of strains tested by E strip (MIC µg/ml)
		Sensitive	Intermediate	Resistant
blaZ		Penicillin MIC≤0.12	Penicillin MIC 0.12-0.25	Penicillin MIC≥0.25
Positive	34	0	0	34
Negative	3	2	1
mecA		Oxacillin MIC≤2	Oxacillin MIC 2-4	Oxacillin MIC≥4
Positive	0	0	0	0
Negative	37	33	0	4
aacA-aphD		Gentamicin MIC≤4	Gentamicin MIC 8	Gentamicin MIC≥16
Positive	15	10	0	5
Negative	22	22	0	0

S. aureus=Staphylococcus aureus, MIC=Minimal inhibitory concentration, AR=Antibiotic resistance