TABLE 2.

Prevalence of six PMQR determinants

Year	Species	Total no. of isolates	No. of isolates positive for:							No. of isolates with any PMQR gene (%)
			qnrA	qnrB	qnrC	qnrS	aac(6′)-Ib	aac(6′)-Ib-cr	qepA
1998	E. coli	36					1			0
	K. pneumoniae	22		2			4			2
	E. cloacae	12		3			3			3
	Total	70		5			8	0		5 (7.1)
1999	E. coli	40								0
	K. pneumoniae	18		1			2			1
	E. cloacae	10		2			4			2
	Total	68		3			6	0		3 (4.4)
2000	E. coli	40		1			4	2		3
	K. pneumoniae	21					2			0
	E. cloacae	12		1			5			1
	Total	73		2			11	2		4 (5.5)
2001	E. coli	35				1	4	1		2
	K. pneumoniae	18					2	2		2
	E. cloacae	10		3			3			3
	Total	63		3		1	9	3		7 (11.1)
2005	E. coli	54					2	1	1	2
	K. pneumoniae	29		4			5	1		5
	E. cloacae	11		2			4			2
	Total	94		6			11	2	1	9 (9.6)
2006	E. coli	56		3		1	4	2		6
	K. pneumoniae	27		0		2	2	1		3
	E. cloacae	10		0		0				0
	Total	93		3		3	6	3		9 (9.7)
Total	E. coli	261		4		2	15	6	1	13 (5.0)
	K. pneumoniae	135		7		2	27	4		13 (9.6)
	E. cloacae	65		11			19	0		11 (16.9)
	Total	461		22		4	51	10	1	37 (8.0)