ST. PAUL — The Minnesota Board of Animal Health is urging residents to stay vigilant for New World Screwworm (NWS), a pest notorious for causing serious harm to livestock, pets, wildlife, and occasionally, humans. Recent reports indicate that outbreaks are occurring in Central America, with the threat of this invasive species looming not far from Minnesota’s borders.
The U.S. Department of Agriculture (USDA) is collaborating to strengthen protective measures against this pest. Although Minnesota’s climate presents a lower risk for NWS compared to southern states, the potential for its introduction remains due to international animal movements. This emphasizes the importance of vigilance among both public and agricultural communities as invasive pests can travel quickly and unexpectedly across state lines.
According to State Veterinarian Dr. Brian Hoefs, many individuals mistakenly believe that Minnesota’s colder climate can deter tropical pests like the NWS. “Unfortunately, our summers and shoulder seasons are warm enough to allow this fly to complete its lifecycle and potentially spread in Minnesota,” he noted. The historical trajectory of NWS is concerning; it was once endemic in the U.S. but was largely eradicated by the 1980s due to aggressive programs. However, with new threats surfacing, the importance of community awareness cannot be overstated.
Livestock owners, travelers, pet owners, and anyone engaged with animals have a role to play in preventing the spread of this pest. Recognizing the symptoms of NWS infestation is crucial. Common signs to watch out for include:
- Open wounds that may contain maggots
- Strong, unpleasant odors
- Irritated or distressed animal behavior
- Tissue decay that worsens over time
Animals that are infested often isolate themselves from the herd, show visible discomfort, and may have decreased appetite. Immediate reporting to a veterinarian is essential if any of these signs are observed.
Preventative measures can greatly minimize the risk of NWS entering Minnesota. People traveling with pets are strongly encouraged to adhere to all import requirements, which are specifically designed to screen for diseases and pests like NWS. A proactive approach includes inspecting pets for any signs of illness before and after travel.
Consulting with a regular veterinarian after returning home is important to address any concerns about potential health issues related to travel. Moreover, travelers should remain informed about the status of NWS and similar pests in their destination countries, and it may be wise to reconsider traveling with pets to areas identified as high-risk for this parasite.
For those seeking additional information about NWS, resources from the USDA are available to track national progress in monitoring and managing this dangerous pest. Staying informed and engaged is key to preventing the spread of NWS and protecting the health of animals in Minnesota and beyond.
