Officials confirm flesh-eating New World screwworm parasite found in US wildlife

USDA says screwworm found in elk in Texas, and warns hunters and ranchers to be vigilant to help stop spread

Officials confirm flesh-eating New World screwworm parasite found in US wildlife

TL;DR

  • The USDA confirmed the first detection of the New World screwworm in US wildlife, an elk in Pecos County, Texas.
  • The parasite was found on a game ranch after the elk was harvested by a hunter.
  • The screwworm had been eradicated from the US decades ago but has surged north from Central America.
  • Previous efforts to prevent its spread included a ban on Mexican cattle imports, which has since been partially resumed.
  • Dozens of cases have been detected in the US this year, including on a calf, horse, and dog.
  • Authorities are increasing surveillance and urging hunters and landowners to be vigilant for signs of the screwworm.