CCL2 and infection: The peak of blood MO was associated with a peak of secretion of several inflammatory cytokines such as IL-12p70 (342 ± 520 pg/ml on day 7 post-infection vs 33 ± 6.5 pg/ml on day -1 before infection), IFNγ (290 ± 215 pg/ml on day 7 vs 5 ± 2.2 pg/ml on day -1) and TNFα (155 ± 53 pg/ml on day 7 vs 53 ± 26 pg/ml on day -1) or chemokine such as MCP-1 (from 355 ± 290 pg/ml on day -1 to 960 ± 480 pg/ml on day 7 post-infection) (P < 0.009).