How to Protect Your Livestock from New World Screwworm
The USDA Natural Resources Conservation Service (NRCS) and Animal and Plant Health Inspection Service (APHIS) are urging producers and livestock owners to take proactive measures against the New World Screwworm (NWS). Because screwworm larvae target open wounds on warm-blooded animals, early detection and biosecurity are critical to preventing an outbreak.
Key Action Steps for Producers
- Perform Daily Inspections
- Conduct thorough, head-to-tail checks on all animals.
- Pay special attention to high-risk areas: newborn navels, ears (around tags), nostrils, eyes, and any minor cuts or scratches.
- Watch for signs of infestation: irritated behavior, persistent head shaking, swollen or draining wounds, and a noticeable smell of decay.
- Practice Active Wound Management
- Promptly clean and treat all open cuts, tick bites, and surgical sites with approved protectants or insecticides.
- Postpone non-essential wounding procedures (like dehorning, branding, or ear-notching) if possible.
- Inspect housing and handling facilities to remove sharp edges, broken wire, or objects that could injure animals.
- Control Fly and Parasite Populations
- Maintain a robust herd fly control strategy to keep overall insect pressure low.
- Treat animals for ticks and other parasites that create small skin punctures where screwworms can lay eggs.
- Report Suspected Cases Immediately
- If you spot larvae or suspect an animal is infested, quarantine the animal right away to prevent flies from spreading.
- Contact your local veterinarian, State Animal Health Official, or USDA office immediately. Early reporting helps trigger rapid containment efforts like sterile fly releases.
For more information, please visit this link: