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 |
|---|---|---|---|---|
|
2023 |
N/A |
0 |
N/A | N/A |
|
2022 |
0 |
0 |
1215 | 113,977 |
|
2021 |
1 |
0 |
958 | 114,640 |
- 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 | 74 | 18 | 0 | 21 | 10 | 0 | 13 | 2 | 0 |
| # of Non-Vector Ticks Submitted | # of Blacklegged Ticks Acquired Within Middlesex-London | # of Blacklegged Ticks Acquired Outside of Middlesex-London | |||||||
|---|---|---|---|---|---|---|---|---|---|
| 2021 | 2022 | 2023 | 2021 | 2022 | 2023 | 2021 | 2022 | 2023 | |
|
January |
0 |
0 |
0 | 0 | 0 | 0 |
0 |
0 |
0 |
| February | 0 | 0 | 0 | 0 | 0 | 0 | |||
| March | 0 | 0 | 0 | 0 | 1 | 0 | |||
| April | 16 | 0 | 11 | 1 | 8 | 0 | |||
| May | 23 | 3 | 4 | 3 | 0 | 0 | |||
| June | 24 | 11 | 2 | 1 | 1 | 1 | |||
| July | 7 | 1 | 0 | 0 | 0 | 0 | |||
| August | 4 | 0 | 0 | 1 | 0 | 0 | |||
| September | 0 | 0 | 0 | 0 | 1 | 0 | |||
| October | 0 | 3 | 2 | 1 | 1 | 0 | |||
| November | 0 | 0 | 2 | 2 | 1 | 1 | |||
| December | 0 | 0 | 0 | 1 | 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 |
| 2023 | N/A |
| 2022 | 124 |
| 2021 | 34 |
Lyme Disease Cases in Middlesex-London
| Year | Number of Confirmed/Probable Human Lyme Disease Cases in Middlesex-London Residents |
| 2023 | 0 |
| 2022 | 23 |
| 2021 | 5 |
Vector-Borne Disease Surveillance Reports
- Visit Public Health Ontario’s web page to read the Infectious Diseases Surveillance Reports for the province of Ontario. Reports include case counts and rates for West Nile Virus and Lyme Disease.
- 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: February 8, 2023
Last modified on: February 8, 2023