Flesh-Eating Fly Returns to the United States Causing Concern

The New World screwworm, known for preying on livestock and other animals, has unexpectedly returned to the United States. This occurrence, happening 60 years after it was officially eradicated, is causing significant concern among farmers and scientists.

Federal officials announced the discovery of an infestation in a 3-week-old calf in Texas. The screwworm fly, whose larvae consume the tissue of various animals, can cause fatal infections if neglected.

An intensive eradication effort previously eliminated the flies from North and Central America. However, they remained prevalent in South America and have gradually migrated back north towards the U.S. border.

Cattle farmers are particularly anxious, as the screwworm has historically impacted cattle severely. Its resurgence could further challenge the livestock industry and potentially increase beef prices. Caleb Hubbard, an entomologist at New Mexico State University, expressed concern about the pest’s damaging effects on the livestock sector.

Screwworms are not selective about hosts. They can threaten wildlife, pets, and on rare occasions, humans.

Efforts to contain the infestation in Texas are underway. Federal and state authorities are working to minimize the risk to the public. Brooke Rollins, the agriculture secretary, assured that if treatment steps and movement restrictions are followed, there should be no permanent establishment of the pest.