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Two Cases of New World Screwworm Reported in Doña Ana County

Officials are expanding fly-trapping and surveillance as they seek additional cases and work to keep the pest from spreading.

  • On Tuesday, New Mexico agriculture officials confirmed two additional New World screwworm cases in Doña Ana County. Authorities established a 12.4-mile infested zone in Las Cruces and expanded fly-trapping efforts on the New Mexico State University campus.
  • The screwworm's reemergence last year has raised significant concerns for the cattle industry across Mexico, Arizona, Texas, and New Mexico. These two new cases follow four confirmed cases reported last week in Otero and Grant counties.
  • Animals within infested zones must undergo inspection within five days of movement, state and federal agriculture officials report. Livestock owners should monitor for wounds failing to heal or maggots and avoid handling affected animals.
  • USDA Under Secretary for Marketing and Regulatory Programs Dudley Hoskins urged public vigilance, stating, "We have the tools to beat it." The agency continues phased port reopenings while prioritizing containment efforts in affected regions.
  • Residents can view the current infested-zone map and find updates on surveillance efforts at ScrewwormNM. Officials continue identifying additional cases and determining whether the pest has spread beyond affected animals.
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Santa New MexicanSanta New Mexican
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Las Cruces added to ‘infested zone’ as New World screwworm spreads

Within the infested zones, animals must be inspected and, if necessary, treated before being moved in or out of the area.

·Santa Fe, United States
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NM agricultural authorities announce two cases and create a new infected area in Doña Ana County

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Las Cruces Sun-News broke the news in Las Cruces, United States on Monday, October 26, 2026.
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