percentage of mice that carry hantavirus

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  • Feb 21, 2020

How Nervous Should I Be About Hantavirus? – Mother Jones
How Nervous Should I Be About Hantavirus? – Mother Jones

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Update (09/07/12): Other people have been confirmed died of hantavirus after spending time in Yosemite, bringing the death toll to three and infection count to eight. And the shift pattern for the plague, a man who had just stayed in the High Sierra Camps in Yosemite tested positive for the virus, so that officials expanded the scope of the potential outbreak to enter areas outside Curry Village tent cabins and now believe that the 22,000 visitors to the park may have been exposed during the summer.

Every time I lived in a hut inland Northern California Sierra mountains, I am against the paranoia back driven by posted signs describe Hantavirus fun, the spread of a rare but deadly sickness by rats nesting in the cabin and a solid source of human about the possibility of food and shelter. This year, I was even more established paranoia: Two people were killed and viruses on what is being described as this summer in Yosemite. Park officials have traced the case back to the awful compound called Curry Village tent where they were suffered to stay at some point during the summer, and has warned 3,000 visitors via email from potential exposure to the virus.

US clothing wilderness and public health officials have been warning about hantavirus over the years, since the outbreak was “a type of hantavirus, newly identified in the Four Corners region of the country in 1993. Since then, 602 cases of the disease pulminary hantavirus, a fatal disease with virus asssociated ,. So why all the fuss about six cases were confirmed in the Park?

There are several strains of hantavirus in the world, and some of them cause hantavirus pulmonary syndrome (HPS), flu-like respiratory disease that results death almost. Sin Nombre virus that makes headlines in the nineties carried by deer mice (Peromyscus maniculatus), the Center for Disease Control and Prevention “deceiving cute animals, with large eyes and ears.” They live quite a lot, especially in forests or deserts but sometimes in urban areas. “There were deer mice are found in even Washington, DC and New York City,” Yosemite National Park spokeswoman Kari Cobb told me. Contact with deer mice urine fresh, droppings, or saliva causes the virus to spread to humans, mostly through inhalation of dust particles which have been mixed with animal manure. It tends to occur in rural buildings such as barns, cabins, and warehouses where deer mice nests and droppings as possible.

There is no cure and no specific treatment for the disease virus, health officials so that people only warn people to avoid mice and in which these animals nest. And although 15-20 percent of deer mice infected with hantavirus, Cobb explained, it is a rare disease for humans to contract, largely because the virus dies shortly after contact with sunlight, and can not be spread from one person to another. HPS is more prevalent in the Southwest, but more than half of all cases occur in other places, especially in rural areas.

The fact that three to four people down with HPS after staying in one particular location make the Yosemite outbreak is somewhat unusual. “Usually it’s random and occur in different places and do not affect some people in the same place,” said Cobb. Sudden uptick in visitors to the park have a pretty frantic. After Yosemite hantavirus hotline set up last Tuesday, 700 people called to inquire about the possibility of exposure and symptoms within 24 hours ,. Meanwhile, the park has launched an investigation into the population of deer mice and the percentage of mice that carry the virus to try and find out why so many people may have contracted the disease.

I wonder whether climate change could expand the population of deer mice and because the incidence of hantavirus. “It usually wet years that affect rats and make the population increases,” said Cobb. Thisit’s actually quite dry year in Yosemite, with only 50 percent of normal snowpack. But, Cobb added, “Last year we experienced a 200 percent increase in the snowpack.” Potentially, wet, 2011 may have led to deer mice colonies to grow. This scenario would reflect the events described in the University of Utah, which states that the increase in El Niño rainfall of two to three years before it was to blame for the deer population is denser in the southwest around the time of 1993 Sin Nombre outbreak.

, an epidemiologist at the University of California-Davis who examines how changes in biodiversity and climate impact of infectious diseases, said that deer mice are mammals very common no matter the weather. But he questions what might make the mouse became more of a threat: “Is it necessary for more access to sources of food?” This year’s drought has caused the bears as they search for food; may be rats were also more likely to seek shelter vittles in humans, Foley argues. “Everything that affects the ecology of deer mouse can affect hantavirus,” he said.

There are some indications that climate change may affect the incidence of the virus. A finding that the temperature is higher in Western and Central Europe have been associated with hantavirus outbreaks more often as the rat population increases (although mice carrying Puumala hantavirus, not Sin Nombre). Utah study mentioned above reason that El Niño and climate change “increases the prevalence of hantavirus when the host population dynamics are driven by the availability of food.” But the paper also attributes the increase in hantavirus to human disturbance to the ground in areas such as livestock (or tourist tent cabins) where human traffic increase deer access to food. Climate change affects the pattern of hantavirus, the Utah researchers claim, although changes vary depending on location, species of rodent, and changes in the landscape, and it’s still a little early to predict what will happen with hantavirus over the coming decades as a tool to diagnose the disease only there for 15 years or more. Researcher Denise Dearing, who co-authored the study Utah, informing me that after eleven years of data collection, unfortunately hantavirus funding for the study was cut last year; as he sees it, the virus will be unpredictable “unless we have a huge oversight set up” to continue studying the disease.

hantavirus warning my poster will face the next time I am in the Sierra outback shack will likely continue to give me the creeps heebie. And speaking of warning signs, Yosemite ever posted anything in his tent cabin; for allegedly ignoring a warning lesson from California public health scientists to educate visitors about the disease, California Watch investigation found. Indeed, Cobb told me there are no signs hanging in Curry Village before the outbreak. “It’s just so rare, there are no known cases in Yosemite Valley before this,” he said, although there are only two known cases related to the Tuolumne Meadows nearby. Now the park has been closed indefinitely Curry Village area, and plans to become pretty agro about passed out pamphlets and training employees about safe ways to cabin clean and avoid contamination; Also it should be, if you consider Slovakia Boris Klempa investigators in 2009 that “hantaviruses will undoubtedly remain a significant public health threat for decades to come.”

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How Nervous Should I Be About Hantavirus? – Mother Jones
How Nervous Should I Be About Hantavirus? – Mother Jones

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