New Mexico screwworm 'infested zones'

Three recent confirmed New World screwworm infections have prompted New Mexico officials to establish "infested zones," which demarcate where livestock owners must receive prior authorization before removing their animals from.

Livestock owners are further asked to stay vigilant about infections in the "adjacent surveillance" zones depicted below in gray.

Meanwhile, the United States Agriculture Department announced that it is resuming some cattle imports on Oct. 26, 2026, at New Mexico's ports of entry, including cattle imports at the Columbus port and horse imports at the Santa Teresa port.