Typhimurium cultivated from liver (P < 0.05), spleen (P < 0.05) and mesenteric lymph nodes (P < 0.05) five days post challenge was established (Figure 2C), although the increase in CD4+ T cells in infected mice was not significant. Figure 2 Prevalence and linear correlations of immune cells in spleen after Salmonella challenge. A: The percentages of neutrophils and CD4+ T cells within the spleen of infected versus non-infected mice. * P < 0.05; **P < 0.01. Linear correlations between numbers of cultivated Salmonella from spleen, liver and mesenteric lymph nodes and prevalence of B: neutrophils and C: CD4+ T Torin 2 in vitro cells. In vitro fermentation

study By in vitro fermentation using monocultures of S. Typhimurium, this strain was seen to utilise FOS (P < 0.01), beta-glucan (P < 0.05) and GOS (P < 0.001), but not XOS,

Inulin, apple pectin or polydextrose. In accordance with these results, a lowering of the culture pH was seen after fermentation with FOS (P < 0.01), beta-glucan (P < 0.001), and GOS (P < 0.001). A significant decrease in the pH was also recorded in the culture with polydextrose (P < 0.001) even though this carbohydrate was not found to support growth of the Salmonella strain (data not shown). Discussion In the present study we report for the first time that changes in the carbohydrate composition of the diet impair the resistance of BALB/c mice to severe S. Typhimurium SL1344 challenge. Mice fed with

a diet containing 10% FOS or XOS Pifithrin-�� datasheet had 3-mercaptopyruvate sulfurtransferase significantly higher numbers of S. Typhimurium in liver (P = 0.006 and P = 0.023, respectively), spleen (P = 0.010 and P = 0.025, respectively) and mesenteric lymph nodes (P = 0.009 and P = 0.017, respectively) when compared to mice fed with the control diet. Additionally, a similar trend was observed for the mice fed with apple pectin, which also had elevated numbers of Salmonella in liver (P = 0.154) and spleen (P = 0.198). The haptoglobin concentrations seen in the infected mice quite closely correlated with the degree of translocation of Salmonella, scored as the numbers of CFU of Salmonella in liver, spleen and mesenteric lymph nodes in the dietary groups of each of the three experiments. Thus in Study A, the significantly increased number of Salmonella in the organs of the FOS and XOS groups compared to the group fed the control diet (Figure 1) correlated with haptoglobin concentrations that were significantly increased in the same groups compared to the control group (Table 2). In Study B and C, no statistically significant differences after infection were detected in either haptoglobin concentration or organ counts between the dietary groups and the control group of each experiments.