Canada’s beef industry remains unaffected by the resurgence of New World screwworm in the United States, according to a spokesperson. However, farmers and ranchers in Canada are advised to take extra precautions following the recent detection of the flesh-eating parasite in Texas.
The Canadian Food Inspection Agency (CFIA) has announced temporary restrictions on livestock imports from affected areas in the U.S. after a calf in Texas tested positive for screwworm. The U.S. Department of Agriculture (USDA) confirmed additional cases in Texas and New Mexico.
While experts assure that the screwworm cannot survive the Canadian winter, Leigh Rosengren, Chief Veterinary Officer at the Canadian Cattle Association, commends the CFIA’s proactive measures to prevent the potential entry of the parasite into Canada.
Screwworm infestations were prevalent in the 1930s to the 1960s until the U.S. successfully eradicated them through innovative methods. The recent outbreak in Panama has raised concerns, with the parasite now detected in Texas after more than five decades.
Rosengren advises Canadian producers to enhance biosecurity protocols, especially for neonatal cows, and maintain close communication with veterinarians to monitor animal health effectively. While screwworm does not pose a direct food safety risk, safeguarding the national herd health is crucial.
The New World screwworm’s larvae feed on live tissue, posing a threat to various warm-blooded animals, including humans. The USDA has been actively releasing sterile flies to control the fly population and prevent further spread of the parasite.
Efforts to ramp up sterile fly production are underway, with significant investments made to combat the screwworm infestation in Central America and Mexico. Collaborative efforts with South American countries are being encouraged to eliminate the parasite from the region entirely.
Overall, while the immediate risk to Canadian agriculture is low, continued vigilance and cooperation are essential to address the screwworm threat effectively and safeguard the livestock industry.