TDA New World Screwworm FAQ

How Are New World Screwworm Infestations Treated?

Prevention & Treatment
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FDA Animal Drugs for New World Screwworm: This table combines FDA-approved, conditionally approved, and emergency-use-authorized animal drugs for the prevention or treatment of New World screwworm myiasis.

FDA Animal Drugs for New World Screwworm
Product	Status	Indication(s)	Species	Additional Information
Dectomax-CA1 (doramectin injection) injectable solution	Conditional Approval	Prevention and treatment of infestations caused by larvae of Cochliomyia hominivorax (myiasis), and prevention of reinfestation for 21 days in cattle.	Cattle	cNADA 141-616
Exzolt Cattle-CA1 (fluralaner) topical solution*	Conditional Approval	Prevention and treatment of infestations caused by New World screwworm (Cochliomyia hominivorax) larvae (myiasis) and treatment and control of cattle fever tick (Rhipicephalus microplus) in beef cattle 2 months of age and older and replacement dairy heifers less than 20 months of age.	Cattle	cNADA 141-617
Credelio Quattro-CA1 (lotilaner, moxidectin, praziquantel, pyrantel) chewable tablets	Conditional Approval	Treatment of infestations caused by New World screwworm (Cochliomyia hominivorax) larvae (myiasis) in dogs and puppies.	Dogs	cNADA 141-619
Credelio (lotilaner) chewable tablets	Emergency Use Authorization	Treatment of infestations caused by New World screwworm (Cochliomyia hominivorax) larvae (myiasis) in dogs and puppies.	Dogs	FOI Summary Letter of Authorization Fact Sheet for Veterinarians Granting Letter
Credelio CAT (lotilaner) chewable tablets	Emergency Use Authorization	Treatment of infestations caused by New World screwworm (Cochliomyia hominivorax) larvae (myiasis) in cats and kittens.	Cats	FOI Summary Letter of Authorization Fact Sheet for Veterinarians
Ivomec (ivermectin) injectable solution	Emergency Use Authorization	Prevention of infestations caused by New World screwworm (Cochliomyia hominivorax) larvae (myiasis) when administered within 24 hours of birth, at the time of castration, or at the appearance of wound in cattle, except for female dairy cattle producing milk for human consumption and calves that will be processed for veal.	Cattle	FOI Summary Letter of Authorization Fact Sheet
NexGard (afoxolaner) chewable tablets	Emergency Use Authorization	Treatment of infestations caused by New World screwworm (Cochliomyia hominivorax) larvae (myiasis) in dogs and puppies.	Dogs	FOI Summary Letter of Authorization Fact Sheet for Veterinarians
NexGard COMBO (esafoxolaner, eprinomectin, and praziquantel topical solution)	Emergency Use Authorization	Treatment of infestations caused by New World screwworm (Cochliomyia hominivorax) larvae (myiasis) in cats and kittens.	Cats	FOI Summary Letter of Authorization Fact Sheet for Veterinarians
F10 Antiseptic Wound Spray with Insecticide (benzalkonium chloride, polyhexanide and cypermethrin topical solution)*	Emergency Use Authorization	Prevention and treatment of infestations caused by New World screwworm (Cochliomyia hominivorax) larvae (myiasis) in cattle, horses, minor species of hoof stock, raptors and other wild birds, pet birds, and captive wild, exotic, and zoo mammals.	Cattle Horses Minor Species of Hoof Stock Raptors, Wild Birds, Pet Birds Captive Wild, Exotic, and Zoo Mammals	FOI Summary Letter of Authorization Fact Sheet
F10 Antiseptic Barrier Ointment with Insecticide (benzalkonium chloride, polyhexanide and cypermethrin topical ointment)*	Emergency Use Authorization	Prevention and treatment of infestations caused by New World screwworm (Cochliomyia hominivorax) larvae (myiasis) in cattle, horses, minor species of hoof stock, raptors and other wild birds, pet birds, and captive wild, exotic, and zoo mammals.	Cattle Horses Minor Species of Hoof Stock Raptors, Wild Birds, Pet Birds Captive Wild, Exotic, and Zoo Mammals	FOI Summary Letter of Authorization Fact Sheet
Negasunt Powder (coumaphos, propoxur, and sulfanilamide topical powder)*	Emergency Use Authorization	Prevention and treatment of infestations caused by New World screwworm (Cochliomyia hominivorax) larvae (myiasis) in cattle, swine, goats, sheep, horses, donkeys, domestic hybrid equids, and captive wild, exotic, and zoo mammals.	Cattle Swine Goats Sheep Horses Donkeys Domestic hybrid equids Captive Wild, Exotic, and Zoo Mammals	FOI Summary Letter of Authorization Fact Sheet Ficha Técnica (enlace a la traducción en español publicada por Elanco)
Dectomax/Dectomax-CA1 (doramectin injection)	Emergency Use Authorization	Prevention and treatment of infestations caused by New World screwworm (Cochliomyia hominivorax) larvae (myiasis) in dairy cattle (lactating dairy cows, dry dairy cows, replacement dairy heifers, 20 months of age and older) except for calves that will be processed for veal; and Prevention of infestations caused by New World screwworm (Cochliomyia hominivorax) larvae (myiasis) in horses one year and older, swine, sheep except lactating sheep, and deer.	Dairy Cattle Horses Swine Sheep Deer	FOI Summary Letter of Authorization Fact Sheet – Dairy Cattle, Swine, Sheep, Deer Fact Sheet – Horses

*extralabel use of this animal drug is not permitted

SOURCE: Food & Drug Administration

ADDITIONAL INFORMATION