FOR IMMEDIATE RELEASE:
NM Livestock Board Contact: Dr. Samantha Holeck, State Veterinarian
Samantha.Holeck@nmlb.nm.gov | 505-841-6161
NMDA Contact: Jenny Green
Public Affairs Specialist
jgreen@nmda.nmsu.edu | 575-202-4249
October 23, 2026
**For ongoing updates on surveillance and infested zones, visit ScrewwormNM.org. New cases will be announced when confirmed in areas of the state not previously identified as infested.**
NM confirms New World screwworm case in Hidalgo County
HACHITA, N.M. – New Mexico animal health officials have confirmed a case of New World screwworm in a calf in Hidalgo County.
State and federal officials are continuing to expand surveillance and fly-trapping around affected locations to identify any additional cases and determine whether the pest has spread beyond the affected animals.
“Every confirmed case helps us better understand where New World screwworm may be present and where additional surveillance is needed,” said State Veterinarian Dr. Samantha Holeck with the New Mexico Livestock Board. “Producers are an essential part of that effort. Checking animals regularly and reporting suspicious wounds quickly can make a meaningful difference in identifying infestations before they spread.”
Officials have established a minimum 12.4-mile radius infested zone around the affected animal’s location. Within this zone, animals must be inspected and, if necessary, treated before moving within or out of the area.
“New Mexico’s livestock industry depends on the hard work of producers who care for their animals every day,” said New Mexico Secretary of Agriculture Jeff Witte. “As we head into cooler months, we cannot let our guard down. Staying alert now and maintaining strong surveillance through the winter will help us protect animal health and prepare for the months ahead.”
Animal owners should closely monitor animals for wounds that fail to heal, worsening injuries, maggots in wounds, foul-smelling discharge or unusual irritation around an injury. Anyone who suspects NWS should immediately contact the New Mexico Livestock Board and avoid moving the affected animal.
Additional information, maps of affected areas, reporting resources and updates are available at ScrewwormNM.org.
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