Mexico recorded 6,703 cases of animals infested with New World screwworm as of September 13 since the start of the outbreak in November of last year. That was compared to 5,086 confirmed cases during the previous period, which ended August 17.

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.
Sterile flys to keep infection out of U.S.