TABLE 1.

MRSA isolates (n = 114) used to determine whether the Xpert MRSA kit could detect all strains of MRSA prevalent in Ireland

MLST (no. of isolates)SCCmec typebAR type (no. of isolates)c
ST5d (10)II07.3d (3); 07.4 (5); 11 (2)
ST5 (1)IVUnfamiliare (1)
ST8f (11)IV or IVv43 (8); Unfamiliare (3f)
ST8 (26)II or IIv13 (7); 14 (15); New03 (3); 05 (1)
ST12 (1)IVNT (1)
ST22 (14)IV06 (13); NT (1)
ST30 (2)IVNT (2)
ST34 (1)IVNT (1)
ST36 (3)II07.0 (2); 07.2 (1)
ST45 (1)IVNT (1)
ST239 (13)III or IIIv01 (4); 09 (3); 15 (2); 44 (3); 23 (1)
ST247 (3)IA22 (2); New02 (1)
ST250 (4)I or Iv02 (4)
a (6)07 (2); New02 (1); 06 (1); SCV (2)
— (18)PVL-positive community-acquired MRSA (18)
  • a —, not done.

  • b “v” suffixes indicate previously reported variants of SCCmec types (14, 18).

  • c Antibiogram-resistogram (AR) types were determined from the patterns of resistance obtained when isolates were tested by disk diffusion against a panel of 23 antimicrobials as described previously (17). NT indicates AR patterns that were designated “no type” pending the results of DNA macrorestriction digestion analysis; PVL, Panton-Valentine leucocidin; SCV, small-colony variant.

  • d One isolate was a double-locus variant of ST5.

  • e Unfamiliar AR pattern.

  • f Two isolates were single-locus variants of ST8.