Table 1.

Properties of the S. epidermidis strains used in this study

StrainPulse typeResistanceamecIEOP (10−5) with oxacillinOxacillin MIC (μg/ml)b
20 μg/ml100 μg/mlNo inductionInductionc
SE12ITetr +1,3003001664
SE20IITetr +328128
SE20ΔmecI IITetrMinr 86128512
SE22IIIGenr +367864256
SE42IV+428256
SE42ΔmecI IVTetrMinr 75128NDd
SE43VTetr +680218
SE53VIaGenrChlr +0.80.41128
SE53ΔmecI VIaGenr ChlrTetr Minr 0.40.4128256
SE54VIbGenr +90.764128
SE24VIcGenr ChlrEryr +1,800654256
SE34VIIGenr ChlrEryr +27432
SE65VIIITetrEryr +153128256
SE1IXaEryr Ile66→Asn10.6132
SE2IXbTetrEryr Ile66→Asn2,7006002128
SE13XChlrEryr +3,80012064128
SE33XIGenrEryr +2301964128
SE55XIITetrEryr +4,3001,00032128
SE60XIIITetrEryr +0.10.111
SE407XIVTetrEryr +1,7005454128
  • a Gen, gentamicin; Chl, chloramphenicol; Tet, tetracycline; Min, minocycline; Ery, erythromycin.

  • b MIC by broth dilution test.

  • c Bacteria were induced with 5 μg of CBAP per ml overnight before MIC determination.

  • d ND, not determined.