Communicable Disease Surveillance Reports
Annual and monthly communicable disease surveillance reports for Toronto are currently unavailable online. To receive a PDF copy of any report, please contact the Communicable Disease Surveillance Unit by phone (416.392.7411) or email (email@example.com) during business hours (Monday to Friday, 8:30 am to 4:30 pm). We apologize for any convenience, and we expect to resume public information sharing before the end of 2017.
Annual data include baseline incidence rates and trends of reportable communicable diseases in Toronto over an 11-year period, with a focus on communicable disease cases and outbreaks during the most recent calendar year for which complete data are available.
Annual Communicable Disease Surveillance reports for Toronto are currently unavailable online. If you would like a copy of a report, please contact the Communicable Disease Surveillance Unit by phone (416-392-7411) or email (firstname.lastname@example.org) during business hours (Monday to Friday, 8:30 a.m. to 4:30 p.m.). We apologize for any inconvenience.
Additional data and information on communicable disease trends and activities in Ontario and Toronto can be accessed via Public Health Ontario, including:
Current reportable disease trends in Toronto are summarized in this report. To allow adequate time for reports to be processed, investigations and quality assurance checks completed, data are posted with a delay of approximately two months.
The weekly influenza bulletin is produced weekly during periods with increased influenza activity in Toronto – generally November to April – and provides descriptive epidemiologic data on influenza activity in the City of Toronto.
Summary of Influenza Activity in Toronto: Week 48 (Nov 26 to Dec 2, 2017)
|Laboratory-Confirmed Influenza Cases†||Lower||Ten new laboratory-confirmed cases of influenza were reported in week 48, lower than the 16 cases reported in week 47. To date this season, 77 cases have been reported, higher than the previous 5-season mean of 65 cases.|
|Influenza Strains for Ontario Cases ‡||Two new isolates characterized||The Ontario Respiratory Pathogen Bulletin for week 47 reported one additional characterization of an isolate for an Ontario case since the last report. Since September 1, 2017, the following influenza isolates were characterized:
• A/Michigan/45/2015, H1N1 (n=6),
• B/Phuket/3073/13-like (n=5),
• A/Hong Kong/4801/2014-like H3N2(n=4),
• B/Brisbane/60/2008 (n=1).
|Institutional Influenza Outbreaks||Comparable||Two institutional influenza outbreaks were reported in week 48.|
|Overall||Lower||Influenza activity in Toronto for Week 48 was lower than the activity in Week 47.|
*May not reflect statistically significant changes, but describes overall observed trends and compares to the previous surveillance week.
† Starting in the 2017/18 season, the Ontario Ministry of Health and Long-Term Care advised public health units that they were no longer required to do any additional investigation to collect information beyond what has already been reported in the initial laboratory report. No changes were made to investigation of institutional influenza outbreaks. As a result, subtype information will be available for a smaller proportion of laboratory-confirmed cases, and hospitalization and death information will be underestimated. Therefore, comparisons between the current season and prior seasons should be made with caution. Please refer to the technical notes for details.
‡Data on influenza strains for Ontario cases are obtained from the Ontario Respiratory Pathogen Bulletin published the week preceding the current Weekly Influenza News for Toronto (e.g. for the Weekly Influenza News for week 34, the influenza strains data are obtained from the Ontario Respiratory Pathogen Bulletin published for week 33).