New World Screwworm
Managing the threat and protecting animal health
The New World screwworm is a fly larva that can burrow into and feed on the flesh of living warm-blooded animals like livestock, wildlife, birds, pets, and even humans. This site serves as a central hub for screwworm information in Arizona, connecting you with trusted guidance developed by University of Arizona experts across Cooperative Extension, the College of Veterinary Medicine, and Arizona Livestock Incident Response Team (ALIRT).
If you have animals, be sure to regularly inspect for wounds, treat wounds promptly, and watch for unusual or non-healing wounds. Report any suspected cases to your veterinarian or to diseasereporting@azda.gov.
Livestock Inspection Guide for New World screwworm
Detailed instructions on how to check your animals for the screwworm and report suspected cases.
Free New World screwworm sampling kits for producers
Free sampling kits are available for producers from your local Extension office. If you suspect a screwworm case during routine inspections, you can collect a sample immediately and contact your veterinarian.
Track reported case locations
The latest information from the USDA and partnering organization on the location and status of confirmed cases.
Resources for veterinarians, pet owners, and shelter workers
Information on what screwworm is, how to inspect animals, and what to do if you suspect an animal has screwworm.
Screwworm outreach and education toolkit
Educational resources for veterinarians, ranchers, pet owners, and animal shelter workers on what screwworm is, how to inspect animals, and how to report possible cases.
Educational Materials
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