Fig 1.

Colonization of BALB/c mice infected intragastrically with Y. enterocolitica. Mice were infected with 5.5 × 10⁸ to 8 × 10⁸ CFU of the wild-type (●) or ΔyaxAB (▲) strain. At the indicated time points, animals were sacrificed and tissues were harvested to determine the colonization of the mesenteric lymph nodes (A) or spleen (B). Each symbol represents one mouse, an X indicates a dead mouse, black bars are the median numbers of CFU recovered per gram of tissue, and dashed lines are set at the limit of detection. Data are from three independent experiments.