06/15/2026
Please be aware and arm yourself with knowledge!
Recent cases of New World screwworm (NWS) in southern Texas serve as a reminder for livestock owners to stay informed about emerging animal health concerns and continue routine wound monitoring and care.
While important, the situation is not currently urgent for Minnesota.
State agencies and the University of Minnesota have interdisciplinary teams monitoring the situation carefully. Key information for Minnesota livestock owners and veterinarians includes:
• NWS does not overwinter in Minnesota's climate.
• Spread to Minnesota can occur from animals traveling from affected areas.
• Identifying and treating a NWS infection early is key to limiting fly numbers.
• Notify a state animal health official if you suspect NWS.
• Suspected flies and larvae will be forwarded to the National Veterinary Services Lab within 24 hours for evaluation.
What can livestock owners do?
• Stay aware and informed on the ongoing situation.
• Carefully check your livestock, horses or animals for slow-healing or worsening wounds, signs of discomfort, and maggots in wounds or body openings (e.g., navel or v***a), especially if traveling to/from NWS-affected areas.
• Contact your veterinarian right away if you suspect NWS.
Learn more at z.umn.edu/bdha
