FIG. 5.

Colonization of bladders and kidneys of CBA/J mice infected with virulent UPEC CFT073 derivative strain QT1081 (Δlac) and transport mutant CFT073 derivatives in the single-strain infection model. The data are presented as the log CFU/gram of tissue. Each data point represents a tissue sample from an individual infected mouse 48 h postinfection. Both kidneys were sampled separately. Strains tested were the CFT073 ΔlacZYA strain QT1081 (Δlac), the QT1434 Δznu strain (Δznu), and the QT1555 Δznu ΔzupT strain (Δznu ΔzupT). Horizontal bars represent the median values of each group. Samples that were significantly decreased compared to the virulent Δlac strain are indicated with asterisks (*, P < 0.005). P values of comparative differences were determined by the Mann-Whitney test.