The U.S. Department of Agriculture (USDA) confirmed a new case of the New World screwworm in Terrell County, Texas, on Monday, marking the latest detection in a growing outbreak. The flesh-eating parasite, which feeds on living tissue, was previously eradicated in the U.S. but has resurfaced in recent months.
Immediate Action & Core Facts
The USDA announced the detection in a goat with a castration site wound, emphasizing that the screwworm only infests open wounds and does not affect healthy skin. This case is approximately 180 miles west of the initial Texas detection and 74 miles west of the nearest previously confirmed case. The total number of active U.S. cases has risen to 16, with 15 in Texas and one inactive case in New Mexico involving a dog.
Deeper Dive & Context
Outbreak Details
The USDA reported three additional cases in Texas on June 21, involving a lamb in Crockett County and two calves in Edwards County. The agency has begun releasing sterile flies in affected areas to suppress the screwworm population, a method historically effective in eradication efforts. Mexico has reported nearly 30,000 cases since November 2024, with 1,800 still active.
Response and Containment
Response teams have intensified inspections, public outreach, and containment activities. Livestock owners are urged to report suspicious wounds promptly. The USDA has emphasized aggressive eradication efforts alongside state partners to combat the outbreak.
Impact on Livestock
The confirmed U.S. cases involve cattle, sheep, goats, and one dog. The screwworm poses a significant threat to livestock health, prompting heightened surveillance and response measures in affected regions.