(NAFB.com) – The USDA is again closing southern ports of entry to shipments of cattle due to the detection of New World screwworm in Veracruz, Mexico. USDA discovered the new case in Veracruz, indicating that the screwworm has traveled 160 miles northward of the location where sterile flies are currently being dropped. “The New World screwworm’s northern movement jeopardizes the safety of American agriculture, which is why Secretary Rollins paused cattle movement again until we can push the pest further from the southern U.S. border,” said NCBA CEO Collin Woodall. “Unfortunately, screwworm continues moving north through Mexico, and it’s clear that the U.S. needs a sterile fly facility of our own here at home.” He also said America can’t afford to wait any longer and strongly urged USDA to immediately begin work on a sterile fly facility. Moore Air Base in Texas will be the site of a new sterile fly facility.