TABLE 3

Performances of cefoxitin DD and BMD testing for detection of mecA-mediated oxacillin resistance in S. schleiferi

BreakpointsSummaryBD mediumHardy mediumRemel mediumDifco CA-MHBBD CA-MHBOxoid CA-MHB
CA (%)No. of errors/no. of isolates (%)CA (%)No. of errors/no. of isolates (%)CA (%)No. of errors/no. of isolates (%)CA (%)aNo. of errors/no. of isolates (%)CA (%)No. of errors/no. of isolates (%)CA (%)No. of errors/no. of isolates (%)CA (%)No. of errors/no. of isolates (%)
VMEsMEsVMEsMEsVMEsMEsVMEsMEsaVMEsMEsVMEsMEsVMEsMEs
CLSI M100-S27 DD breakpoints
    S. aureus/S. lugdunensis8563/87 (72)0/166 (0)7820/29 (69)0/61 (0)7622/29 (76)0/61 (0)7121/29 (72)0/44 (0)
    CoNS staphylococci (except for S. lugdunensis and S. pseudintermedius)7556/87 (64)0/166 (0)8117/29 (59)0/61 (0)7721/29 (72)0/61 (0)7518/29 (62)0/44 (0)
CLSI M100-S27 MIC breakpoints
    S. aureus/S. lugdunensis8152/87 (60)0/183 (0)8112/29 (41)0/61 (0)8112/29 (41)0/61 (0)8011/29 (38)0/61 (0)
  • a We were unable to read zones for 17 mecA-negative isolates due to poor growth; these were not included in the denominator.