A deadly fungus is killing millions of bats in the U.S. Now it's in California

JULY 5, 2019

by Louis Sahagun, Los Angeles Times

A mysterious fungus that has killed millions of bats in the eastern United States and left caves littered with their tiny carcasses has arrived in Northern California and appears poised to spread throughout the state, according to officials.

Government biologists confirmed Friday that a number of bats found near Lassen Volcanic National Park had tested positive for the germ that causes white-nose syndrome—a relatively new disease that leaves a trademark smudge of white on the infected animal's muzzle.

The illness, which is caused by a cold-loving fungus, appeared suddenly in the Northeast just over a decade ago and has moved steadily west. The fungus has devastated North American bat species in some regions and pushed the natural pest controllers toward extinction.

According to California biologists, the fungus was detected in four bats found roosting within houses and a bank building in the town of Chester, about 15 miles southeast of the park. The first case was detected a year ago, and the others much more recently, officials said.

"We all thought we were going to have more time before it got this far west," said Winifred Frick, a UC Santa Cruz biologist and chief scientist with Bat Conservation International. "We should all be very concerned about this heartbreaking discovery."

Since it was first discovered in New York 12 years ago, the fungus has swept across 38 states, and killed legions of bats. A majority of the dead were little brown bats—one of the most common mammals in North America—but scientists say that most of the 45 species of bats in the U.S. and Canada may be susceptible to the disease. (The fungus is not known to cause illness in humans, according to officials.)

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