title: Nonbacterial and unusual pneumonias in the elderly.
mesh_terms: D000368:Aged; D000900:Anti-Bacterial Agents / Q000627:therapeutic use*; D006801:Humans; D007114:Immunization; D007251:Influenza, Human / Q000503:physiopathology; D007877:Legionnaires' Disease / Q000175:diagnosis / Q000188:drug therapy / Q000503:physiopathology; D008875:Middle Aged; D011014:Pneumonia / Q000188:drug therapy / Q000382:microbiology* / Q000503:physiopathology / Q000517:prevention & control; D009956:Psittacosis / Q000188:drug therapy / Q000503:physiopathology / Q000635:transmission; D012621:Seasons
chemical_list: D000900:Anti-Bacterial Agents