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Legionella pneumophila Serogroup 9: A Cause of Human Pneumonia
- PAUL H. EDELSTEIN, M.D.;
- WILLIAM F. BIBB, M.S.;
- GEORGE W. GORMAN, B.S.;
- W. LANIER THACKER, M.S.;
- DON J. BRENNER, Ph.D.;
- HAZEL W. WILKINSON, Ph.D.;
- C. WAYNE MOSS, Ph.D.;
- RICHARD S. BUDDINGTON, M.D.;
- CHRISTOPHER J. DUNN, M.D.;
- PHILIP J. ROOS, M.D.; and
- PIETER L. MEENHORST, M.D.
- Los Angeles, California; Atlanta, Georgia; Abingdon, Virginia; Loma Linda, California; and Leiden, the Netherlands
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.
Article and Author Information
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▸From the Medical and Research Services, Veterans Administration Wadsworth Medical Center and University of California, Los Angeles, California; Center for Infectious Diseases, Centers for Disease Control, Atlanta, Georgia; Laboratory Service, Johnston Memorial Hospital, Abingdon, Virginia; Department of Medicine, Loma Linda University School of Medicine, Loma Linda, California; and Leiden University Hospital, Leiden, the Netherlands.
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Grant support: by the Medical Research Service of the Veterans Administration. Philip J. Roos is the recipient of Pulmonary Faculty Training Grant HL-536 from the National Heart, Lung, and Blood Institute.
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▸Requests for reprints should be addressed to Paul H. Edelstein, M.D.; Legionnaires' Disease Laboratory, Veterans Administration Medical Center, Wadsworth Division (691/111F2), Wilshire and Sawtelle Boulevards; Los Angeles, CA 90073.
