Rickettsia typhiTyphus, Endemic Flea-BorneRickettsiaRickettsia prowazekiiRickettsia InfectionsRickettsia felisSalmonella typhiRickettsia rickettsiiSiphonapteraTyphus, Epidemic Louse-BorneRickettsia conoriiOrientia tsutsugamushiRickettsiaceaeAntibodies, BacterialRocky Mountain Spotted FeverScrub TyphusBartonellaTyphoid FeverBoutonneuse FeverAntigens, BacterialSeroepidemiologic StudiesTicks