Quick Takeaways:
- Elanco received FDA Emergency Use Authorization (EUA) for CLiK Extra (dicyclanil topical suspension) wound spray to prevent infestations of New World screwworm larvae in sheep, cattle, goats, swine, camelids, captive and captured cervids, American bison, bighorn sheep and Sonoran pronghorn. The product can be applied on or around wounds, including those caused by birth and surgical procedures.
- CLiK Extra is designed to prevent larvae from infesting wounds before an infestation occurs and has not been shown to treat active screwworm infestations. The authorization adds to Elanco’s existing emergency products, Negasunt Powder and Tanidil, approved earlier this year for prevention and treatment, while Catron IV remains an EPA-registered option for treating screwworm and controlling screwworm flies and maggots across several livestock species
- The authorization comes as the New World screwworm reemerges in the U.S., creating a significant threat to livestock, wildlife and other warm-blooded animals. CLiK Extra will be available through standard product channels to animal health professionals, livestock producers and those managing captive or captured wildlife
Why It Matters?
The authorization expands Elanco’s screwworm portfolio beyond Negasunt Powder and Tanidil (earlier emergency tools) and complements EPA‑registered Catron IV, creating a more complete prevention-plus-treatment toolkit as USDA tracks dozens of animal cases and the outbreak continues to spread. Because CLiK Extra is OTC and available through standard channels, it can be adopted quickly for high‑risk procedures and herds, though the 86‑day slaughter withdrawal and the need for separate treatment options for active infestations mean it will be used as part of a broader biosecurity and wound‑management program rather than a standalone solution.
Source: PRnewswire














