Mosquito-borne disease surveillance report: August 16 to August 29, 2020 (Week 34 and 35)
Organization: Public Health Agency of Canada
Date published: 2020-09-15
As of surveillance week 35, ending on August 29, 2020, twenty-two human cases of West Nile virus (WNV) have been reported to the Public Health Agency of Canada (PHAC) (Table 1).
|Province||Clinical cases||Total of clinical cases Footnote 1||Asymptomatic infections Footnote 2||YTD grand total||Rate (per 100,000) Footnote 3|
Mosquito, wild bird and equine epidemiology
As of week 34 and 35, PHAC has been notified of 12926 mosquito pools tested for WNV in Canada. Of these, there have been five WNV-positive mosquito pools identified in Manitoba, 147 in Ontario, and twelve in Québec (Table 2).
Figure 2 footnotes
- Footnote 1
Human cases includes clinical cases and asymptomatic infection.
Return to footnote 1 referrer
- Footnote 2
Episode week is based on symptom onset or best available date including: diagnosis, lab sample or date reported.
Return to footnote 2 referrer
- Footnote 3
Episode week is based off date of death or best available date including: date found, submitted, or received.
Return to footnote 3 referrer
|ProvinceFootnote 1||Positive pools||Total pools tested||Percent positive|
|Manitoba||5Footnote *||1236||0.40 %|
|Province||Wild birds Footnote 1||Equine|
As of August 29, 2020, no human exposures or cases of California serogroup virus have been reported by the National Microbiology Laboratory.
Eastern equine encephalitis
No human cases of EEEV have been reported to PHAC since the beginning of the 2020 transmission season.
The CFIA has reported one horse testing positive for Eastern Equine Encephalitis virus (EEEV) in Ontario.
Provincial/territorial and international surveillance links
Data reported to PHAC is subject to change and may differ from provincial webpages due to reporting timelines. To obtain the latest arbovirus surveillance data, please refer to the following jurisdictional/regional webpages:
Thank you to all our partners for participating in the National WNV/MBD surveillance program.
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