Senator Rounds has written to Secretary Vilsack, urging the USDA to thoroughly investigate the New World screwworm outbreak in Mexico before reopening the United States-Mexico feeder cattle trade. The detection of the parasite in a cow in southern Mexico has led to a halt in livestock imports from Mexico to prevent its spread. If the parasite were to infiltrate the U.S. cattle herd, it could negatively affect the industry and potentially lead to import bans from other countries.