Dangerous rabid beavers attack 2 teens, with 1 airlifted and popular park partially closed

The first beaver attack at Cunningham Falls State Park in Frederick County, Maryland, by the town of Thurmont, involved a 13-year-old swimmer on July 26.

The teenage boy, who had injuries to his hands and chest, was airlifted to Johns Hopkins Hospital, according to WJLA in Washington, D.C.

Swimming access to Hunting Creek Lake at the park was closed soon afterward.

The more recent incident took place on August 5, when a 19-year-old fisherman was bitten in the ankle by a beaver. The young man took himself to Meritus Medical Center in Hagerstown for examination.

"Currently at Cunningham Falls State Park, day-use areas around Hunting Creek Lake will remain closed until wildlife experts and park management determine it is safe to reopen them to the public," Joe Zimmermann, public information officer for the Maryland Department of Natural Resources, told Fox News Digital. 

"Maryland Department of Natural Resources staff, including wildlife specialists and park staff, are working to ensure the safety of the area and confirm that there are no additional beavers present," said Zimmermann. 

He noted that in addition to traps which have been set up since the first incident, wildlife staff are conducting nighttime surveys of the lake area with thermal imaging.

Globally, up to 99% of human rabies cases come from transmission by infected dogs, according to the World Health Organization (WHO).

"In the U.S., canine rabies was largely eliminated by the 1970s - but bats, foxes, raccoons and skunks have been known to transmit rabies," said Gulick.

"The virus can be found in the saliva of infected animals," Labus said. 

Gulick, Falat and Labus all indicated there are clear warning signs. If a beaver shows unusual aggressive behavior by approaching or charging humans or domestic animals, parkgoers are urged to be cautious.

The doctors said beavers typically avoid people. But the virus affects their brains and can cause them to lose fear.

Beavers can become disoriented or uncoordinated. Rabid nocturnal animals can display uncharacteristic daytime exposure. They may exhibit excess salivation, abnormal coordination or abnormal vocalization, the doctors said.

Medical treatment includes receiving a series of rabies vaccines. 

Individuals should not try to catch the animal themselves, but instead should report the sighting to animal control or health authorities, experts said. 

If bitten by a beaver, an individual should go to a hospital immediately for a rabies shot, as rabies can be fatal if left untreated, the doctors said.