Fungus Confirmed in Oregon
The deadly fungus that causes white-nose syndrome in bats has been detected in Oregon for the first time, state wildlife officials announced recently. The fungus, Pseudogymnoascus destructans, was identified in guano samples collected from a bat roost at Lewis and Clark National Historical Park in Clatsop County. This marks a significant development as it’s the first documented presence of the fungus in the state, although the fungus itself was previously detected in bat droppings in the same location in 2025. This detection follows earlier findings of the fungus in Washington state in 2016 and its spread across numerous other states since its initial discovery in New York in 2007. The disease has already led to the deaths of millions of bats across North America and has been linked to the endangered status of at least one bat species.
Understanding White-Nose Syndrome
White-nose syndrome is a devastating disease that primarily affects hibernating bats. The fungus disrupts their hibernation cycle, causing them to wake up more frequently. This increased activity leads to the depletion of critical fat reserves, essential for surviving the winter months. Dehydration and starvation are common consequences, often resulting in death. The fungus also manifests as a visible white, fuzzy growth on the bats’ muzzle, ears, and wings, causing irritation and damage to their skin. While the disease is lethal to bats, it poses no threat to humans or domestic animals. However, it is crucial for humans to take precautions as the fungus can be spread through contaminated clothing, gear, and equipment after visiting bat habitats like caves or mines.
Spread and Prevention
The primary mode of transmission for white-nose syndrome is through direct bat-to-bat contact during hibernation. However, human activities can inadvertently contribute to its spread. Individuals who explore caves or other bat roosting sites are advised to thoroughly clean and decontaminate their gear, including shoes and equipment, before leaving the area. This helps prevent the transport of fungal spores to new locations. Reporting any unusual sightings of sick or dead bats to the Oregon Department of Fish and Wildlife (ODFW) is also crucial for monitoring and response efforts. The ODFW provides online resources and a dedicated phone number for reporting such incidents.
Impact on Bat Populations
Since its emergence in North America, white-nose syndrome has had a catastrophic impact on bat populations, leading to significant declines in many species. At least 40 states have reported cases of the disease, with several others detecting the fungus without confirmed disease presence. The long-term ecological consequences of these population declines are a growing concern, as bats play a vital role in insect control and pollination. While Oregon was previously one of the few states to have avoided the presence of both the fungus and the disease, this detection signifies a new challenge in conservation efforts for these essential nocturnal mammals. Federal and state agencies are collaborating to monitor the situation, research potential treatments, and develop strategies to mitigate the impact of white-nose syndrome on bat populations.
