Mx immune staining 6 days post-challenge.

The Mx immune reactivity in the proximal and distal intestine was scored 0-5 with 5 being the most abundant reactivity (n = 3-6). The expression in enterocytes was separated from the expression in other cell types such as goblet cells and leucocytes, termed other. Statistical difference was accepted at p<0.05 as determined by Kruskal-Wallis non-parametric test followed by Bonferroni corrected Mann-Whitney U test to determine differences between groups.