Interferon-gamma and tumor necrosis factor-alpha exert their antirickettsial effect via induction of synthesis of nitric oxide.


How the host defenses control rickettsiae in the cytosol of nonphagocytic host cells, where they are not exposed to antibodies or phagocytes, has posed a difficult question. Rickettsia conorii infection of a mouse fibroblast cell line was inhibited in a dose-dependent manner by nitrogen oxide synthesized by eukaryotic host cells stimulated by interferon… (More)


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