Bartonella quintanaTrench FeverBartonellaBartonella InfectionsBartonella henselaePediculusAngiomatosis, BacillaryPhthirapteraCat-Scratch DiseaseHomeless PersonsGram-Negative BacteriaTyphus, Epidemic Louse-BorneArthropod VectorsBartonellaceaeBartonella bacilliformisLice InfestationsRickettsia felisBacteremiaEndocarditis, BacterialRickettsiaceaeDNA, BacterialGram-Negative Bacterial InfectionsGram-Positive BacteriaDNA, Ribosomal SpacerHeart ValvesAnti-Bacterial AgentsCoxiella burnetiiHeminRNA, Ribosomal, 16SAntibodies, BacterialSiphonapteraCatsPolymerase Chain ReactionCat DiseasesSequence Analysis, DNA