The U.S. Food and Drug Administration (FDA) has issued an Emergency Use Authorization (EUA) for CLiK Extra, a wound spray formulated to prevent New World screwworm (NWS) infestations. This authorization permits the use of the spray on livestock such as sheep, cattle, goats, and swine, as well as certain wildlife including deer, elk, and bison.
# Mechanism of Action
CLiK Extra operates as an insect growth regulator (IGR), which interrupts the development of NWS larvae. Unlike insecticides that kill larvae, IGRs prevent them from maturing, thereby blocking the lifecycle and potential tissue damage to the host.
# Application Guidelines
The spray is authorized for topical use around wounds resulting from birth, surgery, or husbandry procedures like dehorning and tagging. It is crucial that the spray be applied during the early stages of wound appearance. If an infestation develops despite usage, consulting a veterinarian is recommended for treatment options.
# Regulatory Impact
The EUA reflects the potential threat NWS poses to animal health. According to Timothy Schell, Ph.D., Director of the FDA’s Center for Veterinary Medicine, extending this authorization to wildlife aims to protect these populations and limit the pest’s spread.
# Limitations
It's important to note that CLiK Extra is not FDA-approved for any other uses beyond this EUA. Furthermore, the product’s usage is contingent upon the continued recognition of NWS as a public health threat.
# Additional Information
For more detailed usage guidelines, the FDA provides a Fact Sheet under the EUA for CLiK Extra. Stakeholders are advised to refer to this material for comprehensive safety and application instructions.
This development was initiated in response to the emerging risk posed by the New World screwworm and is part of ongoing efforts to safeguard both domestic and wildlife populations from this pest.
Information Source: FDA Press Announcements