Mexico’s active cases of New World screwworm, which have kept the U.S. border closed to Mexican cattle imports, have fallen 57 per cent since mid-December.
U.S. border has been closed to Mexican cattle since July due to New World screwworm cases
Human screwworm case was Maryland resident who recovered, state health department says
USDA criticized by cattle producers for failing to take timely measures to prevent screwworm from entering the U.S.