Any of various often fatal infectious diseases, such as typhus and Rocky Mountain spotted fever, characterized by skin eruptions and caused by rickettsia that are transmitted by ticks and mites.

• 斑疹伤寒：一种常致命的传染性疾病，如斑疹伤寒和落矶山斑疹热，其特征为皮肤破裂，由扁虱和壁虱传播的立克次氏体属微生物引起