FIG 9.

S. Pullorum infection suppresses inflammatory responses in the cecal tonsils and spleens of infected chickens at various times (days) after oral infection. The mRNAs of proinflammatory chemokines (CXCLi1 and CXCLi2) and cytokines (IL-1β, IL-6, and iNOS) were detected in 3 chickens from one independent experiment, and the data are shown as fold changes in comparison to values for uninfected controls (shown as 1). + indicates differences in levels of cytokines induced by each serovar compared to uninfected controls (+, P < 0.05; ++, P < 0.01); * indicates differences between levels of cytokines induced by different serovars (*, P < 0.05; **, P < 0.01).