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Canadian mosquito spread of Zika untested

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  • Canadian mosquito spread of Zika untested

    Canadian mosquito spread of Zika untested

    CBC News Posted: Jan 29, 2016 8:32 PM ET Last Updated: Jan 29, 2016 8:44 PM ET
    ...
    Hunter is interested in the role insects play in the spread of disease. She's applied to the federal government to study Zika virus at a Level 3 lab.
    ...
    We keep reporting that Canadian mosquitoes aren't likely to be a concern.

    We don't actually have Aedes aegypti here in Canada. It is in the southern States, it's made of good incursion in southern states but not here. It overwinters in the egg stage, and our climate is just too cold, so they die out.

    However there is a second species we are concerned about. It's the one called Aedes albopictus, which is the Asian tiger mosquito. It is also an invasive species, also found in the southern States, and it's moving its way northwards. In fact, this is one of the mosquitoes that's being transported all over the world and becoming an invasive species everywhere it's going, and it can tolerate cooler temperatures. So the concern is that it may in the future be able to establish in Canada.

    It's in southern New York state, in New Jersey, Pennsylvania. It's definitely moving northwards, and we can potentially have it here in the future.
    ...
    Can we get into the specifics now about why our homegrown mosquitoes can't carry these viruses?

    I would love to be able to say that our normal Canadian mosquitoes can't carry the virus but honestly we just don't know. There have been no transmissions studies done in Canada yet to see whether or not Zika virus can be transmitted by local mosquitoes. We know that we do have several species that we're concerned about and the Public Health Agency of Canada is planning on testing those species to see if they are competent vectors. And here at Brock we also have a containment level three lab where we can also test species. We're just waiting to get the permits to be allowed to work with Zika.

    We're actually not accurate when we say with confidence that these Canadian mosquitoes can't carry it. Is that right?

    That is actually a true statement. We do not know whether our species can transmit or not because the studies just haven't been done.

    The species that are in the genus Culex are able to transmit many arboviruses that are related, actually, to Zika virus. However, they have a different life cycle. Culex mosquitoes generally transmit viruses that have a bird as an intermediate host. The thing with Zika virus and also, incidentally with dengue and chikungunya, those are diseases or viruses that can be transmitted from a human to a mosquito to a human, so there's no need for an intermediate host.
    ...
    What studies do you want to do and what questions you want to answer in terms of the ability of certain species to carry Zika in Canada?

    We would want to know whether or not species that are actually found here are capable of picking up the virus and then replicating it inside their bodies and have that virus move to their salivary glands so that when they then feed on their next host, they can spit it into their next host. So, it's called a competency study to look at whether or not our home-grown mosquitoes can transmit.
    ...
    http://www.cbc.ca/news/health/zika-mosquitoes-1.3426603
    "Safety and security don't just happen, they are the result of collective consensus and public investment. We owe our children, the most vulnerable citizens in our society, a life free of violence and fear."
    -Nelson Mandela

  • #2
    Zika virus shipped to Canada, to test native mosquito infectability

    The Canadian Press
    Published Friday, February 19, 2016 10:19AM EST

    TORONTO -- Insect scientists at Brock University have received a shipment of Zika virus that will allow them to see whether mosquitoes native to Canada can become infected with the pathogen and potentially transmit it to humans.

    The St. Catharines, Ont., university is the only academic institution in Canada with a CL3 containment lab that includes an insectary.
    ...
    The research will be led by Fiona Hunter, a medical and veterinary entomologist who specializes in mosquitoes and other biting insects.
    ...
    http://www.ctvnews.ca/health/zika-vi...lity-1.2784738
    "Safety and security don't just happen, they are the result of collective consensus and public investment. We owe our children, the most vulnerable citizens in our society, a life free of violence and fear."
    -Nelson Mandela

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    • #3
      No signs yet Canadian mosquitoes can carry Zika virus

      BY NEWS STAFFPOSTED AUG 3, 2016 9:10 PM EDT
      ...
      Ontario has 67 species of mosquitoes and Dr. Fiona Hunter thinks it’s entirely possible one of them is capable of carrying and spreading Zika.

      “I think there are other species that are transmitting it and there’s good evidence to back that up,” said Hunter. “So far the mosquitoes that we’ve tested have not been transmitting or capable of transmitting, so that’s very, very good news.”

      However, Hunter says she has yet to get her hands on the type of mosquito known to carry West Nile, a virus that’s in the same family of Zika.
      ...

      http://www.citynews.ca/2016/08/03/no...ry-zika-virus/
      "Safety and security don't just happen, they are the result of collective consensus and public investment. We owe our children, the most vulnerable citizens in our society, a life free of violence and fear."
      -Nelson Mandela

      Comment


      • #4
        ...
        From Brock University in St. Catharines, Canada, Fiona Hunter has found signs that 11 out of 50 wild-caught Culex pipiens pipiens mosquitoes picked up the virus somewhere on their bodies. So far, she has completely analyzed one mosquito and reports that the virus was indeed in its saliva.
        ...
        https://flutrackers.com/forum/forum/...-zika-spreader
        "Safety and security don't just happen, they are the result of collective consensus and public investment. We owe our children, the most vulnerable citizens in our society, a life free of violence and fear."
        -Nelson Mandela

        Comment


        • #5
          Download

          Distribution of Culex pipiens mosquitos


          http://svs.gsfc.nasa.gov/vis/a000000/a002500/a002565/


          "Safety and security don't just happen, they are the result of collective consensus and public investment. We owe our children, the most vulnerable citizens in our society, a life free of violence and fear."
          -Nelson Mandela

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