CXCL8 and infection: As shown inFigures 1(a) and 1(b), CXCL-8 mRNA and CXCL-10mRNA were expressed after infection with M. bovis BCG,and IL-4 reduced gene expression of CXCL-8 in M. bovisBCG-infected HEp-2 cells (Figure 1(a)) but not CXCL-10gene expression (Figure 1(b)).