FDA Authorizes Topical Spray for New World Screwworm Prevention

USDA APHIS News Releases

Published March 10th, 2026

Detected March 14th, 2026

Summary

The U.S. Food and Drug Administration has issued an Emergency Use Authorization (EUA) for F10 Antiseptic Wound Spray with Insecticide. This authorization allows for the prevention and treatment of New World screwworm infestations in multiple animal species, including cattle, sheep, goats, and horses.

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What changed

The U.S. Food and Drug Administration (FDA) has issued an Emergency Use Authorization (EUA) for F10 Antiseptic Wound Spray with Insecticide. This authorization permits the use of the spray for the prevention and treatment of New World screwworm (NWS) infestations, also known as myiasis, across a range of animal species. The affected species include cattle, sheep, goats, horses, and various wild and exotic mammals, as well as wild and pet birds.

This EUA represents a new tool for managing NWS, a parasitic infestation that can be detrimental to animal health and potentially impact livestock industries. Regulated entities, particularly veterinarians, livestock owners, and wildlife management authorities, should familiarize themselves with the conditions of the EUA and the proper application of the F10 Antiseptic Wound Spray for NWS prevention and treatment. While no specific compliance deadline is mentioned, prompt adoption of this authorized treatment is advisable given the potential impact of screwworm infestations.

What to do next

Review FDA's Emergency Use Authorization for F10 Antiseptic Wound Spray.
Consult with veterinarians regarding the appropriate use of the spray for New World screwworm prevention and treatment in applicable animal species.
Implement authorized treatment protocols as needed for affected animal populations.

Source document (simplified)

FDA Issues Emergency Use Authorization for Topical Spray to Prevent and Treat New World Screwworm in Multiple Species, Including Cattle, Sheep, Goats, Horses, Wild and Exotic Mammals, Wild and Pet Birds

Print Washington, D.C., March 10, 2026 —Today, the U.S. Food and Drug Administration issued an Emergency Use Authorization (EUA) for F10 Antiseptic Wound Spray with Insecticide (benzalkonium chloride, polyhexanide, and cypermethrin topical solution) for the prevention and treatment of New World screwworm (NWS) infestations (myiasis).