When we compared pre-infection plasma concentrations of RANTES, MCP-1, and sCD137 to necropsy plasma concentrations using the Wilcoxon matched-pairs signed-rank test, we found that MCP-1 and sCD137 both increased significantly during infection (MCP-1, p < 0.001; sCD137, p < 0.01). Here, CCL5 is linked to infection.