Table 1.

Susceptibility of clinical isolates of enterococci used in this study to opsonic killing mediated by rabbit antiserum toE. faecalis 12030

StrainSourcea% of bacteria killed by antisera to strain 12030b
E. faecalis
 12030Cleveland, Ohio, VA96
 12107Cleveland, Ohio, VA37
 9693Cleveland, Ohio, VA0
 JH2-2Laboratory strain0
Vancomycin-resistant E. faecium
  • a VA, Veterans Administration Hospital (courtesy of David Shlaes); CH, Children’s Hospital, Boston, Mass.; BIDMC, Beth Israel Deaconess Medical Center, Boston, Mass.; BWH, Brigham and Women’s Hospital, Boston, Mass. Note that BIDMC and BWH isolates were all distinct by pulsed-field gel electrophoresis analysis.

  • b Killing of >45% is significant at P ≤ 0.05 by t test comparing CFU surviving in immune sera with CFU surviving in nonimmune sera (significant results shown in boldface type).