Ricke, rick, rickettsia type biological agent, Rickettsiae like guinea pig agent, rickettsia tsutsugamushi infection, Rickettsia megawi var. fletcheri, Rickettsia prowazekii var.mooseri, Rick found a sure-enough nickel., rickettsial-interference phenomenon, Rickettsialpox due to Rickettsia akari, Rickettsia orientalis Rickettsia nipponica 返回 ricksha