Table 1.

Distribution of ermB and mef Among Macrolide-Resistant Isolates Pre- and Post-PCV7 Introduction

Year	ermB + (%)	ermB + /mef + (%)	mef + (%)	ermB− /mef− (%)	Total
1999	120 (15.6)	20 (2.6)	615 (80.2)	12 (1.6)	767
2002	106 (20.6)	29 (5.6)	376 (73.0)	4 (0.8)	515
2003	76 (14.1)	37 (6.9)	421 (78.3)	4 (0.7)	538
2004	95 (18.1)	71 (13.5)	356 (67.9)	2 (0.4)	524
2005	123 (18.1)	133 (19.6)	420 (61.7)	3 (0.6)	679
2006	139 (18.7)	173 (23.3)	422 (56.9)	8 (1.1)	742
2007	150 (19.5)	221 (28.7)	395 (51.3)	4 (0.5)	770