Figure 5From: Control of endemic swine flu persistence in farrow-to-finish pig farms: a stochastic metapopulation modeling assessment Boxplots representing the occurrence of co-infections in growing pigs (number of days with co-infected pigs/number of days with infected pigs) according to the batch-rearing system (4-, 5-, 7-, 10- or 20-BR system) (Kruskal–Wallis test, p < 0.001). Different letters indicate significant differences between BR systems (Wilcoxon rank sum test for pairwise comparisons).Back to article page