[Protective immunity against intracellular parasitic bacteria].

Facultative intracellular bacteria are resistant to the killing mechanism inside macrophages by virtue of various escape mechanisms. Activation of macrophages by cytokines is the key event to overcome of bacterial escape in macrophages of the infected host. Generation of TH1 type of antigen-specific T cell is the essentially required for the macrophage activation. This short review summarizes the escape mechanism of activated macrophages and the mechanisms involved in the generation of TH1 cells.