New World Screwworm (NWS)

Latest news and updates on New World Screwworm (NWS). New World Screwworm (NWS) is a destructive livestock pest that poses risks to agriculture, animal health, and food security. New World Screwworm flies lay eggs that hatch into larvae, which burrow into the flesh of living animals. Infestations can cause severe wounds, life-threatening infections, and, in many cases, death.