Environmental Investigation during Legionellosis Outbreak, Montérégie, Quebec, Canada, 2021

Abstract

In August 2021, a legionellosis outbreak involving 7 persons occurred within a 500-meter radius in the Montérégie region of Québec, Canada. Near real-time modeling of wind direction along with epidemiologic and environmental investigations identified the possible source. Modeling wind direction could help identify likely Legionella pneumophila sources during legionellosis outbreaks.

Keywords

• Legionella pneumophila
• legionellosis
• outbreak
• water cooling tower
• wind rose
• Canada