FDA issues Emergency Use Authorizations for NWS meds for dogs, catsFebruary 23, 2026The FDA has authorized a chewable for dogs and puppies and a topical solution for cats and kittens to treat New World screwworm infestations. The EUAs enable veterinarians to respond quickly to suspected cases and support U.S. animal health preparedness efforts.
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FDA conditionally approves drug for New World screwworm infestation in dogsDecember 23, 2025The U.S. Food and Drug Administration (FDA) conditionally approves Credelio Quattro-CA1 for treating New World screwworm (NWS) infestations in young dogs and puppies.
FDA conditionally approves drug for treatment of New World screwworm in cattleDecember 8, 2025The fluralaner topical solution is for the prevention and treatment of infestations caused by New World screwworm (Cochliomyia hominivorax) larvae (myiasis), as well as for the treatment and control of cattle fever tick (Rhipicephalus microplus).
FDA grants Emergency Use Authorization for feline screwworm treatmentNovember 21, 2025With Credelio CAT, veterinarians and pet owners can now take proactive steps to prevent wounds that can create ideal conditions for New World Screwworm (NWS) infection in cats.
FDA authorizes emergency use of drug to treat New World Screwworm in dogsOctober 28, 2025The agency concluded that “based on the scientific evidence available, it is reasonable to believe that Credelio may be effective in treating New World screwworm (NWS) infestations in dogs and puppies and the known and potential benefits of the product outweigh its known and potential risks.”
USDA expands efforts to combat deadly New World ScrewwormAugust 19, 2025The USDA will build a sterile fly facility in Edinburg, Texas, to combat NWS. The agency is also investing $100 million in new technologies, traps, and treatments to strengthen biosecurity.
Officials warn of screwworm, prompts monitoring along South Texas borderJanuary 7, 2025While the New World screwworm (NWS) has been eradicated from the U.S. since 1966, constant efforts are on-going to control the spread of the flesh-burrowing parasite.
