FIG. 3.
Fecal excretion of Salmonella serovar Typhimurium. Rats were orally inoculated with 108 CFU of serovar Typhimurium, and the number of bacteria present in a pool of fecal pellets collected daily was measured by plating. Data are expressed as means ± SD of results from four to six rats per group. In all groups, the number of bacteria significantly increased by day 4 and gradually decreased by day 9 after inoculation. No statistical differences were observed in daily bacteria numbers between groups. The statistical evaluation was performed with analysis of variance applying the Bonferroni correction.