Scrub TyphusTyphus, Endemic Flea-BorneOrientia tsutsugamushiRickettsia typhiTyphus, Epidemic Louse-BorneSiphonapteraRickettsia InfectionsTrombiculidaeLaosRickettsiaRickettsia prowazekiiDoxycyclineAntibodies, BacterialRickettsia conoriiBoutonneuse FeverEctoparasitic InfestationsSikkimEarachePalauFluorescent Antibody Technique, IndirectImmunoglobulin MMitesThailandFeverRickettsial VaccinesOpossumsRickettsia felisRickettsieaeImmunochromatographyRodentiaSeroepidemiologic StudiesTunisiaTexasTaiwanImmunoglobulin GAntigens, BacterialMilitary FacilitiesPhthirapteraPolymerase Chain ReactionDisease Vectors