Ontario Animal Health Network

06/24/2026

"The 8,735 ticks reported in Ontario so far this year is a 50.2 per cent increase over the same period in 2025, while the 3,126 reports of blacklegged ticks is a staggering 72.8 per cent jump over the previous year."

https://www.ctvnews.ca/health/article/tick-reports-are-surging-in-canada-these-areas-are-most-affected/

Tick reports are surging across Eastern Canada this year and experts expect the troubling trend to continue.

06/23/2026

Dr. Katie Clow (OVC) is heading up a new OAHN project, investigating an increase in reports of brown dog ticks in Ontario. Shipping costs are covered.

Details and contact info available here:

https://www.oahn.ca/resources/oahn-companion-animal-project-surveillance-of-rhipicephalus-spp-and-haemaphysalis-longicornis-in-dogs-in-ontario/

06/11/2026

New World screwworm confirmed in dog in New Mexico as Texas reports 3 new cases

"Caused by the larvae of Cochliomyia hominivorax, a parasitic fly, NWS is a serious threat to livestock, wildlife, pets, and, in rare cases, people."

https://www.cidrap.umn.edu/new-world-screwworm/new-world-screwworm-confirmed-dog-new-mexico-texas-reports-3-new-cases

US Department of Agriculture (USDA) officials have confirmed New World screwworm (NWS) in a dog in New Mexico, and Texas has three more detections, in a goat and two calves. So far, the United States has six detections of the parasitic fly in the past week. 

06/10/2026

Ontario Equine Disease Alert

-EHV-1 found in Simcoe County

More details, and full list of Ontario equine disease alerts available here:

https://www.oahn.ca/resources/ontario-equine-disease-alerts/

06/08/2026

The Canadian Food Inspection Agency implements disease control measures to prevent spread of New World screwworm

CFIA announced that it will implement temporary import restrictions on livestock, including horses, from entering Canada from affected areas

Following a confirmed finding of New World screwworm in a calf in Texas, the Canadian Food Inspection Agency (CFIA) announced today that it will implement temporary import restrictions on livestock, including horses, from entering Canada from affected areas.

06/04/2026

USDA Confirms Presence of New World Screwworm in the United States

The U.S. Department of Agriculture’s (USDA) Animal and Plant Health Inspection Service (APHIS) confirmed the detection of a New World screwworm (NWS) in a bovine in Zavala County, Texas.

https://bit.ly/4o5Yyf4

06/03/2026

"While there are currently no human cases in the region, a positive local bird suggests mosquitoes carrying the virus may be present and residents should take precautions to reduce the risk of bites."

https://wdgpublichealth.ca/news/media-release-dead-crow-guelph-positive-west-nile-virus

June 2, 2026: A dead crow found in the City of Guelph has tested positive for West Nile virus (WNV). While there are currently no human cases in the region, a positive local bird suggests mosquitoes carrying the virus may be present and residents should take precautions to reduce the risk of bites.....

05/22/2026

Last Chance - Survey closes Sunday

Ontario Small Animal Vets and RVTs

Please complete the Companion Animal veterinary survey and let us know what you have been seeing in practice. Your responses help with disease surveillance, research, and more!

https://uoguelph.eu.qualtrics.com/jfe/form/SV_cx0XfILdDxH3Xoy

05/14/2026

Ontario Small Animal Vets and RVTs - 1 week left!

Please complete the Companion Animal veterinary survey and let us know what you have been seeing in practice. Your responses help with disease surveillance, research, and more!

https://uoguelph.eu.qualtrics.com/jfe/form/SV_cx0XfILdDxH3Xoy

05/04/2026

Ontario Small Animal Vets and RVTs - we want to hear from you!

Please complete the Companion Animal veterinary survey and let us know what you have been seeing in practice. Your responses help with disease surveillance, research, and more!

https://uoguelph.eu.qualtrics.com/jfe/form/SV_cx0XfILdDxH3Xoy (link in bio)