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Surveillance Week Number of Ae. albopictus mosquitoes trapped and identified Results of Zika virus/West Nile Testing Cumulative total # of Ae. albopictus mosquitoes found Site (City or County) Comments

May 21 to May 27 (Week 21)

1 Negative 1 City Enhanced mosquito surveillance

May 28 to June 3 (Week 22)

1 Negative 2 City Enhanced mosquito surveillance

June 4 to June 10 (Week 23)

0 N/A 0 N/A N/A

June 11 to June 17 (Week 24)

5 Negative 7 City Enhanced mosquito surveillance

June 18 to June 24 (Week 25)

2 Negative 9 City Enhanced mosquito surveillance

June 25 to July 1 (Week 26)

0 N/A 0 N/A N/A

July 2 to July 8 (Week 27)

2 Negative 11 City Enhanced mosquito surveillance

July 9 to July 15 (Week 28)

9 Negative 20 City Enhanced mosquito surveillance

July 16 to July 22 (Week 29)

3 Negative 23 City Enhanced mosquito surveillance

July 23 to July 29 (Week 30)

14 Negative 37 City Enhanced mosquito surveillance

July 30 to August 5 (Week 31)

2 Negative 39 City Enhanced mosquito surveillance

August 6 to August 12 (Week 32)

18 Negative 57 City

Mosquito surveillance

August 13 to August 19 (Week 33)

15 Negative 72 City Mosquito surveillance

August 20 to August 26 (Week 34)

37 Negative 109 City

Mosquito surveillance

August 27 to September 2 ( Week 35)

87 Negative 196 City

Mosquito surveillance

September 3 to September 9 ( Week 36)

68 Negative 264 City

Mosquito surveillance

September 10 to September 16 ( Week 37)

232 Negative 496 City

Mosquito surveillance

September 17 to September 23 ( Week 38)

202 Negative 698 City

Enhanced mosquito surveillance

September 24 to September 30 ( Week 39)

108 Negative 806 City

Mosquito surveillance

October 1 to October 7 ( Week 40)

171 Negative 977 City

Enhanced mosquito surveillance

October 8 to October 14 ( Week 41)

152 Negative 1129 City

Mosquito surveillance

Surveillance Week Number of Ae. albopictus mosquitoes trapped and identified Results of Zika virus/West Nile Testing Cumulative total # of Ae. albopictus mosquitoes found Site (City or County) Comments
August 7 to August 13 (Week 32) 2 Negative 2 City Enhanced mosquito surveillance

September 25 to October 1 (Week 39)

3 Negative 5 City Field surveillance
Surveillance Week Number of Ae. albopictus larvae identified Results of Zika virus /West Nile Testing Cumulative total # of Ae. albopictus mosquitoes larvae found Site (City or County) Comments

September 25 to October 1 (Week 39)

42 Negative 42 City Field surveillance
2016 Adult Mosquito Surveillance
Surveillance Week Number of Ae. albopictus mosquitoes trapped and identified Results of Zika virus Testing Cumulative total # of Ae. albopictus mosquitoes found Site (City or County) Comments
Sept. 14 1 Negative 1 City N/A
Sept. 21 3 Negative 4 City N/A
Sept. 28 0 N/A 0 N/A N/A
Oct. 4 2 Negative 6 City N/A
Oct. 10 11 Negative 17 City Enhanced Ae. albopictus mosquito surveillance

Photo of Aedes albopictus mosquito

The Aedes albopictus mosquito is a tropical mosquito that is part of the Aedes species which is capable of transmitting Zika virus. Although this species of mosquito, also known as the Asian tiger mosquito, is capable of transmitting viruses including Zika, it is not the species that is responsible for the majority of human cases of Zika virus infection in the Caribbean, South America and Florida. That species is the Aedes aegypti mosquito.

Aedes albopictus has been identified across the United States, including Vermont, New York, New Hampshire and Massachusetts. It was first documented in the United States near Houston, Texas, in 1987 and spread rapidly through the southern United States and up their eastern seaboard.

Since Ontario started trapping mosquitoes for West Nile virus (WNv) surveillance in 2002, three Aedes albopictus were found in 2005; with one each from the health units of Ottawa, Peel and Toronto. One was found in 2012 near Amherstburg. The Aedes albopictus captured in Windsor-Essex County in 2016 were caught at the end of the mosquito season as part of Windsor-Essex’s surveillance program for WNv. Its expansion is limited to areas with suitable temperatures that can allow it to survive.  Our cold winter temperatures would prevent the mosquito’s ability to survive here. 

The biting behaviour of the Aedes albopictus is different than the Culex pipiens that transmit WNv in Ontario. It is an aggressive daytime biter, with peaks in activity in the early morning and late afternoon. These mosquitoes do not breed in ponds, puddles or marshes. They typically lay eggs in and near standing water in items such as buckets, bowls, animal dishes, flower potters and vases. It is important to change water regularly, especially in pet dishes and water in bird baths.

The best way to prevent diseases spread by mosquitoes is to protect yourself and your family from mosquito bites. Individuals can do so in several ways:

  • Use insect repellents that contain DEET, Icaridin or other approved ingredients on clothing as well as exposed skins. Always read and follow label directions.
  • Wear long-sleeved shirts, long pants, and a hat when outdoors. Light-coloured clothing is best as mosquitoes tend to be attracted to dark colours.
  • Make sure that door and window screens fit securely and are free of holes.

If you have any questions, please contact the Windsor-Essex County Health Unit at 519-258-2146, ext. 4475.

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