Increase in Legionellosis Cases in Toronto

Since August 22, Toronto Public Health has received reports of 12 confirmed cases of legionellosis. This is a higher number than would be expected for this time of year. Symptom onset dates started from August 14th. The mean age of this cluster of cases is 60 years (range: 44-78 years). All investigated cases have reported underlying medical conditions and have required hospitalization. The cases have occurred across the city and are likely weather-related.
Any suspect or confirmed cases of legionellosis should be immediately reported to Toronto Public Health by calling our surveillance unit at 416-392-7411 during work hours (8:30am to 4:30pm, Monday to Friday) or at 3-1-1 after hours.