Macrophages/activated microglia in the brain of TMEV-infected mice with and without the elevation of peripheral IL-6. Quantification of macrophages/activated microglia (CD45hi CD11b+, R2) isolated, on day 3 post TMEV-DA infection (3 × 105 pfu), from the brains of either C57BL/6J mice, C57BL/6J mice treated with recombinant IL-6 (rIL-6), IL-6KO mice or IL-6KO mice treated with rIL-6. Data represents the mean + SEM with 3 mice per group