Mosquito-borne disease surveillance report: July 28 to August 3, 2019 (Week 31)
Organization: Health Canada
Date published: 2019-08-13
As of surveillance week 31, ending on August 3, 2019, one probable human case of West Nile virus (WNV) in Ontario has been reported to the Public Health Agency of Canada (PHAC) (Table 1).
|Province||Clinical Cases||Total Footnote 1||Asymptomatic Infections Footnote 2||YTD Grand Total||Rate(per 100,000) Footnote 3|
|Total||0 [0%]||0 [0%]||1 [100%]||1 [100%]||0||1||0|
Mosquito, Wild Bird & Equine Epidemiology
As of week 31, PHAC has been notified of 3, 775 mosquito pools tested for WNV. Of these, three were positive: two in Ontario and one in Manitoba (Table 2).
Seven of 26 dead wild birds have tested positive for WNV, by the Canadian Wildlife Health Cooperative (CWHC): four in Ontario and three in Quebec (Table 3).
Since the start of this season, the Canadian Food Inspection Agency (CFIA) has not reported any domestic animals that tested positive for WNV (Table 3).
Figure1 - 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
|Province Footnote 1||Positive Pools||Total Pools Tested||Percent Positive|
|Province||Wild Birds Footnote 1||Equine|
|Week 31||Year-to-Date Total||Week 31||Year-to-Date Total|
As of August 3, 2019, 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 2019 transmission season.
The CFIA has not reported any horses testing positive for Eastern Equine Encephalitis virus (EEEV) in Canada.
Provincial/Territorial & 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.
Report a problem or mistake on this page
- Date modified: