Chlamydophila InfectionsChlamydophila pneumoniaeChlamydia InfectionsChlamydiaChlamydia trachomatisMycoplasma pneumoniaeKlebsiella pneumoniaeStreptococcus pneumoniaeAntibodies, BacterialChlamydophila psittaciPneumonia, BacterialPneumonia, MycoplasmaSerologyAzithromycinDNA, BacterialSerologic TestsPolymerase Chain ReactionImmunoglobulin GImmunoglobulin AChlamydia muridarumAnti-Bacterial AgentsArteriosclerosisChaperonin 60PsittacosisKlebsiella InfectionsAntigens, BacterialPneumococcal InfectionsSeroepidemiologic StudiesBacterial ProteinsBacterial Outer Membrane ProteinsPhascolarctidaeMicrobial Sensitivity TestsRespiratory Tract InfectionsChlamydiaceae InfectionsRoxithromycinNasopharynxLymphogranuloma VenereumChlamydiaceaeChlamydial Pneumonia