Survival of <i>B. pertussis</i> and <i>B. parapertussis</i> in the presence of serum from non-immune or BPZE1-immunized mice.

<p>300 CFU of <i>B. pertussis</i> (<b>a</b>) and <i>B. parapertussis</i> (<b>b</b>) were incubated at 37°C for 1 h in the presence of 100 µl of 80% serum from unimmunized (Naïve) or BPZE1-immunized (BPZE1) mice and then plated onto Bordet Gengou blood agar plates for CFU counting. The results are presented as percent survival relative to that of a PBS control (in the absence of serum) (± standard error) for 3 mice per group, evaluated on 3 different plates per mouse, and are representative of three independent experiments.