title: An unusual cause of bacterial meningitis in the elderly. Propionibacterium acnes.
mesh_terms: D000368:Aged; D001424:Bacterial Infections / Q000503:physiopathology; D006801:Humans; D008297:Male; D008581:Meningitis / Q000209:etiology* / Q000503:physiopathology; D011425:Propionibacterium acnes