The United States Department of Agriculture has confirmed the detection of the New World screwworm fly in Texas, marking a significant reappearance of a parasite that was eradicated from the country decades ago. The discovery has prompted an expanded disaster declaration as federal and state officials move to contain any potential spread of the pest.

The New World screwworm, Cochliomyia hominivorax, is a parasitic fly whose larvae feed on the living tissue of warm-blooded animals. Prior to its eradication in the United States in 1966, the pest caused severe economic damage to the livestock industry and posed health risks to wildlife and humans. Its larvae can infest open wounds of animals and, in rare cases, people.

The USDA confirmed a second screwworm fly case in Texas, escalating official concern that the pest may be establishing a foothold. Authorities are conducting surveillance and deploying sterile insect technique programs — the same method used in the original eradication effort — in response to the findings. Cattle and other livestock in affected areas are being monitored closely.

The reappearance is particularly alarming given the fly's history of devastating livestock populations. Experts note that the pest is endemic in parts of Central and South America, and its reintroduction could threaten the U.S. beef supply chain if not rapidly controlled. Agricultural officials have urged livestock owners in Texas to inspect their animals carefully for signs of infestation.

Health authorities stress that while human cases are rare, they are possible, particularly in individuals with open wounds who are exposed to areas with active fly populations. The expanded disaster declaration is intended to free up additional federal resources for containment, surveillance, and public education efforts.