USDA Confirms New World Screwworm Cases in Crockett, Edwards Counties

TEXAS — Three new cases of New World screwworm have been confirmed in Texas as state and federal officials continue efforts to contain the parasite and prevent further spread.

The U.S. Department of Agriculture announced Sunday that the latest cases were detected in a lamb in Crockett County and two calves in Edwards County. The new detections bring the total number of confirmed New World screwworm cases in the United States this year to 15.

San Angelo recorded a confirmed case of New World screwworm on June 12 in a bovine located in northern Tom Green County between Grape Creek and Carlsbad.

New World screwworm is a parasitic fly whose larvae feed on the living tissue of warm-blooded animals. The pest can infest cattle, sheep, goats, deer, pets and other wildlife. In rare cases, people can also be affected.

According to the USDA, the latest Texas cases were identified through ongoing surveillance efforts. Officials said early detection and rapid treatment remain essential to limiting the parasite’s spread.

As part of containment efforts, the USDA is releasing millions of sterile male flies to interrupt reproduction and reduce screwworm populations. Officials said the strategy is intended to stop infestations from expanding into new areas.

The agency said it will continue monitoring for additional cases across Texas and other southern states.

State and federal officials are urging ranchers and livestock producers to routinely inspect animals for unusual wounds or signs of infestation and report suspected cases immediately to allow for a rapid response.

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