Mosquito-borne diseases surveillance report: July 19 to August 1, 2021 (Week 29 to 30)
Organization: Public Health Agency of Canada
Date published: 2021-08-18
As of surveillance week 30, ending on August 1, 2021, one human case of West Nile virus (WNV) has 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 30, PHAC has been notified of 8,979 mosquito pools tested for WNV in Canada. Of these, there have been 29 WNV-positive mosquito pools identified in Manitoba and 16 in Ontario (Table 2).
Figure 2 - Legend
Human cases includes clinical cases and asymptomatic infection.
Episode week is based on symptom onset or best available date including: diagnosis, lab sample or date reported.
Episode week is based off date of death or best available date including: date found, submitted, or received.
|ProvinceFootnote 1||Positive pools||Total pools tested||Percent positive|
|Québec||0||655Footnote 2||0.00 %|
|Province||Wild birds Footnote 1||Equine|
As of August 1, 2021, 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 2021transmission 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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