Flesh-Eating Screwworms

Flesh-Eating Parasitic Fly Reemerges in US After 60 Years; USDA Deploys Sterile Insect Technique

The New World screwworm, a parasitic fly that feeds on living tissue, has returned to the US after 60 years. Confirmed in a Texas calf, the USDA is combating the threat by releasing sterile male flies to prevent reproduction.