Chytridiomycosis, caused by the fungus Batrachochytrium dendrobatidis, is considered the most destructive infectious disease of vertebrates in recorded history. UK amphibians face ongoing threats.
Chytridiomycosis causes progressive skin disease that disrupts osmoregulation, eventually leading to heart failure. Affected amphibians suffer a prolonged and unpleasant death. The scale of species extinctions driven by chytrid disease represents a catastrophic welfare and biodiversity crisis. UK citizen scientists and conservationists have important roles in preventing Bsal introduction through vigilant biosecurity.