Ficken said U.S. poultry producers, especially those in Texas, are always cautious about the potential for disease introduction from indirect contact with Mexican poultry.

“The level of security goes up when new virus outbreaks surface,” Ficken said.

John Glisson, DVM, PhD, director of research programs for the U.S. Poultry and Egg Association, said in a recent statement that "the US poultry industry would strongly agree with the idea that the disease should be dealt with quickly and that quarantine of these farms and elimination of infected flocks would be a prudent measure."

Nearly 20 million birds were destroyed in Canada in 2004 when highly pathogenic H7N3 outbreaks in British Columbia’s Fraser Valley occurred, leading to the culling of nearly 20 million birds. In addition, two related human infections were confirmed when poultry workers, both men, had been exposed to infected poultry on the farms. They were the first known H7N3 infections in humans. Both had conjunctivitis with mild flu-like symptoms and recovered without major incident.