Solution for Screwworm Outbreak

Northfield, MN (20 May 2025) – A resurgence of the deadly New World screwworm outbreak (Cochliomyia hominivorax) has prompted the U.S. Department of Agriculture (USDA) to suspend all imports of live cattle, horses, and bison from Mexico. The parasite, whose larvae feed on the living tissue of warm-blooded animals, has been detected in southern Mexico, raising alarms about its potential spread into the United States. (Axios, NPR)

The New World screwworm, once eradicated from the U.S. in the 1960s, poses a significant threat to livestock and wildlife. Infestations can be fatal to a full-grown cow within one to two weeks if left untreated. The USDA has emphasized the severity of the threat, noting that a similar outbreak in 1976 affected over 1.4 million cattle in Texas alone. (New York Post, NPR)

In this critical time, Doramectin has proven to be a vital tool in combating screwworm infestations as it effectively disrupts the parasite’s life cycle by targeting larvae at multiple developmental stages.

“Doramectin targets parasitic larvae at multiple stages, killing them before they can continue their development or reproduce,” said Dr. Pete Hann, Technical Services Veterinarian and Parasitologist at Aurora Pharmaceutical. “Doramectin breaks the cycle and gives producers the upper hand in protecting their herds.”

Producers in affected areas are urged to monitor cattle closely for signs of screwworm and to consult with their veterinarians about incorporating Doramectin into their parasite control protocols.

About Aurora Pharmaceutical:
Aurora Pharmaceutical is a Minnesota-based leader in veterinary pharmaceuticals, committed to supporting producers with scientifically backed products and expert guidance. Our innovations are built on decades of research and field experience to deliver reliable protection and improve herd health all year-round.

Click here for more information:https://aurorapharmaceutical.com/

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