<i>B. pseudomallei</i> and <i>B. thailandensis</i> are resistant to direct complement-mediated killing.

<p><i>B. pseudomallei</i> 1026b, <i>B. thailandensis, B. pseudomallei</i> DD503, <i>B. pseudomallei</i> ΔCPS, <i>B. pseudomallei</i> ΔLPS and <i>E. coli</i> were incubated at the indicated serum concentrations at 37°C. At the indicated times, an aliquot of each sample was serially diluted and plated on TSA to determine CFU/ml. Each condition was assessed as duplicate samples in all experiments. * indicates a significant difference (<i>P</i>≤0.05) between <i>E. coli</i> and both <i>Burkholderia</i> species.