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Saturday, October 29, 2016

Canada - Mosquito Surveillance Reveals the Aedes aegypti Species in Southern Ontario.

We need a new Map.

Canada - Mosquito Surveillance Reveals the Aedes aegypti Species in Southern Ontario. (Wechu). HT: Crof.

In the United States, the Aedes aegypti mosquito primarily exists in the southern states and along the eastern seaboard, where temperatures are more favourable for its survival. There are records of this mosquito being found in some northern states, including Michigan and New Hampshire; however, these were only temporary summer incursions, as the relatively cold winters prevented establishment. To our knowledge, this is the first time Aedes aegypti has been collected in Canada.  
Although it is unknown exactly how the larvae arrived in Ontario, one possibility is that the eggs were transported from the U.S. in shipping containers or other cross-border vehicle traffic. Aedes aegypti eggs could also have been imported in recycled products, such as tires or other containers. Given that this is a tropical mosquito, the extremely hot temperatures this past summer allowed for the species to exist in Windsor. 
“We will continue to ensure that our community stays informed about infectious diseases and the local mosquito surveillance program. It is a key public health service that we provide to Windsor-Essex County residents. The discovery of the yellow fever mosquito larvae through enhanced surveillance of the Aedes albopictus mosquito is an important reminder that we should continue to protect ourselves and our families from mosquito bites,” said Dr. Kirk.   
The Aedes aegypti mosquito is even less cold tolerant than the Aedes albopictus and will not survive the cold winter temperatures. For Zika virus transmission to occur, the Aedes aegypti mosquito would need to feed on an infected person, within the first several days of infection, and then feed upon another susceptible person. 

The greatest risk to contracting Zika virus continues to be centered on those who have travelled to Zika-risk areas (such as South America, the Caribbean and Florida) or who are or have been in sexual contact with these travelers. Read the full story here. More on this story here.

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