New Asian mosquito found in B.C. a potential disease carrier

Mosquito species that can spread encephalitis found in Maple Ridge, Mission, believed established in Lower Mainland

A new potentially disease-carrying mosquito species not previously found in Western Canada is now believed to be breeding in the Lower Mainland. This adult female was found in Mission in May.

An invasive Asian mosquito that can carry diseases such as encephalitis has been detected for the first time in Western Canada, at a site in Metro Vancouver.

SFU biologist Peter Belton was among the researchers who found the Aedes Japonicus mosquito species breeding in water on a tarp in a Maple Ridge backyard.

The closest the species had been detected previously was in southern Washington and Oregon in 2008, and it has been found in Eastern Canada and the U.S. since 1998.

The mosquito is capable of transmitting West Nile virus, three types of encephalitis and Chikungunya, a viral disease that causes fever and severe joint pain mainly in Africa and Asia.

Belton says the mosquito could pose a significant public health hazard in the future if global warming expands the distribution of the diseases it can carry.

“We believe it could be a significant threat to the health of humans and domestic animals and recommend that its population should be monitored,” Belton and other researchers said in their paper published in the Journal of Medical Entomology.

There is no current concern about disease spread from the new species but that could change, said Scott McMahon, operations manager for Culex Environmental, which monitors mosquitos in the region for Metro Vancouver.

“West Nile was never in Canada before either,” he said, adding that could be a cautionary tale for the eventual arrival of a new disease.

“You don’t know how it might be introduced, but we’re one step closer I would say,” McMahon said.

“To have a pathogen and the transmission of it you need the right (mosquito) species and the right pathogen. Now we have one out of two.”

Researchers first identified the Japonicus larvae in July 2014 in a Maple Ridge garden, where more than 200 were counted by early 2015.

An adult female was found feeding 13 kilometres further east in in Mission in May.

That led the researchers to conclude at least two populations have been established in the Lower Mainland.

SFU researchers and Culex Environmental are continuing to study the insects, hoping to pinpoint their origin through DNA and determine how they are most likely to spread.

The mosquito has been known to spread rapidly in other regions it has invaded and often is found breeding in old car tires.

Tarp in Maple Ridge where new mosquito species was first identified.

Just Posted

Police watchdog investigating two officers after Langley teen’s suspected overdose

According to IIO, two officers were deployed to help Carson Crimeni but did not locate him before he died

Auditor general to release ‘executive expenses’ report for Surrey School District

Report is to determine whether employer-paid expenses ‘comply’ with applicable district policies

Grieving South Surrey mom ‘disappointed’ province not moving quicker to fix recovery homes

Min. Judy Darcy says new regulations, effective Dec. 1, follow ‘many horror stories’

Surrey school district unveils its first rainbow crosswalk

Superintendent Jordan Tinney says colour crossing ‘a statement that everyone is welcome in Surrey’

North Delta MLA Ravi Kahlon cleared of conflict allegations

Commissioner finds MLA’s father’s taxi licence doesn’t equal a conflict of interest while working on ride-sharing regulations

Pickle me this: All the outrageous foods at this year’s PNE

Pickled cotton candy, deep-fried chicken skins, and ramen corndogs are just a start

New study suggests autism overdiagnosed: Canadian expert

Laurent Mottron: ‘Autistic people we test now are less and less different than typical people’

B.C. father tells judge he did not kill his young daughters

Andrew Berry pleaded not guilty to the December 2017 deaths

Trans Mountain gives contractors 30 days to get workers, supplies ready for pipeline

Crown corporation believes the expansion project could be in service by mid-2022

Mammoth sturgeon catch was ‘a fish of a lifetime’ for Chilliwack guide

Sturgeon was so enormous it tied for largest specimen every tagged and released in the Fraser

Fraser River sea bus proposed to hook into TransLink system

Maple Ridge councillor just wants to start discussion

Rosemount cooked diced chicken linked to listeria case in B.C.

The symptoms of listeria include vomiting, nausea, fever, muscle aches

Body found believed to be missing Chilliwack senior with dementia

Police say case is now in the hands of the coroner

Most Read