FIG 8.

Anti-Bordetella IL-10 recall response following infection. PBMCs (A) and TBLN cells (B) were collected on days 28 and 56 postchallenge from pigs infected intranasally with KM22 or KM22ΔbscN or mock challenged with PBS. Cells were restimulated with heat-killed B. bronchiseptica KM22, and the supernatants were analyzed for IL-10 production by ELISA. IL-10 levels are presented as the means ± SD for 4 pigs per treatment group. A one-way analysis of variance with Tukey's posttest was used for statistical analysis, and P values less than 0.05 are indicated with connecting bars.