Two additional cases of New World screwworm have been confirmed in New Mexico, raising concerns about the spread of the flesh-eating livestock parasite.
The latest cases involve a horse and a calf in Grant County, bringing New Mexico’s reported total to four since the pest returned to the United States this summer.
Agriculture officials have established infested zones extending at least 12 miles around affected locations. Livestock within those areas must be inspected and treated when necessary before they can be moved.
New Mexico State Veterinarian Samantha Holeck says officials are increasing surveillance and working with state and federal partners to investigate the cases and prevent additional spread.
New World screwworm larvae can infest wounds in livestock and other warm-blooded animals, feeding on living tissue and potentially causing serious injury.
Livestock owners are being urged to closely inspect their animals. Warning signs include wounds that fail to heal, foul-smelling discharge and unusual irritation.
Agriculture officials say early detection and reporting are critical to containing the parasite and preventing it from spreading to additional livestock populations.