Since the U.S. Department of Agriculture confirmed the first case of New World screwworm (NWS) in the United States on June 3, pet owners and shelters alike have expressed concern about what this might mean for their animals. Because the larvae of the parasitic fly infest wounds and can create signi ficant tissue damage if left untreated, veterinarians are encouraging shelters and pet owners, including those who work with colonies of stray or other unowned animals, to remain vigilant and stay informed, especially because NWS infestations can be easily prevented and treated. ...read more read less