What is the New World Screwworm?
A parasitic fly whose larvae feed on living flesh of warm-blooded animals, often entering through an open wound. Untreated infestations can be fatal to livestock.
Is it in the United States?
Yes. It returned to the mainland in June 2026 with confirmed cases in Texas and New Mexico, the first since eradication in 1966. Verify
Can humans get screwworm?
Rarely, but yes — usually through an existing wound. See a healthcare provider if concerned. More on pets & humans →
Can my dog or cat get it?
Yes, any warm-blooded animal with an open wound. Contact your vet if you see signs.
What are the symptoms in cattle?
Wounds that enlarge and drain, a foul smell, visible maggots, and animal distress. Signs in cattle →
What do I do if I suspect a case?
Report it immediately to your state animal health authority. How to report →
How is screwworm eradicated?
The Sterile Insect Technique — releasing sterile flies to collapse the population. How SIT works →
What does Operation Screw the Screwworm do?
We're building drone-based detection and outbreak mapping to find infestations early and make eradication faster. Our approach →
Are donations tax-deductible?
No — we're a for-profit venture; donations fund technology development. Verify
How can I help?
Report cases, contact officials, share the outbreak status, or donate. Take action →