Table 1.

Bacterial strains used in this study

StrainComment(s)Reference or source
S. epidermidis M187Clinical isolate (peritonitis) 27
S. epidermidisM187-sn3PS/A-negative transposon mutant 27
S. epidermidis M187-sn6PS/A-negative transposon mutant 27
S. carnosus TM300Host strain 19
S. carnosus(pCN27) S. carnosus transformed with pCN27 containing the icalocus 12
S. carnosus(pCA44) S. carnosus transformed with pCA44 (control plasmid) 12
S. aureus RN4220 S. aureus recA-deficient strain 30
S. aureus(pSK265) S. aureus RN4220 transformed with pSK265This study
S. aureus(pCN27) S. aureusRN4220 with pCN27 containing the ica locusThis study
S. epidermidis RP62AATCC 35984; prototype PS/A-positive strain 5
S. epidermidis1457Prototype PIA-positive strain 25
S. epidermidis 1457-M11Isogenic biofilm and PIA-negative transposon mutant of S. epidermidis1457 25