Two small herds in Alberta were also confirmed to have occurred at the beginning of the month. The total number of cases in the state is currently 31. A flock of commercial poultry was also infected on April 6.
Authorities suspect that migratory birds are the cause of the global outbreak. According to Harris Ali, a professor of sociology at York University in Toronto who studies infectious diseases, the virus is common in seabirds and waterfowl, such as geese, gulls, and ducks.
However, according to Ali, as we are seeing, the virus can be transmitted to other species of birds, such as farm chickens. It is transmitted through the feces, mucous membranes and saliva of birds.
“On the farms of these factories where these animals are caged very close to each other, it is very easy for the virus to jump from one animal to the next, side by side in these conditions. “