CXCL1 and infection: The list of genes with the greatest induction following Mtb:Δ-sigH infection at this time-point included CXCL1 (120-fold), PTGS2 (100-fold), CXCL6 (75-fold), CCL2 (53-fold), CXCL3 (40-fold), CXCL1 (43-fold) and CCL2 (38-fold) CCL5 (35-fold).