West Nile virus and other mosquito-borne diseases national surveillance report – July 23 to July 29, 2017 (Week 30)
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West Nile virus
Canada
Humans
As of surveillance week 30, ending on July 29, 2017, the Public Health Agency of Canada (PHAC) has been officially informed of three human clinical cases of West Nile virus (WNV). All were reported by the province of Ontario [Timiskaming (1), Windsor-Essex (1), and York Regional (1)].
Mosquitoes
As of week 30, there have been 4 provinces (Ontario, Manitoba, Quebec and Saskatchewan) with reports of positive mosquito pools of West Nile Virus.
A total of 89 positive pools of WNV have been found: 64 from Ontario [Ottawa (2), Peel Regional (10), Toronto (15), Halton Regional (8), Haliburton-Kwartha-Pine Ridge District(1), Simcoe Muskoka District (1), Windsor-Essex County (11), Brant County (1), Chatham-Kent (1), Eastern Ontario (1), Durham Reginal (1), Hamilton (2), Renfrew County and district (1), Peterborough County-City (1), Hastings and Prince Edward Countries (4), Lambton (1), and York Regional (3)]; 14 from Manitoba [(Winnipeg (4), Southern (2), Interlake eastern (2), and Prairie Mountain(6)]; 9 from Quebec [Montérégie (6), Laval (1), Mauricie-centre-du-Quebec(2)], and 2 from Saskatchewan.
As of initial surveillance, PHAC has received 7 485 mosquito pools tested for WNV in Canada: Quebec (588), Ontario (6 217), Manitoba (486), and Saskatchewan (194).
Birds
The Canadian Wildlife Health Cooperative has tested 27 dead birds for West Nile virus: thirteen in Quebec, nine in Ontario, two in British Columbia, one in Saskatchewan and two in Manitoba. Of these, 15 were positive for WNV: 8 in Quebec [St Lambert (2), St Damase (1), Sherbrooke (1), Drummondville (1), Sainte-Madeleine (1), Valois (1) and Montréal (1)], 2 in Manitoba [Winnipeg (2)], and 5 in Ontario [Campbellsville (3), Trenton Lakes (1) and Guelph (1)].
Domestic Animals
The Canadian Food Inspection Agency has not reported any domestic animals tested positive for West Nile virus since the beginning of the 2017 season.
United States and U.S. territories
As of July 29, 2017, sixty seven (67) human cases of WNV have been reported by the Centers for Disease Control and Prevention in the United States. Of these, 40 (59.70%) were classified as neuroinvasive disease and 27 (40.29%) as non-neuroinvasive disease. In addition, 9 presumptive viremic blood donors have been identified.
Detailed information can be accessed via the CDC web site.
Europe and Neighbouring Countries
As of July 29, 2017, the European Union Member States have reported five human cases of West Nile fever in Greece. In the neighbouring countries, four human cases (confirmed and probable) have been reported by Israel.
Detailed information can be accessed via the ECDC web site.
Other Mosquito-borne Diseases
Canada
Eastern Equine Encephalitis virus:
No human cases of eastern equine encephalitis virus have been reported to the Public Health Agency of Canada since the 2017 season.
California Serogroup virus:
Since January 1, 2017, 9 human cases of laboratory-confirmed cases/exposures of California serogroup virus were diagnosed by the National Microbiology Laboratory in Canada: Alberta (2), Saskatchewan (1), and Quebec (6). Of these cases, four were further classified as Jamestown Canyon virus and the rest as unknown.
*West Nile virus clinical cases and asymptomatic infections are grouped by report week, based on episode date. Episode date could include one of the following: onset date, diagnosis date, lab sample date or reporting date.
Figure 2: Text Equivalent
As of week 30, ending July 29, 2017, there are three West Nile virus human clinical cases in Canada.
