The Tennessee Department of Agriculture is taking proactive steps to protect the state’s livestock industry after the U.S. Department of Agriculture confirmed a case of New World screwworm (NWS) in Zavala County, Texas.
While no cases have been detected in Tennessee, state officials say they are increasing preparedness efforts to prevent the invasive parasite from becoming established in the Volunteer State.
“NWS has not been detected in Tennessee, but we want to be proactively working to prevent the establishment of this pest in Tennessee,” said State Veterinarian Dr. Samantha Beaty. “Livestock, pets and even wildlife are vulnerable. This parasite can have a tremendous negative impact on our animal populations and associated industries.”
New World screwworm is a parasitic fly whose larvae infest living tissue in warm-blooded animals. Unlike common maggots that feed on dead tissue, screwworm larvae attack healthy flesh, creating serious health concerns for livestock, pets, wildlife, and, in rare cases, humans.
In response to the Texas detection, Tennessee’s State Veterinarian has issued a temporary order requiring stricter movement regulations for warm-blooded animals entering Tennessee from infested areas. Animals moving into the state from affected regions must undergo additional inspections and preventative treatments before transport.
The Department of Agriculture is also increasing surveillance efforts and educating producers, veterinarians, and animal owners about prevention and early detection.
Officials are encouraging livestock owners to routinely inspect animals for unusual wounds, especially around injuries, tick bites, dehorning sites, ear tags, and natural body openings where infestations may occur.
Tennessee animal health officials have also prepared testing materials and response plans should a suspected case arise.
The New World screwworm was successfully eradicated from the United States in the 1960s, from Mexico in the 1970s, and from Central America in the early 2000s. However, recent detections near the southern border have renewed concerns among agricultural leaders nationwide.
Anyone who suspects a case of New World screwworm should immediately contact the Tennessee State Veterinarian’s Office at 615-837-5120.
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