CNS expression of chemokine mRNAs involved in leukocyte trafficking. C57BL/6 mice were inoculated intracerebrally with 1,000 PFU of SINV. Brains and spinal cords were analyzed for the mRNAs of chemokines CCL1, CCL2, CCL3, and CCL5 (A and E), CXCL1 and CXCL2 (B and F), CXCL9 and CXCL10 (C and G), and CCL19, CXCL12, and CXCL13 (D and H). Each point is the mean ± SEM of three mice, except for CCL1 for which there are two mice for days 1 to 28. Relative levels were normalized to endogenous GAPDH mRNA expression.