Deadly bat fungus fingered

Written byBob Grant

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The mysterious disease has been linkurl:ravaging bat populations;https://www.the-scientist.com/article/display/55031/ in the northeastern US appears to be caused by a previously undescribed species of a common fungus, according to research published today (Oct. 30) in __Science__. White-nose syndrome (WNS) is a fungal infection that has killed 75% of some bat populations in Massachusetts, Vermont, New York, and Connecticut since it was first discovered in a cave in upstate New York in 2006. Though the specific cause of the mass die-offs remains unknown, the fungus is a likely suspect. "At this point, we have good circumstantial evidence that a particular fungus causes the WNS-associated skin infection," lead author and United States Geological Survey researcher David Blehert said in a __Science__ press release. "We've shown that out of 117 bats examined, 90% of them exhibited characteristic lesions of fungal skin infection." Researchers - among them several state and federal conservation and wildlife department scientists - took fungus samples from more than 100 bats, characterized by pale fungal patches on their noses, ears, and wing membranes, of several species that had succumbed to WNS. They genetically analyzed the fungus and suggest that it is a member of genus __Geomyces__, which typically colonizes the skin of animals living in cold climates. Morphologically, however, the fungus differed from that for any other known species of __Geomyces__. "In the case of this fungal isolate, we are fairly confident that its genetics place it in the genus __Geomyces__," Blehert said, "but its conidia (asexual spores) represent a previously undescribed morphology of the genus." Culturing the fungus in the lab, the researchers found that it grows best at colder temperatures - in the range of those that prevail in caves that bats in the Northeast frequent.

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Meet the Author

Bob Grant
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From 2017 to 2022, Bob Grant was Editor in Chief of The Scientist, where he started in 2007 as a Staff Writer. Before joining the team, he worked as a reporter at Audubon and earned a master’s degree in science journalism from New York University. In his previous life, he pursued a career in science, getting a bachelor’s degree in wildlife biology from Montana State University and a master’s degree in marine biology from the College of Charleston in South Carolina. Bob edited Reading Frames and other sections of the magazine.
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