TABLE 1.

Inter- and intralaboratory comparisons of retapamulin MIC results^a

MIC (μg/ml)	No. of occurrences of organism in laboratory:
	A	B	C	D	E	F	G	H	Total
S. aureus ATCC 29213
0.03									0
0.06	14			2	16	7		1	40b
0.12	26	40	40	38	24	33	38	39	278b
0.25							2		2b
0.5									0
S. pneumoniae ATCC 49619
0.03									0
0.06	1								1c
0.12	31	1	35	10	19	20	9	30	155c
0.25	8	32	5	30	21	1	30	10	137c
0.5		7				19	1		27c
1									0

^aResults represent testing of two QC strains for an eight-medical-center protocol meeting the study design guidelines found in CLSI M23-A2 (4).

^bOne hundred percent of qualifying laboratory results were within the proposed QC range (0.06 to 0.25 μg/ml).

^cOne hundred percent of qualifying laboratory results were within the proposed QC range (0.06 to 0.5 μg/ml).