{"id":42898,"date":"2017-01-11T16:12:24","date_gmt":"2017-01-11T20:12:24","guid":{"rendered":"https:\/\/brocku.ca\/brock-news\/?p=42898"},"modified":"2017-01-11T16:12:56","modified_gmt":"2017-01-11T20:12:56","slug":"brock-team-discovers-insect-in-ontario-that-can-transmit-devastating-livestock-disease","status":"publish","type":"post","link":"https:\/\/brocku.ca\/brock-news\/2017\/01\/brock-team-discovers-insect-in-ontario-that-can-transmit-devastating-livestock-disease\/","title":{"rendered":"Brock team discovers insect in Ontario that can transmit devastating livestock disease"},"content":{"rendered":"

Ontario\u2019s livestock industry was rocked in September 2015 when a farm animal in Chatham-Kent tested positive for the bluetongue virus, a discovery that ultimately cost farmers millions of dollars.<\/span><\/p>\n

Now, Brock University researchers have confirmed that an insect able to transmit the devastating virus has made its way to southern Ontario.<\/p>\n

Graduate student Adam Jewiss-Gaines found hundreds of Culicoides sonorensis<\/em>, known as the biting midge, when he examined traps in a dozen locations from Niagara to Chatham-Kent.<\/p>\n

\u201cThis is a species that we didn\u2019t expect to find here,\u201d says Jewiss-Gaines, lead author of the team\u2019s paper, which is published in the Journal of Medical Entomology<\/em><\/a>. \u201cIt was mainly located in British Columbia, Alberta and parts of the U.S.\u201d<\/p>\n

He said biting midges are tiny and therefore not strong fliers, but wind currents from the U.S. may have brought the insect to the area. Another possibility is they arrived with a shipment of farm materials or livestock, hitching a ride with the animals they feed upon.<\/p>\n

The biting midge can carry the bluetongue virus, which causes immense suffering and death, primarily in sheep and deer. Symptoms include fever, swelling of the lips, difficulty swallowing and a swollen, purple-coloured tongue. Some animals bleed at the feet, causing them to walk on their knees.<\/p>\n

This is a species that we didn\u2019t expect to find here<\/span><\/p>\n

The Brock team\u2019s investigation started in 2012, when Jewiss-Gaines found biting midges caught in a trap in Thorold. He and his supervisor, medical entomologist Fiona Hunter, launched a project to see if the insect was present within southern Ontario. Graduate student<\/em> Larissa Barelli was also involved in the research, lending a hand with molecular work.<\/p>\n

In 2013, Jewiss-Gaines discovered <\/em>Culicoides sonorensis <\/em>in five traps between Niagara and Sarnia. In 2014, further traps in southwestern Ontario caught more biting midges. Finding t<\/em>he insect in consecutive years concerned researchers, as it was previously thought biting midges could not survive Canadian winters.<\/p>\n

Then, in September 2015, the Canadian Food Inspection Agency reported the Chatham-Kent farm animal had tested positive for bluetongue.<\/p>\n

\u201cThis created chaos in the livestock industry because international exports of live ruminants, and even exports of bull sperm, were immediately halted,\u201d says Hunter. \u201cIt cost our livestock producers millions of dollars, I\u2019d estimate.\u201d<\/p>\n

Cattle, goats and elk can be infected, but show few symptoms. They act as \u201creservoirs\u201d that the biting midge can tap into and spread to other livestock.<\/p>\n

\u201cThere are a lot of livestock farmers here in Ontario,\u201d says Jewiss-Gaines. \u201cBluetongue could be a real issue if it gets into flocks of sheep because the sheep here aren\u2019t used to it. They don\u2019t have the antibodies; if it gets into those flocks, it could be potentially decimating.\u201d<\/p>\n

Getting rid of biting midges is tricky, explains Jewiss-Gaines.<\/p>\n

\u201cThe larval forms exist in muddy, semi-aquatic environments. If we get a lot of precipitation, they might have a lot of areas to develop in. Biting midges are hard to control. You can\u2019t just go out there and get rid of all the mud.\u201d<\/p>\n

Jewiss-Gaines encourages farmers to keep their livestock in barns at dusk and dawn, when the midges are most active, and to put screens on barn windows.<\/p>\n

The paper, \u201cFirst Records of Culicoides sonorensis (Diptera: Ceratopogonidae), a Known Vector of Bluetongue Virus, in Southern Ontario<\/em>,\u201d can be seen online<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"

Ontario\u2019s livestock industry was rocked in September 2015 when a farm animal in Chatham-Kent tested positive for the bluetongue virus, a discovery that ultimately cost farmers millions of dollars.<\/p>\n","protected":false},"author":20,"featured_media":42899,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[3319,4052,188,41,1,4,5,4665],"tags":[4792,4794,4793,1356,894],"_links":{"self":[{"href":"https:\/\/brocku.ca\/brock-news\/wp-json\/wp\/v2\/posts\/42898"}],"collection":[{"href":"https:\/\/brocku.ca\/brock-news\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/brocku.ca\/brock-news\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/brocku.ca\/brock-news\/wp-json\/wp\/v2\/users\/20"}],"replies":[{"embeddable":true,"href":"https:\/\/brocku.ca\/brock-news\/wp-json\/wp\/v2\/comments?post=42898"}],"version-history":[{"count":2,"href":"https:\/\/brocku.ca\/brock-news\/wp-json\/wp\/v2\/posts\/42898\/revisions"}],"predecessor-version":[{"id":42901,"href":"https:\/\/brocku.ca\/brock-news\/wp-json\/wp\/v2\/posts\/42898\/revisions\/42901"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/brocku.ca\/brock-news\/wp-json\/wp\/v2\/media\/42899"}],"wp:attachment":[{"href":"https:\/\/brocku.ca\/brock-news\/wp-json\/wp\/v2\/media?parent=42898"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/brocku.ca\/brock-news\/wp-json\/wp\/v2\/categories?post=42898"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/brocku.ca\/brock-news\/wp-json\/wp\/v2\/tags?post=42898"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}