US Confirms First New World Screwworm Case, Advises Pet Owners to Stay Vigilant

The U.S. Department of Agriculture announced on June 3 that the first confirmed case of New World screwworm (NWS) has been detected in the United States. The parasitic fly’s larvae are known to infest open wounds, causing significant tissue damage if left untreated. The confirmation has prompted pet owners and animal shelters to express concern about the potential risk to their animals.

Veterinarians are urging shelters, rescue groups, and private pet owners—especially those working with stray or unowned animals—to remain vigilant. They stress that NWS infestations can be easily prevented through proper wound care and promptly treated with appropriate veterinary interventions. Early detection and treatment are critical to avoid the severe tissue damage associated with the larvae.

The USDA and veterinary community are monitoring the situation closely and providing guidance on prevention and treatment protocols. Pet owners and shelters are encouraged to stay informed and follow recommended practices to protect animals from this newly identified threat.