Introduction - Surveillance of Legionnaires' disease showed a moderate decline in incidence in 2006 (1,443 reported cases). Results - In 2007, 1,428 cases were reported, corresponding to an incidence rate of 2.3 per 100,000 population. This incidence rate was higher among men and among individuals aged 80 years and older. The median age of cases was 61 years, and the male-to-female ratio was 3.2. The case-fatality rate was 10%, and one or more risk factors were identified in 70% of cases. The majority (93%) were diagnosed via a urine detection test, and a strain was isolated in 231 cases (16%). Endemic strains accounted for 29% of the clinical strains isolated. Risk exposure during the incubation period was reported in 36% of cases, and several investigations of clustered cases were conducted. Discussion-Conclusion - The results of epidemiological surveillance of Legionnaires' disease in 2007 are encouraging, with incidence having stabilized since 2005. Nevertheless, it is necessary to continue disseminating information, ensure compliance with recent regulations, and advance research in order to achieve a real reduction in incidence in the coming years. (R.A.)