Amphibian populations worldwide have been in decline for many decades now. The spread of the chytrid fungus, Batrachochytrium dendrobatidis, appears to be a major proportion of the decline (Bd). Chytrid sporangia occurs inside infected animals' epidermal cells, animals that subsequently exhibit regions of sloughed skin. They may also belethargic, expressed by the inability to escape and the inability to run. Usually, the infection takes four to five days, at the end of which zoospores are released into the atmosphere from sporangia. Mortality rates of some amphibian populations exceed 100 percent; other species appear to be able to survive the infection.
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