Flesh-Eating Fly Infestation Detected in U.S. Cattle for First Time in 60 Years

A flesh-eating fly infestation has been detected in U.S. cattle for the first time in over 60 years, raising alarms among livestock producers and veterinary health officials. The pest, known as the New World screwworm (Cochliomyia hominivorax), was identified in a herd in southern Texas, prompting immediate quarantine and eradication measures by the U.S. Department of Agriculture. The fly larvae burrow into living tissue, causing severe wounds and often death if untreated. The outbreak is believed to have originated from stray animals crossing the U.S.-Mexico border. Officials have activated emergency response protocols, including sterile insect release and movement restrictions on livestock. This marks a significant re-emergence of a pest that was declared eradicated in the U.S. in 1966.

Global Impact

Economically, the outbreak threatens the $100 billion U.S. cattle industry, with potential losses from livestock mortality, quarantine costs, and trade restrictions. Mexico and Canada may impose temporary bans on U.S. cattle imports, disrupting North American beef supply chains.