FDA Approves First Drug for New World Screwworm in Cattle: Dectomax-CA1 In a major step forward for livestock health and protection, the U.S. Food and Drug Administration (FDA) has conditionally approved the first drug in the U.S. for the prevention and treatment of New World Screwworm (NWS). “The U.S. Food and Drug Administration has conditionally approved the first drug for …