An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Animal and Plant Health Inspection Service
Pet Travel
Traveling With Food or Agricultural Products
Imports
Exports
Trade Management
Animal Health
Animal Welfare
Wildlife
Plant Health
Biotechnology
Funding Opportunities
Our Agency
Program Areas
News and Media
Policies and Regulations
Stay up to date on the current status of New World screwworm (NWS) in the United States, Mexico, and Central America, including latest news and detection updates.
Stay up to date on the current status of New World screwworm (NWS) in the United States, Mexico, and Central America, including latest news and detection updates.
This dashboard provides a current snapshot of confirmed New World screwworm animal and wild fly detections in the United States.
Tools and resources to prepare for and respond to an outbreak of NWS.
Search an address to see if you are in a New World screwworm zone.
IMPORT: For a complete list of regions USDA recognizes as affected by screwworm and any temporary trade restrictions, visit Animal Health Status of Regions. Detailed information about import requirements for all animal species regulated by USDA is available at Live Animal Imports.
EXPORT: For detailed information about restrictions on exports of live animals, go to Live Animal Exports.
Currently, all southern ports of entry are closed to livestock trade.
USDA proposes a phased reopening of Southern ports to livestock trade, contingent upon satisfactory progress on priority Action Plan milestones.
USDA Continues to Lead Aggressive National NWS Response
If you see any suspicious wounds, maggots, or infestations in animals or people, report it immediately.
Map will be updated on Tuesdays and Thursdays at 5 p.m. ET. List of cases within 100 miles will be updated each business day at 5 p.m. ET.
The sterile insect release area, or polygon, is adjusted as needed to maintain broad suppression and help prevent the pest from spreading to new areas.
**Our highest priority remains protecting the United States, and USDA adjusts the sterile insect dispersal area based on science and modeling to provide the most protection.
* Mexico’s National Service of Health, Food Safety, and Quality (SENASICA) defines a case as active at the time of diagnosis. After 15 days, the case is revisited and becomes inactive if personnel verify absence of new wounds or larvae.
Additional information on the current situation in Mexico is available via the SENASICA website.
Visit SENASICA
Updated information on the current situation in Central America is available via the Panama-United States Commission for the Eradication and Prevention of Screwworm (COPEG) website.
Visit COPEG
An official website of the U.S. Department of Agriculture
Stay updated on the latest news and stories from APHIS and all of our different focus areas.
Contact us for support, or tell us how we’re doing.
Looking for U.S. government information and services? Visit USA.gov