The USDA confirmed a New World screwworm case in a dog in Lea County, New Mexico, on June 8. While that news deserves attention, the agency says the risk remains low for most pets. Dog owners do not need to panic, but they should know how to recognize a suspicious wound and when to contact a veterinarian.
What is New World Screwworm?
New World screwworm is caused by fly larvae that infest the living tissue of warm-blooded animals. Dogs with open cuts, surgical sites, insect bites, or other broken skin may be vulnerable where the parasite is present.
Warning Signs to Watch For
Pay attention to a wound that grows instead of healing, develops an unusual odor or discharge, or appears to contain moving larvae. An affected dog may repeatedly lick the area, seem painful or restless, lose energy, or stop eating. These signs can have many causes, but all warrant prompt veterinary attention.
Travel and Outdoor Precautions
Check your dog after outdoor activity, especially around the ears, paws, skin folds, and existing wounds. Keep cuts clean and follow veterinary wound-care instructions. After travel near a reported area, inspect your pet daily and follow current USDA and state guidance.
What to Do If You Are Concerned
Do not attempt to diagnose, remove, or treat a suspected infestation yourself. Contact a veterinarian promptly and share recent travel, outdoor exposure, and when the wound first appeared.
The FDA Treatment Update
The FDA has authorized generic nitenpyram for treating New World screwworm infestations in dogs and cats under an emergency-use authorization. This does not mean owners should self-dose a pet. A veterinarian should direct product choice and dosing and determine whether the wound needs cleaning, pain control, antibiotics, or other treatment.
For most U.S. pets, the current risk remains low. Practical wound care, post-travel checks, and quick veterinary attention for a worsening wound are the most useful precautions. This article is educational and is not a substitute for veterinary diagnosis or treatment.
