Figure 5

Systemic infection ability of the WT and ∆ stdA SE strains. Bacterial counts in (A) liver and (B) spleen of chickens inoculated by oral crop gavage with 1 × 10⁷ CFU of WT and ∆stdA. There was no bacterial recovery at the 16 hour time point from either the liver or spleen of chickens inoculated with the WT or ∆stdA strain, so only the day 7 data is shown. The actual P values are given displaying a statistically significant difference between ∆stdA and the WT strain.