A flesh-eating parasite that feeds on warm-blooded animals has been detected in the United States for the first time since 1966, exposing the nation's cattle herd to a serious new threat, the US Department of Agriculture has said.

The U.S. Department of Agriculture has confirmed that the New World screwworm fly has arrived in south Texas

The U.S. Department of Agriculture has confirmed that the New World screwworm fly has arrived in south Texas

The flesh-eating larvae has threatened the nation's cattle industry