On Nov. 22, Mexico’s Chief Veterinary Officer informed USDA about a confirmed case of New World screwworm (NWS) in Chiapas, near the Guatemala border. These fly larvae infest warm-blooded animals, including humans, causing severe infections.
USDA’s Animal and Plant Health Inspection Service (APHIS) has heightened import restrictions on animal products from Mexico and intensified efforts in Central America to contain the pest’s spread. APHIS is collaborating with regional partners, releasing sterile flies and maintaining vigilance along the southern U.S. border.
Producers are urged to inspect livestock and pets for signs of infection, such as wounds or larvae, and report suspected cases promptly. Human infections, though rare, require immediate medical attention.
“Although USDA eradicated NWS from the United States in 1966 using sterile insect technique, there is a constant risk of re-introduction into the United States,” APHIS stated on the agency’s website.
Market Impact:
This will primarily impact feeder cattle imports from Mexico, and feeder cattle prices popped on the news. Mexico ships around 100,000 head a month to the U.S. The trade is seasonable, and we are on the backside of the Fall season. The restrictions are estimated to be in force for at least a month, sources note.
One trade source said, “Feeder cattle supply in the January inventory could show a 1.2 million head reduction. Anything to shorten Mexico supplies is important.”
USDA’s Preventive Measures
APHIS has taken several steps to protect U.S. livestock and wildlife from the New World Screwworm:
• Enhanced import restrictions: Stricter controls have been placed on animal products entering the U.S. from Mexico.
• Increased surveillance: APHIS is likely to have intensified monitoring at border crossings and ports of entry.
• Collaboration with Mexican authorities: USDA is working closely with Mexican officials to address the situation at its source.
Impact on Trade and Travel
The detection of New World Screwworm in Mexico and the subsequent USDA actions may have significant implications:
• Trade disruptions: Importers of Mexican animal products may face delays or restrictions.
• Travel advisories: Travelers returning from Mexico might encounter additional screening measures for pets or animal-derived goods.
Background:
New World Screwworm is a serious veterinary pest that can cause severe damage to livestock and wildlife populations. Its detection in Mexico represents a potential threat to animal health in the region, necessitating swift and coordinated action from agricultural authorities on both sides of the border.
USDA’s proactive approach underscores the importance of international cooperation in preventing the spread of agricultural pests and diseases. As the situation develops, further updates from APHIS and other USDA agencies are expected to guide stakeholders and the public on necessary precautions and compliance with new regulations.
