New World Screwworm Found in Texas Elk

Source reports published 21 Oct 2026, 10:00 am – 22 Oct 2026, 10:01 am AEST

The USDA confirmed the first detection of the New World screwworm parasite in US wildlife, specifically in an elk in Pecos County, Texas. The Texas Animal Health Commission is modifying an infested zone and conducting surveillance alongside the USDA and Texas Parks and Wildlife Department.

What happened

• The U.S. Department of Agriculture confirmed the presence of the New World screwworm parasite in a single elk located on a game ranch in Pecos County, Texas.
• The elk was harvested by a hunter, triggering the initial detection.
• The Texas Animal Health Commission will adjust the previously established infested zone.
• The USDA, in collaboration with the Texas Parks and Wildlife Department, is implementing additional wildlife surveillance in the area.
• Spokesperson Alan Cain urged hunters and landowners to be vigilant for signs of the screwworm, including visible maggots, foul-smelling injuries, and distressed animals.
• The USDA previously confirmed the presence of the screwworm in a calf in Zavala County, Texas, in June.
• The parasite, which has surged north from Central America, lays eggs in open wounds and feeds on living tissue.
• While the USDA stated that the parasite does not affect food safety, it can impact meat production.

Original reporting

• Guardian: Officials confirm flesh-eating New World screwworm parasite found in US wildlife
  2026-10-21T00:00:00+00:00
• CBS News: First case of New World screwworm in U.S. wildlife confirmed in Texas elk, USDA says
  2026-10-22T00:01:18+00:00