FIG. 1.

Recovery of viable E. faecalis and E. coli DH5α from infected murine peritoneal macrophages at 6, 24, 48, and 72 h postinfection. E. faecalis strains were passaged through serum, while E. coli DH5α was grown in LB broth prior to infection. The results represent the mean and standard error of three experiments. In some cases, the standard error is not indicated, because it is too small to be visible on the graph. Symbols: ○, E. faecalis FA2-2(pAM714); ▴, E. faecalis FA2-2(pAM771); □, E. coli DH5α; ⧫, E. faecalis 418.