After identification of H3N2 canine influenza in two recently imported dogs in Ontario, testing of a group of in-contact dogs was performed. Five more infected dogs were identified, including both dogs that developed signs of influenza and those that stayed healthy. Infection of these animals was expected since these dogs were in close contact with the index cases, and canine influenza is highly transmissible between dogs.
At this point, there is no evidence of any transmission beyond the initial household contacts. The affected dogs have been voluntarily confined, and since influenza virus shedding is transient, it is hoped that this has been contained. The affected dogs continue to be monitored and there is no evidence that other dogs have been exposed.