An outbreak of New World Screwworm in the United States began in 2026. The outbreak threatens the cattle industry in Texas.
Cases As of July 3, 2026, there are 32 known NWS cases in the US.
Domestic response The USDA has released sterile screwworm flies in Texas, a technique that has eradicated screwworm from the United States previously. In June, Texas governor Greg Abbott pledged to assist the USDA to accelerate the construction of a sterile screwworm fly factory in Texas.
International response On June 5, 2026, Canada instituted a ban on imported cattle that were in Texas within the past 21 days. In June 2026, Mexico halted most livestock imports from the United States.
References
External links Official website