K. pneumoniae CFU in the lung (A) and blood (B) of FP or vehicle-treated mice 48 hours after i.t. challenge. Mice receiving FP for 8 consecutive days prior to infection demonstrate significantly higher bacterial burdens in both compartments. n = 10 for each group. Lines indicate mean of each group. Results shown are from one of three separate experiments. * p < 0.05 vs. vehicle.