A close up of the New World screwworm, a parasitic pest that threatens livestock.
(Image credit: Discovery Access via Getty Images)
A fly that deposits its parasitic, flesh-eating offspring inside cows has been detected in Texas for the first time in decades, the U.S. Department of Agriculture (USDA) reported Wednesday (June 3).
A second case in a cow in the same county was announced June 5, and two more cases — in a cow and dog — in other Texas counties were flagged on June 8. Another cow case was announced June 9, bringing the total to five.
Nicoletta Lanese is the health channel editor at Live Science and was previously a news editor and staff writer at the site. She is a recipient of the 2026 AHCJ International Health Study Fellowship, with a project focused on antibiotic stewardship practices in Japan and the U.S. They hold a graduate certificate in science communication from UC Santa Cruz and degrees in neuroscience and dance from the University of Florida. Beyond Live Science, Lanese's work has appeared in The Scientist, Science News, the Mercury News, Mongabay and Stanford Medicine Magazine, among other outlets. Based in NYC, she also remains involved in dance and performs in local choreographers' work.
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