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Middlesex-London Health Unit

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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
September 5 0 0  1
October 1    26 11    23  
November 0   6 10    7  
December 0   1   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

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