TABLE 2.

Bacterial killing by ICR-strain mouse serum

Bacterial strainInitial inoculum (103 CFU/100μl of NMS)Bacterial content after incubationa (103 CFU/100 μl of NMS)
15 min30 min60 min
Wild type2.02.4 ± 0.23.7 ± 0.47.1 ± 0.2
O-antigen-deficient mutant1.62.4 ± 0.94.2 ± 0.36.8 ± 0.5
  • a Results are the means and standard deviations of three experiments each. Statistical comparisons between the wild type and the O-antigen-deficient mutant revealed no significant differences at any time point. n = 3 per group.