Article 1 Atypical pneumonia 1 Chlamydia 1 Chlamydia spp DNA extraction 1 DNA isolation 1 Legionella pneumophila 1 Mycoplasma pneumoniae 1 PCR 1 RNA 16S 1 adult 1 agar gel electrophoresis 1 bacterium detection 1 community acquired pneumonia 1 cross-sectional study 1 enteropathogen 1 female 1 fluorescent dye 1 genomic DNA 1 genotype 1 hospitalization 1 human 1 macrophage 1 major clinical study 1 male 1 mixed infection 1 polymerase chain reaction 1 prevalence 1 primer DNA 1 priority journal 1