title: Legionella pneumophila serogroup 9: a cause of human pneumonia.
abstract: A new serogroup of Legionella pneumophila was isolated from bronchoscopic washings and an open-lung biopsy specimen of a patient from California with pneumonia. A serologically identical isolate was obtained from tap water of a hospital ward in the Netherlands, and a fatal case of pneumonia in a patient from Virginia was shown retrospectively to have been caused by this new organism. The type strain of what is now serogroup 9 of L. pneumophila is IN-23-G1-C2 (American Type Culture Collection no. 35289). Disease caused by L. pneumophila serogroup 9 is not apparently different from that caused by other L. pneumophila serogroups.
mesh_terms: D000372:Agglutination Tests; D001424:Bacterial Infections / Q000382:microbiology*; D001431:Bacteriological Techniques; D005260:Female; D005455:Fluorescent Antibody Technique; D006801:Humans; D007875:Legionella / Q000145:classification* / Q000302:isolation & purification; D007877:Legionnaires' Disease / Q000382:microbiology; D008297:Male; D008875:Middle Aged; D011014:Pneumonia / Q000382:microbiology*; D012703:Serotyping; D014871:Water Microbiology