TABLE 6.

β-Lactamase activities of the penicillinase-producing MRSA at different incubation times

Incubation period (h)	β-Lactamase activity (mean A482 ± SD)
	Control	Vancomycin	Amoxicillin	Co-amoxiclav
0–0.5	0.154 ± 0.005	0.143 ± 0.004	0.146 ± 0.002	0.133 ± 0.009a,b
0.5–2	0.178 ± 0.005	0.139 ± 0.007a	0.134 ± 0.008a	0.119 ± 0.004a,c
2–3	0.203 ± 0.005	0.132 ± 0.007a	0.160 ± 0.009a,d	0.118 ± 0.008a,b
3–6	0.307 ± 0.006	0.116 ± 0.008a	0.178 ± 0.001a,d	0.114 ± 0.002a,b
6–8	0.434 ± 0.006	0.106 ± 0.004a	0.301 ± 0.011a,d	0.109 ± 0.001a,b

^aStatistically significant versus control. 

^bStatistically significant (co-amoxiclav versus amoxicillin). 

^cStatistically significant (co-amoxiclav versus vancomycin). 

^dStatistically significant (amoxicillin versus vancomycin).