Service des études médicales
45, rue Kléber
92309 Levallois-Perret Cedex
Legionellosis, a pneumonia caused by Legionella bacteria and transmitted by inhalation of contaminated aerosols, has been a reportable disease in France since 1987. Although the incidence of the disease seems stable in France, it is increasing in Europe and throughout the world.
Regulations to prevent this disease are based on concentration thresholds in water and differ according to the type of facility at risk and between countries. This article summarizes current knowledge about the quantitative risk assessment of this bacteria, the various published assessments, and the scientific gaps that remain to be filled.