World Bulletin / News Desk
Public health officials have begun examining blood samples and questionnaire results from dozens of Yosemite National Park workers who volunteered for a study designed to shed light on an unprecedented outbreak of deadly hantavirus.
This week's screening, which involved 96 workers, is the latest effort by officials to uncover clues about the rare, mouse-borne lung disease that has infected at least nine park visitors and killed three since June.
"This is a unique opportunity to learn more about potential exposure to hantavirus from the people who lived and worked in close proximity to this cluster of cases," park spokesman John Quinley said Thursday.
One aim is to help researchers design a study of the California park's more than 2,500 workers in a search for clues about how the virus infects people and how to prevent it.
Among the lingering questions over the outbreak is why hantavirus infected park visitors while sparing employees.
All but one of the nine infected visitors stayed in Curry Village in double-walled, insulated tent cabins later found to be infested with deer mice. The tiny, white-bellied mice carry the airborne virus in their droppings, urine and saliva.
The park closed the infested tent cabins at the end of August, after learning of two of the hantavirus deaths.
This week's screening will examine park workers' blood for antibodies signaling exposure to the hantavirus. Employees also answered questions about where they live, their contact with mice, their job duties and their hantavirus training, Quinley said.
"We've had a lot of employees go through hantavirus training," he said. "We're interested in knowing if the training works."
The voluntary study is part of a broader scientific effort that will include the first whole-genome sequencing for the hantavirus strain t h at struck Yosemite over the summer. It marked the biggest cluster of cases since the disease was first identified in the United States in 1993.
At that time, when hantavirus pulmonary syndrome infected healthy young adults in the Four Corners region of Utah, Colorado, Arizona and New Mexico, Navajo elders linked the outbreak to an abundance of pine nuts and an explosion of mice coming out for the feast.
Since then, more than 600 Americans have been diagnosed with hantavirus pulmonary syndrome. The incurable disease kills more than a third of those infected.
To date, humans have never been known to transmit the virus. People can inhale the hantavirus when mice droppings mix with dust, especially in confined, poorly ventilated spaces.
WHO said that on many levels, the world is better prepared now than ever before for aflu pandemic
Myanmar health officals say an outbreak of H5N1 bird flu in Mandalay
Tokyo Electric said it has been aware since last spring that radiation levels in water running in one of the plant gutters rise when it rains
Safe drinking water is available at about one-third of the level it was before the conflict erupted nearly five years ago, and supplies are cut-off to punish civilians at times
Elephants in Angola, which suffered decades of civil war, have been observed avoiding heavily-mined areas, suggesting their trunks were warning them to stay away.
Favipiravir halved death rate among some to 15 pct, but WHO says more research required on drug
The first medicine containing stem cells to treat a rare condition caused by burns to the eye has approved.
940 parasite samplescollected at 55 malaria treatment centres across Myanmar and its border regions. They found that almost 40 percent of the samples had mutations in their so-called kelch gene, K13 -- a known genetic signal of artemisinin drug resistance.
Yaws is known to be prevalent in 12 countries in areas where people have little access to healthcare, mainly in West and Central Africa, Asia and the Pacific Islands.
In the past few years, Nepal has seen the numbers of endangered species, such as the Royal Bengal tiger or the one-horned rhino, rise.
The investment would represent as little as 0.1 percent of current national health spending of the low and middle-income countries affected by NTD.
Nearly 1,000 abandoned California sea lions have washed ashore this year in what rehabilitation centers say is a growing crisis for the animals.
West Africa cases of Ebola show the first decrease in three weeks.
"Marijuana fools the brain's feeding system."scientist Tamas Horvath said.
The Department of Health (DOH) announced that a Filipina nurse who recently arrived in the country tested positive for the MERS Coronavirus.
North Korea, the world's most isolated country, is thousands of miles from the epicentre of the Ebola outbreak in West Africa, and has reported no cases of the virus, which has killed more than 9,000 people.