From backyard adventures to trips across Arizona, our pets can encounter all kinds of insects and parasites.
One that deserves special attention is New World screwworm, a fly that lays eggs in wounds or body openings. Its larvae feed on living tissue and can cause serious injuries.
How Can You Tell Something Is Wrong?
A wound that keeps getting worse instead of healing is an important warning sign. Other symptoms include visible larvae, swelling, a strong odor, bloody discharge, or signs of pain.
Your pet may also lick repeatedly, shake their head, become unusually irritable, seem tired, or lose interest in food.
Suspected screwworm infestations should be evaluated immediately by a veterinarian. Do not attempt to remove larvae yourself. Animal health authorities must also be notified when required.
Staying Prepared
Keeping dogs and cats on year-round flea and tick prevention is recommended. Some commonly prescribed parasite medications have received FDA authorization for screwworm treatment, although not all products prevent infestations.
If you're traveling with your pet, remember that certain states have additional entry requirements for animals from affected regions. You may need a recent veterinary examination, health certificate, electronic documentation, or entry permit.
California has specific rules for animals arriving from designated affected areas. Check CDFA's current guidance before traveling.
Coolidge Veterinary Hospital is here to help local pet owners recognize concerning symptoms and understand their pets' preventive care needs.
Stay Educated About Emerging Parasites
New World screwworm developments may affect both pet care and interstate travel. Visit the USDA for current activity reports, review FDA information about screwworm medications, and consult California's entry guidelines before traveling with your dog or cat.