Roseolovirus InfectionsHerpesvirus 6, HumanPityriasis RoseaWuchereria bancroftiMicrofilariaElephantiasis, FilarialCytomegalovirusCytomegalovirus InfectionsAntibodies, BacterialImmunoglobulin GEnzyme-Linked Immunosorbent AssayPolymerase Chain ReactionLyme DiseaseImmunoglobulin MSerologic TestsAntibodies, ViralDNA, ViralHerpesviridae InfectionsHelicobacter InfectionsHelicobacter pyloriSensitivity and SpecificityAntigens, ViralAntigens, BacterialChronic DiseaseProspective StudiesTime FactorsPrevalenceRetrospective StudiesRNA, ViralCells, CulturedTreatment Outcome