Screwworm Outbreak Sparks Emergency in Florida Keys—5 Crucial Facts You Need to Know
- The invasive New World screwworm (Cochliomyia hominivorax) has been detected in the Florida Keys, triggering a state of emergency as the flesh-eating larvae can infest living tissue, including pets, livestock, and humans, causing severe wounds and potentially fatal infections if untreated.
- Transmission is rapid and gruesome—female flies lay eggs in open cuts, mucous membranes, or even healthy skin, with larvae hatching in 12-24 hours. This can lead to cavities, swelling, and a putrid smell within days, requiring immediate veterinary or medical intervention.
- The outbreak likely originated from stray animal imports, as the parasite has not been endemic in the U.S. since the 1960s. Authorities believe a single infected dog or pet shipment from South America may have spread the pest, emphasizing biosecurity gaps.
- Treatment is challenging but doable—manual removal of larvae followed by broad-spectrum antibiotics is critical, but many cases are misdiagnosed as simple wounds, delaying care. The USDA has released sterile male screwworms to disrupt breeding, but mass sterilization efforts need weeks to curb the population.
- To protect yourself, inspect pets and livestock daily for lesions, and avoid traveling with animals from affected areas. Report any suspicious maggot infestations immediately to state agriculture departments or the USDA—failure to do so risks a swift, silent spread to mainland Florida.