| rickettsial infections and fever, vientiane, laos. | rickettsial diseases have not been described previously from laos, but in a prospective study, acute rickettsial infection was identified as the cause of fever in 115 (27%) of 427 adults with negative blood cultures admitted to mahosot hospital in vientiane, laos. the organisms identified by serologic analysis were orientia tsutsugamushi (14.8%), rickettsia typhi (9.6%), and spotted fever group rickettsia (2.6% [8 r. helvetica, 1 r. felis, 1 r. conorii subsp. indica, and 1 rickettsia "at1"]). pa ... | 2006 | 16494751 |