New World Screwworm

New World Screwworm (NWS) Resources

The New World Screwworm (NWS) situation is continuously evolving. As federal and state animal health authorities respond to detections and release new guidance, KVMA is committed to keeping Kentucky's veterinary community informed.

Because conditions and recommendations can change rapidly, the resources below will be updated as new information becomes available. We encourage you to check back regularly to ensure you're working from the most current guidance.

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June 3, 2026 Update from the Office of the KY State Veterinarian

The U.S. Department of Agriculture’s (USDA) Animal and Plant Health Inspection Service (APHIS) confirmed the detection of a New World screwworm (NWS) in a bovine in Zavala County, Texas.

Disease Prevention

Information provided by the Office of the KY State Veterinarian

FDA Issues Emergency Use Authorization for NWS Treatment

The U.S. Food and Drug Administration today issued an Emergency Use Authorization (EUA) for generic Nitenpyram Tablets (nitenpyram) for the treatment of New World screwworm (NWS) infestations (myiasis) in dogs and cats,