CDC Issues Health Alert as 'Flesh-Eating' New World Screwworm Nears Texas Border

A parasitic threat that literally eats its victims alive is marching toward the U.S. border. The U.S. Centers for Disease Control and Prevention (CDC) issued a high-level health alert on Tuesday, January 20, 2026, warning that the New World Screwworm (NWS) is approaching the Texas border from Mexico.

New World Screwworm Texas Border Threat Escalates

According to the agency's Health Alert Network, the parasite has been felling an increasing number of animals in the bordering Mexican state of Tamaulipas. The New World Screwworm is notoriously savage, laying up to 400 eggs at a time in the open wounds or mucous membranes of warm-blooded animals. These eggs hatch into larvae that twist and bore into living flesh like screws, consuming their hosts while they're still alive.

Clinical Guidance and Emergency Protocols

The CDC has directed doctors and veterinarians to be on high alert for patients with wounds teeming with these maggots. Treatment is grueling: every single larva must be manually removed. It's a critical protocol, as allowing even one parasite to escape could lead to a domestic outbreak. Without intervention, these infestations are often fatal for both livestock and humans.