Figure 4.

Colonization of the whole cecum and cecal contents by ATCC14028 and ΔinvA mutants. Recovery of wild type serotype Typhimurium ATCC14028 and ΔinvA mutant in the whole cecum (tissue + contents) of chicks (A) and mice (B) and in the isolated cecal contents of chicks (C) and mice (D) is shown as the mean log ratio of wild type versus mutant and error bars denote standard error. Asterisks indicate a significant difference relative to the ratio of wild type vs. mutant in the inoculum, at P < 0.05.