Screwworm outbreak reported in Florida cattle with officials urging immediate biosecurity measures.
Top 5 things you need to know about this screwworm threat:
- The screwworm is a parasitic fly larva that infests living tissue in warm-blooded animals, including livestock, pets, and even humans. It causes severe wounds, infections, and can be fatal if left untreated.
- This outbreak marks a rare occurrence in the U.S., with the last major eradication effort succeeding decades ago. The current case involves a cattle farm in South Florida, prompting a swift state and federal response.
- Officials stress early detection is critical: Look for maggots in wounds, foul odors, and restlessness in animals. The screwworm larvae have distinct dark lines and a blunt rear end, unlike common fly larvae.
- The primary risk vector is imported animals or contaminated materials from screwworm-endemic regions like South America and the Caribbean. Anyone transporting livestock across state lines must obtain health certificates and inspect for signs.
- To prevent spread, affected areas may be quarantined, and farmers are urged to treat all animal wounds with approved insecticides and maintain strict hygiene. Pet owners should also watch for fly strikes on outdoor pets.