Canada has imposed temporary restrictions on livestock imports from Texas following the recent detection of New World screwworm in the state, a move aimed at preventing the spread of the destructive parasite into the country.
The Canadian Food Inspection Agency announced that livestock, including horses, will not be permitted to enter Canada if they originated in Texas or were present in the state within 21 days before crossing the border. The measures were implemented after the New World screwworm was confirmed in a calf in Texas, as The Dallas Express reported at the time.
Canadian officials said the action is intended to protect animal health and reduce the risk of introducing the parasite into Canada, where the pest is not found.
The flesh-eating larvae of the New World screwworm fly pose a serious threat to livestock, wildlife, pets, and, in rare cases, humans. The larvae burrow into the living tissue of animals, causing severe wounds that can lead to infection and death if left untreated.
Although Canadian officials noted that the country’s colder climate is not suitable for the long-term survival of the fly, they warned the parasite could survive for shorter periods during the summer months.
“Taking this action now is an appropriate risk mitigation measure to prevent its introduction and protect animal health,” the agency said in a news release.
The restrictions come as animal health officials continue monitoring the spread of New World screwworm in North America. The parasite, which is endemic to parts of South America and the Caribbean, has also been reported in Mexico. Canada already prohibits the importation of cattle, bison, sheep, goats, cervids, and swine from Mexico and maintains strict import requirements for horses entering from that country.
The U.S. Department of Agriculture recently confirmed additional New World screwworm cases in Texas, bringing the total number of detections in the state to four since the first confirmation on June 3.
The restrictions could have implications for livestock movement and rodeo events. Texas serves as a major hub for professional rodeo competitors and animals, and the 21-day requirement may affect participation in events such as the Calgary Stampede, scheduled for July 3-12.
Texas officials criticized Canada’s decision. After declaring a state of disaster over the threat posed by the parasite, a spokesperson for Texas Gov. Greg Abbott said the state and federal government were acting quickly to contain the outbreak.
“This pest affects live animals and does not impact inspected Texas beef,” spokesperson Andrew Mahaleris said, per USA Today. “Canada’s broad restriction on Texas livestock is an overreaction that is more political than science-based.”
Canadian authorities are encouraging livestock owners and veterinarians to watch for signs of infestation, including wounds that worsen over time and are accompanied by discharge or foul odors. Travelers taking companion animals to Texas are also being advised to inspect their pets regularly for symptoms.
Under Canada’s Health of Animals Act, New World screwworm is classified as an immediately notifiable disease. Animal owners who suspect an infestation are urged to contact a veterinarian, as laboratory testing is required to confirm the presence of the parasite.
Officials said they will continue working with U.S. counterparts to monitor developments and adjust import measures as needed.
