CCL2 and infection: Interleukin 6 (IL-6), interleukin 10 (IL-10), and monocyte chemoattractant protein 1 (MCP-1) were induced by infection of both the wild type and complemented strains; however, they were present at significantly lower concentrations in the lungs of mice infected with the dnj1∆ mutant (Figure 9C).