Mexico has reported a case of a flesh-eating parasite in a new state — one that shares a border with the United States.
More than a year after Mexico’s first reported case of the New World screwworm, the deadly parasite has been discovered in a cow in the Mexican state of Tamaulipas.
Tamaulipas shares a long stretch of border with Texas. The United States closed the U.S.-Mexico border to cattle for much of 2025 in an effort to protect its herds from the parasite, which so far has not been reported in the United States.