TNF and infection: Levels of CXCL1/KC (Figure 6D), IFN-γ (Figure 6E), TNF-α (Figure 6F), and IL-10 (Figure 6G) in the lung 1, 7, 15 and 30 days post-infection were significantly higher (approximately 30%, 40%, 19% and 36%, respectively) (p<0.05) in mice infected with the L27/01 strain, particularly 1 to 7 days post-infection.