Chytridiomycosis is a disease caused by the fungus Batrachochytrium dendrobatidis, which primarily affects amphibians, such as frogs and salamanders. This pathogen infects the skin of these animals, disrupting their ability to absorb water and regulate electrolytes, leading to severe health issues and often death. The spread of chytridiomycosis has contributed to significant declines in amphibian populations worldwide, making it a major concern for biodiversity. Conservation efforts are underway to understand the disease better and protect vulnerable species from its devastating effects.