TABLE 1.

Distribution of MRSA strains (n = 511) by PFGE, MLST, and SCCmec types and resistance genes from Belgium in 2003^a

PFGE group	PFGE type	No. of isolates	No. of hospitals	MLST type	ST	CC	SCCmec type	No. of isolates with:							Resistance profile (>50% of isolates)
								AME genes			Methylase genes		Tetracycline resistance genes
								aac(6′)-aph(2")	ant(4′)	aph(3′)	ermA	ermC	tetK	tetM
A	A1	12	12	3-3-1-12-4-4-16	247	8	I	9	6	1	10	0	0	8	ERY, CLI, CIP, GEN, TOB, KAN, TET, RIF
	A20	97	55	3-3-1-1-4-4-3	8	8	IV	3	93	0	88	3	0	4	ERY, CLI, CIP, TOB, KAN
	A21	27	13	3-3-1-1-4-4-3	8	8	IV	0	26	0	6	8	0	0	ERY, CIP, TOB, KAN
	Other	12	11					0	10	0	8	3	0	0
B	2	251	95	10-14-8-6-10-3-2	45	45	IV	1	19	0	4	97	4	0	CIP
	Other	18	15					0	5	0	5	4	0	0
C	C1	13	10	1-4-1-4-12-1-10	5c	5	II	0	13	0	12	2	0	0	ERY, CLI, CIP, TOB, KAN
	C3	12	6	1-4-1-4-12-1-10	5	5	IV	0	3	0	0	1	0	0	CIP
	Other	9	7					0	8	0	0	3	5	0
D	D8	11	9	1-4-1-4-12-24-29	228	5	I	10	3	8	10	1	0	0	ERY, CLI, CIP, GEN, TOB, KAN
G	G10	27	17	1-4-1-4-12-1-10	5	5	II	0	27	0	24	0	0	27	ERY, CLI, CIP, TOB, KAN, TET, MIN
	Other	4	4					0	4	0	4	0	0	3
L	L1	10	7	7-6-1-5-8-8-6	22	22	IV	0	0	0	0	7	0	0	ERY, CIP
	Other	1	1					0	0	0	0	0	0	0
Otherb		7	7					4	4	1	5	1	0	2

^aAbbreviations: ST, sequence type; CC, clonal complex; AME, aminoglycoside-modifying enzymes; ERY, erythromycin; CLI, clindamycin; CIP, ciprofloxacin; GEN, gentamicin; TOB, tobramycin; KAN, kanamycin; MIN, minocycline; TET, tetracycline; RIF, rifampin.

^bIncluding one isolate belonging to PFGE type J ST30-SCCmec IV.

^cIncluding two isolates of ST225 with a single locus variant of ST5.