The ripple effects from the recent New World screwworm detections in Texas are now extending beyond the U.S. border.
According to reporting by Feed Strategy, the Canadian Food Inspection Agency (CFIA) has implemented temporary restrictions on certain livestock imports from Texas following the recent confirmation of the flesh-eating parasite in the state.
Under the new policy, livestock originating from Texas — or animals that have been present in Texas within 21 days of export — will face additional import restrictions when entering Canada. Feed Strategy reported that Canadian officials described the move as “a precautionary measure,” designed to prevent the spread of the parasite into Canadian livestock populations.
The restrictions follow the USDA’s confirmation of multiple New World screwworm cases in Texas – the first U.S. detections in decades. Federal and state authorities have responded with quarantines, animal movement controls, surveillance efforts and expanded sterile-fly release programs.
According to the CFIA, the restrictions will remain in place while officials evaluate the evolving situation and monitor containment efforts south of the border. Similar details were reported by CityNews Canada and Global News.
The New World screwworm is the larval stage of a parasitic fly that feeds on living tissue in warm-blooded animals. While it poses a serious threat to livestock health, USDA officials have repeatedly emphasized that it does not represent a food safety risk for consumers.
The Canadian action represents another sign that North American regulators are treating the outbreak with increasing urgency.
The United States has already maintained restrictions on certain livestock imports from Mexico because of the parasite’s northward movement through Central America and Mexico. U.S. Agriculture Secretary Brooke Rollins suspended imports of live cattle, horses, and bison through southern border ports in 2025 after officials warned that containment efforts in Mexico were proving insufficient.
For U.S. grocery retailers, the immediate impact is likely to be limited. However, the development underscores the broader concern facing the North American cattle industry. Beef supplies are already historically tight, and additional animal-health restrictions could create further pressure on livestock movements, cattle markets, and long-term beef production if the outbreak expands. Reuters recently reported that economists have estimated a widespread infestation could inflict as much as $1.8 billion in economic damage.
Here’s Why It Matters
Canada’s decision shows that the screwworm issue is becoming a concern for the continental livestock market.
While food safety remains unaffected, the combination of U.S. quarantines, Mexican import restrictions, and now Canadian livestock controls highlights how quickly animal-health events can influence cattle movements and supply chains. For food retailers already facing elevated beef costs and historically low cattle inventories, the situation bears close watching as summer progresses.
