FIG. 1.

IgG response to Y. pestis antigens in mice surviving pneumonic plague. Each graph represents a separate antigen tested against individual serum samples from 12 mice treated with ofloxacin starting 42 h postchallenge. The IgG ELISA titers are the geometric mean reciprocal endpoint dilutions from three separate assays. Note differences in the scale of the abscissa. No data shown indicates that the mean for that sample was less than twofold different from normal mouse serum tested with the same antigen.