Outbreak of legionellosis suspected to be related to a whirlpool spa display, September 2006, Lorquin, France.

Twelve cases of legionellosis in the small town of Lorquin, district of Moselle, northeast France, were identified by the local health authority in charge of legionellosis surveillance in September 2006. All patients had pneumonia. Eleven tested positive for urinary antigen, indicating a Legionella pneumophila serogroup 1 infection, two also had positive cultures, and one was diagnosed by a positive culture (Lp1). Dates of symptom onset ranged from 11 to 19 September 2006 (figure). The median age of the cases was 69 years (range 33-78 years), 66% were men. None of the patients have died. No additional cases have been detected since the onset of the last case on 19 September.