Week 30: July 23 to July 29, 2017 | ||||||
---|---|---|---|---|---|---|
West Nile virus neurological syndrome | West Nile virus non-neurological syndrome | Unclassified/ unspecified |
Total clinical cases | Number of travel-related cases | West Nile virus asymptomatic infection | |
Newfoundland and Labrador | 0 | 0 | 0 | 0 | 0 | 0 |
Prince Edward Island | 0 | 0 | 0 | 0 | 0 | 0 |
Nova Scotia | 0 | 0 | 0 | 0 | 0 | 0 |
New Brunswick | 0 | 0 | 0 | 0 | 0 | 0 |
Quebec | 0 | 0 | 0 | 0 | 0 | 0 |
Ontario | 0 | 0 | 3 | 3 | 1 | 0 |
Manitoba | 0 | 0 | 0 | 0 | 0 | 0 |
Saskatchewan | 0 | 0 | 0 | 0 | 0 | 0 |
Alberta | 0 | 0 | 0 | 0 | 0 | 0 |
British Columbia | 0 | 0 | 0 | 0 | 0 | 0 |
Yukon Territory | 0 | 0 | 0 | 0 | 0 | 0 |
Northwest Territory | 0 | 0 | 0 | 0 | 0 | 0 |
Nunavut | 0 | 0 | 0 | 0 | 0 | 0 |
Figure 3: Text Equivalent
Report Week | |||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 | Total | |
2017 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 1 | |||||||||||||||||||||
2016 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 5 | 5 | 14 | 11 | 16 | 12 | 9 | 6 | 15 | 5 | 0 | 0 | 3 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 106 |
2015 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 2 | 1 | 0 | 2 | 7 | 4 | 8 | 9 | 11 | 4 | 8 | 11 | 8 | 4 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 82 |
2013 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 1 | 2 | 2 | 5 | 5 | 6 | 9 | 10 | 21 | 16 | 14 | 12 | 7 | 2 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 118 |
2012 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 3 | 5 | 11 | 16 | 27 | 53 | 63 | 57 | 43 | 43 | 45 | 24 | 30 | 14 | 9 | 5 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 450 |
2007 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 2 | 3 | 4 | 11 | 35 | 36 | 72 | 139 | 424 | 471 | 443 | 287 | 182 | 116 | 71 | 30 | 18 | 10 | 11 | 5 | 4 | 2 | 0 | 0 | 0 | 0 | 0 | 2 378 |
Week 30: July 23 to July 29, 2017 | ||||||
---|---|---|---|---|---|---|
West Nile virus neurological syndrome | West Nile virus non-neurological syndrome | Unclassified/ unspecified |
Total clinical casesTable 1 Footnote 1 | Number of travel-related casesTable 1 Footnote 2 | West Nile virus asymptomatic infectionTable 1 Footnote 3 | |
Newfoundland and Labrador | 0 | 0 | 0 | 0 | 0 | 0 |
Prince Edward Island | 0 | 0 | 0 | 0 | 0 | 0 |
Nova Scotia | 0 | 0 | 0 | 0 | 0 | 0 |
New Brunswick | 0 | 0 | 0 | 0 | 0 | 0 |
Quebec | 0 | 0 | 0 | 0 | 0 | 0 |
Ontario | 0 | 0 | 3 | 3 | 1 | 0 |
Manitoba | 0 | 0 | 0 | 0 | 0 | 0 |
Saskatchewan | 0 | 0 | 0 | 0 | 0 | 0 |
Alberta | 0 | 0 | 0 | 0 | 0 | 0 |
British Columbia | 0 | 0 | 0 | 0 | 0 | 0 |
Yukon Territory | 0 | 0 | 0 | 0 | 0 | 0 |
Northwest Territory | 0 | 0 | 0 | 0 | 0 | 0 |
Nunavut | 0 | 0 | 0 | 0 | 0 | 0 |
Total | 0 | 0 | 3 | 3 | 1 | 0 |
Year to date: January 1 to July 29, 2017 | ||||||
Newfoundland and Labrador | 0 | 0 | 0 | 0 | 0 | 0 |
Prince Edward Island | 0 | 0 | 0 | 0 | 0 | 0 |
Nova Scotia | 0 | 0 | 0 | 0 | 0 | 0 |
New Brunswick | 0 | 0 | 0 | 0 | 0 | 0 |
Quebec | 0 | 0 | 0 | 0 | 0 | 0 |
Ontario | 0 | 0 | 3 | 3 | 1 | 0 |
Manitoba | 0 | 0 | 0 | 0 | 0 | 0 |
Saskatchewan | 0 | 0 | 0 | 0 | 0 | 0 |
Alberta | 0 | 0 | 0 | 0 | 0 | 0 |
British Columbia | 0 | 0 | 0 | 0 | 0 | 0 |
Yukon Territory | 0 | 0 | 0 | 0 | 0 | 0 |
Northwest Territory | 0 | 0 | 0 | 0 | 0 | 0 |
Nunavut | 0 | 0 | 0 | 0 | 0 | 0 |
Total | 0 | 0 | 3 | 3 | 1 | 0 |
Table 1 Footnotes
|
Province | Year to date: January 1 to July 29, 2017 | ||
---|---|---|---|
Number of positive mosquito pools | Number of mosquito pools tested | Percentage of positive mosquito pools (%) | |
Quebec | 9 | 588 | 1.53 |
Ontario | 64 | 6 217 | 1.03 |
Manitoba | 14 | 486 | 2.88 |
Saskatchewan | 2 | 194 | 1.03 |
Alberta | - | - | - |
British Columbia | - | - | - |
Newfoundland and Labrador | - | - | - |
Prince Edward Island | - | - | - |
Nova Scotia | - | - | - |
New Brunswick | - | - | - |
