For Farmers, Ranchers and Industry
NWS was first detected in the United States on June 3, 2026 and is currently spreading in Texas. There is a case in New Mexico that was apparently isolated. While it is currently not known from Florida or any neighboring states, it is critical that our producers and industry stakeholders stay vigilant to guard against this emerging threat. Three key things you should know are (1) current animal importation restrictions into Florida, (2) signs of a NWS infestation, and (3) how to report an infestation.
Animal Importation Restrictions
FDACS has implemented an emergency rule that places importation restrictions on livestock and other warm-blooded animals into Florida from designated infested zones and other high-risk areas. The types of restrictions and which areas are impacted changes regularly as the NWS threat evolves. The latest rules and restrictions can be found here: https://www.fdacs.gov/NWS
Signs of New World screwworm infestation:
Screwworms are typically found on warm-blooded animals that have a draining or enlarging wound. Almost any type of wound can become infested with screwworm larvae, including those caused by feeding ticks, castration, dehorning, branding, shearing, barbed wire fences, and even shedding of antler velvet in deer. The navels of newborn mammals can also become infested. It is critical that we remain vigilant for signs of infestation.
Signs of screwworm infestation in animals include:
- Wounds in living animals infested with maggots
- Blood-tinged discharge from the infested wounds
- Foul odor
- Discomfort
- Depressed/no eating
- Decreased milk production
- Seclusion from rest of herd or flock
How to report:
Anyone who suspects the presence of screwworms should report it immediately to FDACS:
- By phone during office hours: (850) 410-0900
- By phone after hours: 1-800-342-5869
- Via email: RAD@FDACS.gov
- Report online at: www.FDACS.gov/RAD
Early reporting is essential to stop the spread of NWS and to ensure that infested areas are prioritized to receive sterile flies for eradication.