First New World Screwworm Case in the US in Six Decades

The New World Screwworm, a flesh-eating parasite, has re-emerged in the United States, with the first case confirmed in a calf in La Pryor, Texas, near the southern border. This marks the first detection of the parasite in the country since 1966, according to the US Department of Agriculture (USDA).

The infected calf, only three weeks old, had larvae found in its umbilical area. The USDA noted that efforts had been ongoing to prevent the parasite's arrival since outbreaks were reported in Central America and Mexico in recent years. To combat potential spread, authorities are establishing a 20-kilometer quarantine zone around the area.

Cattle ranchers have expressed concerns that an outbreak could threaten their herds, diminish beef production, and increase prices for consumers. USDA officials emphasized that while screwworms can infest humans and pets, the risk to people remains low, and cases are rare. Agriculture Secretary Brooke Rollins confirmed that personnel have been dispatched to South Texas to assist in emergency measures, urging livestock producers to remain vigilant. In addition, plans are underway to release millions of sterile flies to help control and mitigate further infestations.