West Nile Virus

West Nile virus (WNV) belongs to a family of viruses called Flaviviridae. It is spread by mosquitoes that have fed on the blood of infected birds. WNV can infect a variety of mammals, including horses, humans and domestic and wild birds (particularly crows, blue and grey jays, ravens and magpies).

In Canada, West Nile Virus is an immediately notifiable disease under the Health of Animals Regulations. Only laboratories are required to contact the Canadian Food Inspection Agency (CFIA) regarding the suspicion or diagnosis of one of these diseases.

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