Screwworm Infestation Spreads in US Southwest

South Texas Residents and Wildlife Face New Threat: New World Screwworm

A concerning pest, the New World screwworm, has been detected in South Texas, prompting concerns for local livestock and wildlife. Initially identified in June 2026, the infestation has since spread northward within the state. According to recent reports, the pest has also been spotted in neighboring New Mexico, highlighting the potential for further expansion.

The New World screwworm, a parasitic fly, is notorious for its ability to inflict severe damage on its hosts, including livestock and wildlife. It lays its eggs in open wounds, which then hatch into larvae that feed on the host's tissue, causing significant harm and potentially fatal consequences. The rapid spread of the infestation in Texas and its recent detection in New Mexico underscores the need for swift action to prevent further dissemination.

As authorities work to contain the infestation, residents and farmers in affected areas are advised to be vigilant and report any suspected cases to relevant authorities. The Texas Department of Agriculture and the United States Department of Agriculture (USDA) are collaborating to implement control measures and mitigate the impact of the New World screwworm on local ecosystems.