Yukon Territory | - | - | - |
Northwest Territory | - | - | - |
Nunavut | - | - | - |
Total | 89 | 7 485 | 1.19 |
Province / Territory | Report week 30, 2017 | |||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | |
Newfoundland and Labrador | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||
Prince Edward Island | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||
New Brunswick | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||
Nova Scotia | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||
Quebec | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 147 | 147 | 147 | 147 | ||||||||||
Ontario | 13 | 15 | 43 | 84 | 194 | 299 | 718 | 794 | 964 | 1 003 | 1 037 | 1 053 | ||||||||||
Manitoba | 0 | 0 | 0 | 0 | 15 | 45 | 48 | 16 | 60 | 93 | 96 | 113 | ||||||||||
Saskatchewan | 0 | 0 | 0 | 0 | 6 | 20 | 11 | 18 | 25 | 31 | 38 | 45 | ||||||||||
Alberta | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||
British Columbia | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||
Yukon Territory | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||
Northwest Territory | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||
Nunavut | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||
Total | 13 | 15 | 43 | 84 | 215 | 364 | 777 | 828 | 1 196 | 1 274 | 1 318 | 1 358 | ||||||||||
Table 3 Footnotes
|
Figure 4: Text Equivalent
As of week 30, ending July 29 in 2017, there are 15 West Nile virus cases in birds, in Canada.
Report Weeks of 2017 | |||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 | Total | |
Newfoundland and Labrador | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||||||||||||
Prince Edward Island | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||||||||||||
New Brunswick | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||||||||||||
Nova Scotia | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||||||||||||
Quebec | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 3 | 2 | 8 | ||||||||||||||||||||
Ontario | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 1 | 1 | 0 | 0 | 0 | 5 | ||||||||||||||||||||
Manitoba | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 2 | ||||||||||||||||||||
Saskatchewan | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||||||||||||
Alberta | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||||||||||||
British Columbia | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||||||||||||
Yukon Territory | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||||||||||||
Northwest Territory | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||||||||||||
Nunavut | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||||||||||||
Total | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 1 | 1 | 3 | 3 | 4 | 15 |
- Figure 5 Footnote 2
-
Not all provinces are conducting dead bird surveillance as part of their own WNV surveillance program. However, WNV positive dead birds may be identified through the National Wildlife Disease Surveillance Program of the Canadian Wildlife Health Cooperative.
Figure 5: Text Equivalent
Year | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
% Positive | 2012 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 33 | 67 | 33 | 67 | 33 | 50 | 67 | 64 | 67 | 33 | 67 | 67 | 55 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
% Positive | 2015 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 100 | 0 | 0 | 0 | 100 | 83 | 60 | 73 | 0 | 25 | 67 | 83 | 57 | 50 | 80 | 67 | 0 | 21 | 0 | 0 | 0 | 0 | 50 | 0 | 0 |
% Positive | 2016 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 33 | 50 | 23 | 25 | 80 | 43 | 43 | 20 | 36 | 0 | 80 | 0 | 0 | 0 | 0 | 0 | 0 |
# Positive | 2016 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 3 | 7 | 1 | 4 | 3 | 3 | 1 | 5 | 0 | 8 | 0 | 0 | 0 | 0 | 0 | 0 |
# Positive | 2017 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 1 | 1 | 3 | 3 | 4 |
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