Rickettsia typhiRickettsia prowazekiiTyphus, Epidemic Louse-BorneTyphus, Endemic Flea-BorneRickettsiaScrub TyphusOrientia tsutsugamushiRickettsia InfectionsRickettsia felisRickettsia rickettsiiSiphonapteraSalmonella typhiRickettsia conoriiRickettsiaceaeAntibodies, BacterialEndemic DiseasesBoutonneuse FeverRocky Mountain Spotted FeverTyphoid FeverBartonellaAntigens, BacterialSeroepidemiologic StudiesTicks