The U.S. has closed its southern border again to livestock imports, saying a flesh-eating parasite has moved further north in Mexico than previously reported. Mexico's president was critical Thursday,

Secretary Rollins takes decisive action and shuts down U.S. Southern border ports to livestock trade due to further northward spread of New World screwworm in Mexico.

The U.S. has shut its southern border to livestock imports again after a flesh-eating parasite was found further north in Mexico than previously reported, raising alarm among American agriculture officials.