Table 2

Trends in MRSA strain distribution by yeara

Strain/clonal complexNo. (%) of isolatesP valueb
Total20062007200820092010
All strains0.029
CC22-MRSA IV151 (73)38 (62)35 (74)40 (82)25 (81)13 (81)0.019
CC30-MRSA II21 (10)9 (15)4 (9)4 (8)2 (6)1 (6)0.175
CC45-MRSA II16 (8)11 (18)4 (9)1 (2)0 (0)0 (0)<0.001
CC5-MRSA IV9 (4)3 (5)3 (6)2 (4)1 (3)0 (0)0.428
CC8/SM108/SM1223 (1)0 (0)0 (0)1 (2)2 (6)0 (0)0.113
NARES (not a recognized strain)0 (0)0 (0)1 (2)1 (2)1 (3)2(13)0.036
  • a Assignment of isolates to MLST clonal complexes was done as described in Materials and Methods.

  • b By Mantel-Haenszel test of linear association.