White-Nose Syndrome, a Devastating Bat Disease, Confirmed in Oregon for First Time

A silent threat to Oregon’s vital bat populations has officially arrived. State wildlife officials have confirmed the first detection of White-Nose Syndrome (WNS), a deadly fungal disease, within Oregon’s borders. The discovery was made in a bat from a cave in Jackson County, marking a somber milestone for conservationists across the Pacific Northwest.

The disease, caused by the cold-loving fungus *Pseudogymnoascus destructans*, disrupts bats during hibernation. It leads to frequent waking, which depletes their fat reserves and often results in starvation or death before spring. Since its emergence in North America, WNS has killed millions of bats, devastating colonies in eastern and midwestern states.

“This detection is something we’ve been preparing for and dreading,” said a state biologist familiar with Oregon’s bat monitoring programs. “Our bats are crucial for a healthy ecosystem, providing natural pest control for our agricultural and forest lands.” A single bat can consume thousands of insects in a single night, a free service worth millions to Oregon’s farmers and timber interests.

While the fungus is not harmful to humans or pets, its spread is primarily bat-to-bat. Humans can inadvertently transport spores on clothing and gear. Officials are urging cavers and anyone entering bat roosts to strictly decontaminate their gear and follow all closure notices. The public is also asked to report any sightings of bats acting strangely or found dead during winter months to the Oregon Department of Fish and Wildlife.

The confirmation triggers enhanced surveillance and response plans. Researchers will now work to determine the extent of the infection and monitor its impact on Oregon’s diverse bat species, several of which are already under consideration for protected status.