The U.S. Food and Drug Administration has issued Emergency Use Authorizations (EUAs) allowing the use of NexGard (afoxolaner) Chewables for treating New World screwworm (NWS) infestations in dogs and puppies, and NexGard COMBO (esafoxolaner, eprinomectin, and praziquantel topical solution) for treating NWS in cats and kittens. The authorizations permit veterinarians to dispense these products during the public health emergency period. NWS (Cochliomyia hominivorax) is a parasitic fly whose larvae can cause severe tissue damage when they infest open wounds. Although the parasite is not currently present in the United States, recent cases have been confirmed in livestock in northern Mexico, prompting federal preparedness efforts. “Preparedness isn’t optional when it comes to emerging animal health threats,” says Daniel Watkins, Head of U.S. Pet at Boehringer Ingelheim, in a statement. “Readiness matters. These authorizations ensure veterinarians have access to treatment options the moment they are needed. We appreciate FDA’s leadership in strengthening U.S. preparedness and helping protect the animals who rely on us.” Steve Maschmedt, executive director, Pet Veterinary Technical Services, noted that “Screwworm infestations can escalate quickly, and treatment delays put animals at real risk.” He emphasized the importance of having authorized treatment options available and maintaining routine flea and tick control. Both products are authorized to be dispensed only by, or on the order of, a licensed veterinarian.
