IL27 and infection: To determine whether IL-27 contribute to the infection outcome, we neutralized IL-27 in BALB/c and administered rIL-27 to C57BL/6 mice 24 h after infection, coinciding with the IL-27p28 RNA peak in the spleen and before the IL-27 increase observed in the serum, 2 days after the infection, in BALB/c mice.