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Journal of Clinical Microbiology, August 1999, p. 2652-2655, Vol. 37, No. 8
0095-1137/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.

Single Clonal Origin of a High Proportion of Legionella pneumophila Serogroup 1 Isolates from Patients and the Environment in the Area of Paris, France, over a 10-Year Period

Christine Lawrence,1,* Monique Reyrolle,2 Sylvie Dubrou,3 Françoise Forey,2 Bénedicte Decludt,4 Claire Goulvestre,1 Peggy Matsiota-Bernard,1 Jerome Etienne,2 and Charles Nauciel1

Laboratoire de Microbiologie, Hôpital R. Poincaré, Garches,1 Centre National de Référence des Légionelles, EA 1655, Faculté de Médecine Laennec, Lyon,2 Laboratoire d'Hygiène de la Ville de Paris, Paris,3 and Institut de veille sanitaire, St Maurice,4 France

Received 15 January 1999/Returned for modification 12 March 1999/Accepted 18 May 1999

Arbitrarily primed PCR with three primers and pulsed-field gel electrophoresis were used to characterize a set of 75 clinical Legionella pneumophila serogroup 1 isolates, with no apparent epidemiological link, obtained from 24 hospitals in Paris, France, from 1987 to 1997. Unexpectedly, 25 clinical isolates from 15 hospitals had an identical profile (termed type A) by both methods. The same profile was subsequently found in 16 of 64 randomly selected environmental L. pneumophila serogroup 1 isolates from 15 different sites in the Paris area. There was no evidence of geographic clustering or a peak incidence of type A isolation. Type A has not been found in France outside the Paris area, suggesting that a particular type of L. pneumophila serogroup 1 is specifically present in the Paris water distribution network.

* Corresponding author. Mailing address: Laboratoire de Microbiologie, Hôpital R. Poincaré, 104 Bd. R. Poincaré, 92380 Garches, France. Phone: 33 1 47 10 79 48. Fax: 33 1 47 10 79 49. E-mail: christine.lawrence{at}rpc.ap-hop-paris.fr.

Journal of Clinical Microbiology, August 1999, p. 2652-2655, Vol. 37, No. 8
0095-1137/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.


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