Table 2.

Vancomycin MIC results using Broth microdilution and vancomycin screening agar for detection of MRSA with reduced susceptibility to vancomycin

		Vancomycin screening agar MIC
	BMD MIC	No growth (< 2 μg/ml) with and without casein	> 2 μg/ml (< 4 μg/ml)		> 4 μg/ml-< 6 μg/ml		> 6 μg/ml
			With casein*	Without casein	With* casein	Without* casein	With* casein	Without* casein
Sensitive	MIC ≤ 1	52	11	10 + 1•	0	0	7	7
	MIC 2	0	6	6*	0	0	2	2
Interme-diate	MIC 4	0	0	0	1	0	7	7
	MIC 8	0	0	0	0	0	14	14
Total		52	17	16 + 1•	1	0	30	30

^*No difference between 24 and 48 hours;

^•the Only one showed no growth at 24 hours but detected at 48h.