IL1B and infection: Therefore, the levels of human and murine MCP-1, IL-1β, IL-6, IL-10, IL-17A, IFN-γ and TNF-α in the blood and the infected thigh muscle were measured at days 2 and 7 p.i. The levels of all tested signaling molecules was in general lower in the blood than at the site of infection (Figure 4).