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10 Jul 2014: A Possible Advance in Fight
To Combat a Deadly Amphibian Fungus

Scientists have discovered that a certain kind of toad can acquire immunity to the deadly chytrid fungus, which has caused widespread mortality among amphibians worldwide. Reporting in Nature, the scientists say they have conferred immunity in oak toads to the chytrid fungus after repeatedly exposing them to the organism that causes the disease. The lead author of the study, Jason Rohr of the University of South Florida, said the discovery means it might be possible to confer immunity on entire communities of amphibians in the wild by lacing local water sources with dead versions of the fungus that could be absorbed by the amphibians. But Rohr said many questions remain, including how long immunity lasts, whether tadpoles can acquire immunity, what concentration of released antigen would confer immunity, and whether such releases would harm other organisms. The chytrid fungus, Batrachochytrium dendrobatidis, attacks the skin of amphibians, thickening it and preventing the animals from absorbing water and vital salts.


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