Prevalence and Molecular Genetics of Methicillin-Resistant Staphylococcus aureus Colonization in Nursing Homes in Saudi Arabia

Table 1

Antibiotic resistant profile of MRSA isolates from elderly residents and nurses.

Antimicrobial agent	MIC range (μg/mL)	Resistant; (n = 17); n (%)	MRSA SCCmec types (n = 14)
			IVa; (n = 2); n (% R)	IVc; (n = 7); n (% R)	V; (n = 5); n (% R)
Benzylpenicillin	>= 0.5	17 (100)	2 (100)	7 (100)	5 (100)
Cloxacillin	>= 0.5	17 (100)	2 (100)	7 (100)	5 (100)
Oxacillin	0.25–4	17 (100)	2 (100)	7 (100)	5 (100)
Cefaclor	0.25–4	17 (100)	2 (100)	7 (100)	5 (100)
Gentamicin	0.50–16	8 (47.06)	1 (50)	4 (57.14)	1 (20)
Levofloxacin	0.12–8	3 (17.65)	0 (0.0)	1 (14.28)	1 (20)
Erythromycin	0.25–8	10 (58.82)	2 (100)	5 (71.43)	2 (40)
Clindamycin	0.25–8	9 (52.94)	1 (50)	5 (71.43)	2 (40)
Teicoplanin	0.50–32	1 (5.88)	0 (0.0)	0 (0.0)	0 (0.0)
Vancomycin	0.50–2	0 (0.0)	0 (0.0)	0 (0.0)	0 (0.0)
Tetracycline	1–16	1 (5.88)	1 (50)	0 (0.0)	0 (0.0)
Tigecycline	0.12–0.5	0 (0.0)	0 (0.0)	0 (0.0)	0 (0.0)
Fosfomycin	8–128	4 (23.52)	1 (50)	2 (28.57)	0 (0.0)
Linezolid	1–4	0 (0.0)	0 (0.0)	0 (0.0)	0 (0.0)