title: Community acquired infectious pneumonia: etiology and initial antibiotic therapy. The changing bacteriology of pneumonia has affected the way antibiotics are used.
mesh_terms: D000367:Age Factors; D000900:Anti-Bacterial Agents / Q000627:therapeutic use*; D004359:Drug Therapy, Combination; D006801:Humans; D011014:Pneumonia / Q000188:drug therapy / Q000382:microbiology*; D012189:Retrospective Studies
chemical_list: D000900:Anti-Bacterial Agents