New Case of New World Screwworm Reported in Texas

U.S. agriculture officials confirmed a new case of the New World screwworm in Texas on Monday, raising concerns about containing the flesh-eating parasite. Known for its larvae that consume living tissue, the organism was eradicated in the country decades ago through a sterile-fly release campaign. The discovery occurs amidst heightened surveillance and response in areas impacted within the U.S.

The U.S. Department of Agriculture communicated with Newsweek on Monday night for further inquiry.

Recent Developments

In a statement on platform X, the USDA’s screwworm emergency response team confirmed the recent case in a goat. “The case was identified in a castration site wound. NWS only infests open wounds and does not impact healthy skin. This detection is about 180 miles west of the initial site in Texas and 74 miles west of the nearest past confirmed case,” revealed the post.

In nearby Mexico, around 30,000 cases have been recorded since November 2024, with 1,800 still ongoing. In the U.S., the tally stands at 16.

Per the USDA’s screwworm tracking dashboard, affected species in the U.S. include cattle, sheep, goats, and one dog. The latest confirmation is from Terrell County, Texas. A prior case was validated Sunday in Edwards County, Texas.

The isolated instance in New Mexico related to a dog is inactive, according to USDA data. The current situation is provoking concerns among ranchers and animal health specialists who received reports of screwworm appearances across North and Central America.

Response teams have amplified inspections, outreach programs, and containment actions, including the application of sterile insect techniques historically effective against screwworm propagation. Authorities are urging livestock owners to report unusual wounds and infestations timely.

Understanding New World Screwworm

The New World screwworm is a species of fly laying eggs in open cuts or body openings like eyes, genitals, and mouth, disclosed the U.S. Centers for Disease Control and Prevention. Hatched eggs morph into maggots that consume living tissues.

History of Screwworm in the U.S.

Previously prevailing in the Southern U.S., the New World screwworm incurred substantial livestock losses before eradication efforts using sterile male fly releases brought cases to nil in 1982, notes NBC News.

Current Outbreak Location

In Central America and parts of Mexico, federal reports indicate screwworm progression northward. Confirmed U.S. cases have surfaced in Texas and New Mexico, as of Monday.

For any updates, contact Newsweek editors Anna Commander and Edward Cummins.