West Nile Virus in livestock

Overview

West Nile Virus (WNV) is a mosquito-borne virus that can cause swelling and inflammation of the brain and spinal cord in equids, such as horses, donkeys, mules, and zebras, as well as birds and humans. Only specific species of mosquitoes spread WNV. At present in Alberta, the species of mosquito of greatest concern is Culex tarsalis, which becomes infected when feeding on infected wild birds. Wild birds are the primary reservoir of WNV. Most wild birds are not affected by the virus, but rather just carry the virus for a variable period of time.

See also:

• West Nile Virus and wildlife
• Information on WNV in people – West Nile virus and surveillance

Only equids and some domestic geese and ducks appear to be severely affected with clinical infection from WNV. Preventive measures should be discussed with your local veterinarian.

• See WNV symptoms, treatment and prevention in livestock: West Nile Virus fact sheet

How to report

All suspected or confirmed cases of WNV must be reported to the Office of the Chief Provincial Veterinarian (OCPV) within 24 hours.

WNV is a provincially notifiable disease for horses, donkeys and mules and must be monitored. Statistics on cases are available at the provincially notifiable disease link or through the Canadian Animal Health Surveillance System.

Hours: 8:15 am to 4:30 pm (open Monday to Friday, closed statutory holidays)
Phone: 780-427-3448
Toll free: 310-0000 before the phone number (in Alberta)
Fax: 780-415-0810

Related

• West Nile Virus (Canadian Food Inspection Agency)