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Friday, September 7, 2012

What’s Going on With Yosemite and Hantavirus?

Yosemite is synonymous with stunning natural settings and a chance to get away from it all. But in the past few weeks, Yosemite has attracted unwanted attention after a Hantavirus outbreak in the park. 


Yosemite's Curry Village, where several people who were infected with hantavirus stayed.
Yosemite's Curry Village, where several people who were infected with hantavirus stayed.
So far, eight Yosemite visitors are confirmed to have contracted the virus, with three dead of Hantavirus pulmonary syndrome—a variation of Hantavirus that’s not communicable between humans, but which can be transmitted to humans through contact with excrement, saliva, or urine from infected mice. The National Park Service, along with the Centers for Disease Control and Prevention (CDC), are aggressively trying to contact people who recently visited Yosemite and could be at risk. 

Authorities initially focussed on 91 tent cabins in a specific area of the park, which had approximately 10,000 visitors between June and August and is where most of the people who are known to have contracted the virus stayed. But after a man who visited a different area of the park at a higher elevation tested positive for the virus this week, the investigation was widened and another 12,000 people were added to the list of those at risk, upping the total to 22,000. 

Brian Amman is an ecologist with the CDC who studies virus outbreaks and has been working the phone hotlines talking to people who might have been exposed to the virus. Although only a tiny fraction of those people are likely to be infected, panic is inevitable. "You feel bad for a lot of them, because they’re scared, and rightfully so," Amman says. 

The Syndrome


The most common form of the hantavirus found in the U.S. is the Sin nombre virus, carried in deer mice, a small mouse with a range that stretches across much of the United States. Although the syndrome associated with the hantavirus is exceedingly rare in the U.S. (only about 600 cases have been documented here), it has a fatality rate of close to 40 percent. 

Once a person becomes infected through contact with the urine, saliva, or feces of an in... http://www.popularmechanics.com/science/health/med-tech/whats-going-on-with-yosemite-and-hantavirus-12479810?click=pm_latest