Navigation Links
Newly discovered virus implicated in deadly Chinese outbreaks
Date:3/22/2011

GALVESTON, Texas Five years ago, large numbers of farmers in central China began falling victim to an mysterious disease marked by high fever, gastrointestinal disorder and an appalling mortality rate as high as 30 percent in initial reports. Investigators from the Chinese Center for Disease Control and Prevention hurried to the scene of the outbreak. On the basis of DNA evidence, they quickly concluded that it had been caused by human granulocytic anaplasmosis, a bacteria transmitted by tick bites.

Now, though, subsequent studies have shown that original conclusion was incorrect, and that a previously unknown and dangerous virus has been responsible for seasonal outbreaks of the disease in six of China's most populated provinces.

"We expected to find a bacterial infection behaving in an unexpected way human anaplasmosis has a less than one percent fatality rate in the U.S., and it rarely causes abdominal pain or vomiting or diarrhea," said Dr. Xue-Jie Yu of the University of Texas Medical Branch at Galveston, lead author of a paper on the discovery now appearing in the "online advance" section of the New England Journal of Medicine. "Instead, we found an unknown virus."

Researchers have dubbed the newly discovered pathogen Severe Fever with Thrombocytopenia Syndrome virus, and placed it in the Bunyaviridae family, along with the hantaviruses and Rift Valley Fever virus. Later investigation has placed its mortality rate at 12 percent, still alarmingly high.

Yu, a specialist in tick-borne bacteria like the species responsible for HGA, first suspected that a virus might be responsible for the outbreaks after close examination of patients' clinical data showed big differences from symptoms produced by HGA, and blood sera drawn from patients revealed no HGA or HGA antibodies.

Yu became certain that a virus was at fault after sera taken from patients retained its ability to kill cells, despite being passed through a filter that blocked all bacteria. Still, initial genetic tests failed to generate a match with a known pathogen.

"Clearly, we had a virus, but what virus?" Yu said. "I told the people I was working with that they needed to be even more careful, because we were working with an unknown."

That caution seemed appropriate when electron microscope studies of deactivated virus particles revealed what appeared to be a hantavirus associated in Asia with hemorrhagic fever and in the Americas with a deadly pulmonary syndrome. But when Yu and his colleagues managed to extract the virus' entire genetic code, they found that it didn't match any other known virus.

When researchers from the Chinese Center for Disease Control and Prevention led by study author Dr. Yu Wang analyzed sera taken from 241 symptomatic patients from Henan, Hubei, Shandong, Anhui, Jiangsu and Liaoning provinces, they found 171 contained either the previously unknown virus itself or antibodies against it. In addition, the scientists found the virus in 10 out of 186 ticks collected from farm animals in the area where the patients lived.

"This seems to be a tick-borne disease, and the disease comes out when the ticks come out, from late March to late July," Yu said. "Fortunately, even though the full life cycle is not clear, we know that for the virus humans are a dead end we don't have human-to-human transmission as we did with SARS."


'/>"/>

Contact: Jim Kelly
jpkelly@utmb.edu
409-772-8791
University of Texas Medical Branch at Galveston
Source:Eurekalert

Related medicine news :

1. Newly discovered role for enzyme in neurodegenerative diseases
2. Newly identified cell population key to immune response
3. More Sex May Help Neurotic Newlyweds
4. Drug combination shows promise for newly diagnosed blood cancer patients, study finds
5. Frequent sex protects marital happiness for neurotic newlyweds
6. Newly discovered regulatory mechanism essential for embryo development and may contribute to cancer
7. More Natural Fat Burning Foods & Ready-Made Meal Plans Added to the Newly Revised Version of The Diet Solution Program
8. Liberty Health shows how the BP Oil Spill may draw attention to the purity of the company's newly released Nutritional Supplements.
9. Color-coded tracking method helps scientists analyze outcomes of newly transplanted tissue
10. Altered brain development found in children with newly diagnosed epilepsy
11. Caregivers Find Hearing Loss Newly Relaunched Website a Welcome Help
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/25/2016)... ... June 25, 2016 , ... "With 30 hand-drawn hand gesture animations, ... Christina Austin - CEO of Pixel Film Studios. , ProHand Cartoon’s package transforms ... Final Cut Pro X . Simply select a ProHand generator and drag it above ...
(Date:6/25/2016)... (PRWEB) , ... June 25, 2016 , ... On Friday, ... presented a Bronze Wellness at Work award to iHire in recognition of their exemplary ... part of the 7th annual Maryland Workplace Health & Wellness Symposium at the BWI ...
(Date:6/24/2016)... ... June 24, 2016 , ... June 19, 2016 is World Sickle ... chronic pain and the benefits of holistic treatments, Serenity Recovery Center of ... Sickle Cell Disease. , Sickle Cell Disease (SCD) is a disorder of the red ...
(Date:6/24/2016)... CA (PRWEB) , ... June 24, 2016 , ... ... is now offering micro-osteoperforation for accelerated orthodontic treatment. Dr. Cheng has extensive experience ... Damon brackets , AcceleDent, and accelerated osteogenic orthodontics. , Micro-osteoperforation is ...
(Date:6/24/2016)... (PRWEB) , ... June 24, 2016 , ... ... today at the Clinical Decision Making in Emergency Medicine conference in Ponte Vedra ... authored journal articles published in Emergency Medicine Practice and Pediatric Emergency ...
Breaking Medicine News(10 mins):
(Date:6/23/2016)... , June 23, 2016 , ... Thursday, July 7, 2016 , , , , LOCATION: , ... , , , , EXPERT PANELISTS:  , , , Frost ... Industry Analyst, Christi Bird; Senior Industry Analyst, Divyaa Ravishankar and Unmesh ... The global pharmaceutical industry is witnessing an exceptional era. Several ...
(Date:6/23/2016)... LONDON , June 23, 2016 ... environments  Oticon , industry leaders in ... the launch of Oticon Opn ™, the world,s ... world of possibilities for IoT devices.      ... Opn, Oticon introduces a number of ,world firsts,: ...
(Date:6/23/2016)... DUBLIN , June 23, 2016 ... the "Surgical Procedure Volumes: Global Analysis (United States, ... Australia, Canada)" report to their offering. ... an essential tool for healthcare business planners, provides surgical ... looks at surgery trends with an in-depth analysis of ...
Breaking Medicine Technology: