Antigenic structure ■LPs Rickettsia tsutsugamushi Coxiella burneti(Q fever) LPS I smooth LPSI rough Weil-Felix reacrion a Surface protein(SPA)Antigenic structure ◼ LPS Rickettsia tsutsugamushi Coxiella burnetii (Q fever) LPSⅠ smooth LPSⅡ rough Weil-Felix reacrion ◼ Surface protein(SPA)