The Swine Health Information Center in collaboration with the American Association of Swine Veterinarians will host a webinar titled Emerging Risk of New World Screwworm and Efforts to Prevent Re-introduction into the US. The webinar will be held on Friday, June 13, 2025, from 10:00 am to 11:30 am CDT.
In November 2024, USDA’s Animal and Plant Health Inspection Service was notified by Mexican officials of a positive detection of New World screwworm in Mexico. NWS is a parasitic fly whose larvae feed on the living tissue of warm-blooded animals, causing serious wounds, infection, and even animal death. First discovered in a cow in the southern Mexico state of Chiapas, NWS has moved north to Oaxaca and Veracruz, within 700 miles of the US/Mexico border. As of May 11, 2025, US Secretary of Agriculture Brooke Rollins issued a suspension of live cattle, horse, and bison imports through US ports of entry along the southern border due to the continued and rapid northward spread of NWS in Mexico.
The intent of the webinar is to provide the latest information on NWS, including an overview of the parasite, the fly lifecycle, clinical signs of infestation, the status of NWS in Mexico, and efforts to mitigate incursion into the US. Join experts during this webinar as they share information on NWS and how it could impact the US pork industry.
Confirmed presenters include:
Cody Egnor, DVM, Veterinary Medical Officer, United States Department of Agriculture – Overview of NWS, status of detection in Mexico and current USDA response and mitigation efforts
Kathy Simmons, DVM, Chief Veterinarian, National Cattlemen’s Beef Association – A cattle producer perspective of the emerging risk and impact for incursion of NWS into the US
Trey James, DVM and/or Nancy Adams, DVM, Texas Animal Health Commission Epidemiology Department – State animal health official response efforts for outreach, prevention and preparedness against NWS
Moisés Vargas-Terán, DVM, International Animal Health Expert consultant for OMSA, FAO, IAEA, WHO, and the IDB – Technical Overview of NWS Control: Veterinary and Producer Perspectives in Mexico
The Swine Health Information Center, launched in 2015 with Pork Checkoff funding, protects and enhances the health of the US swine herd by minimizing the impact of emerging disease threats through preparedness, coordinated communications, global disease monitoring, analysis of swine health data, and targeted research investments. As a conduit of information and research, SHIC encourages sharing of its publications and research. Forward, reprint, and quote SHIC material freely. For more information, visit http://www.swinehealth.org or contact Dr. Megan Niederwerder at [email protected] or Dr. Lisa Becton at [email protected].
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