06/15/2026
🚨 NEW WORLD SCREWWORM ALERT 🚨
The New World Screwworm (NWS) has recently been detected in the United States, making awareness and prevention more important than ever. This parasite can affect all warm-blooded animals, including horses, cattle, sheep, goats, dogs, cats, wildlife, and even people.
🪰 What is a Screwworm?
The adult fly lays eggs in open wounds, surgical sites, navels of newborn animals, or other moist areas. Once hatched, the larvae (maggots) burrow into living tissue and feed on the animal, causing painful and rapidly worsening wounds.
⚠️ Signs to Watch For:
• Wounds that are not healing
• Foul odor from a wound
• Excessive licking or irritation
• Visible maggots in a wound
• Swelling, pain, or tissue damage
• Depression, weight loss, or decreased appetite
✅ The Good News: Early Detection is Treatable
Treatment typically involves:
• Removal of larvae from the wound
• Thorough wound cleaning and debridement
• Medications to kill remaining larvae
• Antibiotics and pain management when needed
• Ongoing wound care and monitoring by your veterinarian
📋 Idaho Entry Requirements
Due to the threat of New World Screwworm, Idaho has implemented additional import requirements for susceptible warm-blooded animals entering the state from affected areas. Owners transporting livestock, horses, pets, or other animals should verify current requirements before travel. Requirements may include health certificates, inspections, and documentation confirming the animal is free of screwworm infestation.
🐾 How You Can Help Protect Your Animals
• Check animals regularly for wounds.
• Keep wounds clean and protected.
• Seek veterinary attention promptly for wounds that are not healing normally.
• Contact your veterinarian immediately if you notice maggots or suspicious wound infestations.
If you have concerns about your animal or questions about current travel requirements, please contact Knight Veterinary Clinic. Early detection and treatment are key to protecting your animals and preventing the spread of this serious parasite.
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