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Serum antibody to whole cells of B. hermsii by enzyme-linked immunosorbent assay (ELISA) over time in infected mice. The experiment and blood collection protocol are the same as described for Figure 3. Panel (A) is a scatter plot of log-transformed reciprocal titer values for individual mice against time in hours after inoculation; Panel (B) shows pairs of values for nine individual mice obtained 7.5 h apart and denoted by different colors and symbols as given in the figure.
