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Vector-Borne Disease - Statistics and Trends
The following is a summary from the Vector-Borne Disease Team's seasonal highlights.
Mosquitoes
| Year | # of West Nile Virus Positive Traps | # of West Nile Virus Human Cases | # of Mosquito Treatments | # of Catch Basins Completed |
|---|---|---|---|---|
|
2021 |
1 |
0 |
958 | 63, 171 |
|
2020 |
1 |
1 |
1253 | 108,381 |
|
2019 |
0 |
0 |
913 | 113,932 |
- There have been 0 reported human cases of Eastern Equine Encephalitis (EEE) in Middlesex-London.
- There have been 0 mosquitoes caught in Middlesex-London that are capable of carrying Zika Virus.
Ticks Submitted to the Middlesex-London Health Unit
| Total | 357 | 102 | 74 | 63 | 40 | 17 | 80 | 27 | 11 |
| # of Non-Vector Ticks Submitted | # of Blacklegged Ticks Acquired Within Middlesex-London | # of Blacklegged Ticks Acquired Outside of Middlesex-London | |||||||
|---|---|---|---|---|---|---|---|---|---|
| 2019 | 2020 | 2021 | 2019 | 2020 | 2021 | 2019 | 2020 | 2021 | |
|
January |
0 |
0 |
0 |
0 | 2 | 0 | 0 | 0 |
0 |
| February | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
| March | 1 | 0 | 0 | 0 | 3 | 0 | 0 | 4 | 1 |
| April | 5 | 3 | 16 | 4 | 3 | 11 | 8 | 3 | 8 |
| May | 100 | 28 | 23 | 11 | 2 | 4 | 16 | 4 | 0 |
| June | 145 | 49 | 24 | 7 | 5 | 2 | 15 | 4 | 1 |
| July | 43 | 13 | 7 | 4 | 1 | 0 | 5 | 1 | 0 |
| August | 16 | 4 | 4 | 3 | 0 | 0 | 3 | 0 | 0 |
| September | 5 | 5 | 0 | 0 | 3 | 0 | 0 | 1 | 1 |
| October | 1 | 0 | 26 | 11 | 23 | 6 | |||
| November | 0 | 0 | 6 | 10 | 7 | 4 | |||
| December | 0 | 0 | 1 | 0 | 0 | 0 | |||
In the case of Lyme disease, a 'vector' is the term used to describe a tick species that can transmit (pass) Lyme disease through a bite. Blacklegged ticks are capable of transmitting Lyme Disease in Ontario. Other 'non-vector' ticks cannot transmit Lyme disease. View the Lyme Disease web page for more information.
Active Tick Surveillance in Middlesex-London
| Year | Number of Blacklegged Ticks Found Tick Dragging |
| 2021 | 34 |
| 2020 | 107 |
| 2019 | 31 |
Lyme Disease Cases in Middlesex-London
| Year | Number of Confirmed/Probable Human Lyme Disease Cases in Middlesex-London Residents |
| 2021 | 5 |
| 2020 | 2 |
| 2019 | 8 |
Vector-Borne Disease Surveillance Reports
- Visit Public Health Ontario’s web page to read the Vector-Borne Disease Surveillance Reports for the province of Ontario.
- Visit the Government of Canada's web page to view National Surveillance Reports.
Additional Information
For more information about the Vector-Borne Disease Team or information about Vector-Borne Diseases and human health, please continue to browse our website, or call the Health Unit at 519-663-5317.
Date of creation: April 18, 2018
Last modified on: October 7, 2021
Last modified on: October 7, 2021