Screwworm Poses New Threat to Amphibians, Scientists Warn of Ecological Shift
HAVANA, CUBA – A recent scientific investigation has identified a significant and unexpected biological shift: The New World screwworm, a parasitic fly species historically known for infesting warm-blooded animals, is now posing a direct and escalating threat to amphibian populations. According to a report published Monday by the Center for Biological Diversity, researchers in Cuba confirmed the first documented cases of screwworm infestations in a native frog species, marking a dramatic expansion of the parasite’s host range. “This discovery fundamentally alters our understanding of screwworm ecology. Historically, we have not observed this pathogen targeting cold-blooded vertebrates in the wild,” stated Dr. Elena Vargas of the University of Havana’s Institute of Ecology, lead author of the study. The findings indicate that climate change and habitat degradation may be forcing the larvae-causing fly to adapt to new hosts. The screwworm, which lays eggs in open wounds, has long been a scourge for livestock and wildlife in tropical regions, but its leap to amphibians raises urgent concerns for global biodiversity. “Amphibians are already the most endangered class of vertebrates,” Dr. Vargas added. “This new pressure from screwworm infestations could trigger a cascade of local extinctions unless immediate containment protocols are implemented.” The study was backed by surveillance data from the U.S. Department of Agriculture, which has monitored screwworm eradication efforts for decades. Environmental agencies are now calling for an emergency review of biosecurity measures to prevent the pest from spreading further into vulnerable ecosystems.