www.xinhuanet.com
XINHUA online
CHINA VIEW
VIEW CHINA
 Breaking News Japanese court rules PM's war shrine visit unconstitutional     US official says tough talks ahead in six-party talks    Roberts sworn in as US chief justice    62 killed in three car bombs in Iraq    Bush, Abbas talks to focus on Gaza security: US spokesman    Interpol looks for 75 terrorists wanted by Russia    
Home  
China  
World  
Business  
Technology  
Opinion  
Culture/Edu  
Sports  
Entertainment  
Life/Health  
Travel  
Weather  
RSS  
  About China
  Map
  History
  Constitution
  CPC & Other Parties
  State Organs
  Local Leadership
  White Papers
  Statistics
  Major Projects
  English Websites
  BizChina
- Conferences & Exhibitions
- Investment
- Bidding
- Enterprises
- Policy update
- Technological & Economic Development Zones
Source Manufacturers and Suppliers from China and around the world
   News Photos Voice People BizChina Feature About us   
Wild bats are SARS virus' natural host: study
www.chinaview.cn 2005-09-30 12:59:24

Several bat species are natural hosts of coronaviruses closely related to the SARS virus, an international research group reported on Thursday.
Several bat species are natural hosts of coronaviruses closely related to the SARS virus, an international research group reported on Thursday.

    LOS ANGELES, Sept.29 (Xinhuanet) -- Several bat species are natural hosts of coronaviruses closely related to the SARS virus, an international research group reported on Thursday.

    In this latest study, researchers from China, Australia,and the United States tested a variety of wild bats from fourlocations in China for coronaviruses.

    They found in wild bats several genetically diverse coronaviruses, one of which very closely resembles the SARS virus.They noted that bats are the original source of the killer virus.

    The SARS virus itself is a member of this coronavirus group, researchers said.

    The new findings will appear in the Sept. 30 online issue of the journal Science.

    Since the SARS outbreak in year 2002-03 that killed about 800people, scientists have been hunting for the natural reservoir ofthe SARS virus.

    Previous studies have found that palm civets sold at the liveanimal markets were infected with the SARS virus, but further evidence suggested that these animals were not themselves the original hosts, the researchers said.

    Bats are hosts of several other known viruses, including Hendraand Nipah viruses, and they can be infected with many viruses butrarely display clinical symptoms. They're also increasingly presentin food and traditional medicine markets in southern China and elsewhere in Asia.

    In this study conducted in 2004, the researchers trapped408 bats from their native habitat in the Chinese provinces of Guangdong, Guangxi, Hubei, and Tianjin. Nine bat species, 6 generaand 3 families were included in the samples.

    The researchers collected those bats' blood, fecal and throatswabs, and analyzed their serum samples along with DNA from fecal or throat samples using different methods independently inlaboratories in Wuhan, China and Geelong, Australia.

    They found that three communal, cave-dwelling bat species from

    the horseshoe bat family demonstrated a high SARS-coronavirusantibody prevalence. Among them, 71 percent samples of the Rhinolophuspussilus species trapped in Guangxi showed positive.

    "The high seroprevalence and wide distribution of seropositive

    bats is expected for a wildlife reservoir host for a pathogen,"wrote the researchers.

    The coronaviruses found in bat samples were genetically diverse,but they all show some similarity to the SARS coronavirus that aroused the pandemic, the researchers noted. Genetical identitybetween a bat virus strain and the SARS coronavirus even reached 94 percent.

    Earlier this month, a team led by Professor Kwok-yung Yuen ofthe Hong Kong University also reported a coronavirus in wild batsto be close relative of the SARS virus.

    But compared with these newly found SARS-like bat viruses, the bat SARS coronavirus identified by Hong Kong researchers are genetically more distant to the human SARS virus, according to the researchers.

    The SARS-coronavirus found in humans and the SARS likecoronavirus found in bats will be collectively called the SARScluster of coronaviruses, the researchers suggested, noting thatSARS-coronavirus may phylogenetically belong to the family of those bat viruses. Enditem

  Related Story
Milan spring/ summer 2006 fashion week
Wildfires sweep Southern California
Chiling Lin's sexest!
- CPC sets date for Central Committee plenum
- Wild bats are SARS virus' natural host: study
- Japanese court rules PM's shrine visit unconstitutional
- Audit uncovers litany of abuses
- Violence surges ahead of Oct. 15 constitution referendum in Iraq
- No US-China textile deal; more talks in October
- Nuclear material trafficking cases increasing, IAEA
- US embassy denies having plan to invade Venezuela
- PM Koizumi's Shrine visit unconstitutional
- Fatah wins part of municipal election
- 62 killed in 3 car bombs in Iraq
- Blair apologizes to anti-war activist Labour member
- Pakistan denies providing nuke material to DPRK: PM
- Turkey says possible not to start EU entry talks on time
- Taliban intensifies activities in post-election Afghanistan
- US House Republicans select Blunt as majority leader
Copyright ©2003 Xinhua News Agency. All rights reserved.
Reproduction in whole or in part without permission is prohibited.