Pathogenesis: vasculitis Virulence factors endotoxin phospholipase A, and slime layer Sites: vascular system producing vasculitis 血管炎 Characteristic triad of symptoms fever, headache and rash(no rash with Q fever)Pathogenesis：vasculitis  Virulence factors: endotoxin, phospholipase A, and slime layer  Sites: vascular system producing vasculitis 血管炎  Characteristic triad of symptoms:  fever, headache and rash (no rash with Q fever)