久久亚洲国产成人影院-久久亚洲国产的中文-久久亚洲国产高清-久久亚洲国产精品-亚洲图片偷拍自拍-亚洲图色视频

  Home>News Center>World
         
 

Airborne SARS transmission possible -- study
(Xinhua)
Updated: 2005-03-24 10:20

Two new studies present evidence that the virus causing severe acute respiratory syndrome (SARS) may spread through the air, not just through direct contact with contaminated water droplets as previous research had shown, the Infectious Diseases Association of America (IDSA) reported on Wednesday.

SARS coronavirus was detected in the air in a patient's room during the 2003 outbreak in Toronto, according to the Canadian study. The Hong Kong study shows patients in hospital bays near a SARS patient had a much higher infection rate than patients in distant bays, consistent with the possibility of airborne SARS transmission.

In the Hong Kong study, which focused on the 2003 SARS outbreak at the Prince of Wales Hospital, 41 percent of patients admitted to the ward in which the first SARS patient was staying became infected.

Proximity to the bed of the first case seemed to be strongly linked with two-thirds of patients in the same bay infected and half of patients in an adjacent bay were infected with SARS, while only 18 percent of patients in distant bays were infected.

The researchers at the Chinese University of Hong Kong speculated that the increased risk of infection with closer proximity to the index SARS case suggests airborne transmission. Although they do not have "direct proof" of airborne transmission.

"No other known routes of infectious diseases transmission could adequately explain the spread of the disease in the outbreak, and hence we feel that the evidence is quite strong," the researchers wrote.

The Canadian research was conducted during the SARS outbreak in Toronto in March 2003. The results mark the first experimental confirmation of the presence of the SARS virus in the air of an infected patient's hospital room.

The authors cautioned that their results do not document any cases of airborne transmission of the SARS virus from one person to another, only the dissemination of the virus from an infected patient to the air, via breathing or coughing.

During the outbreak in Toronto hospitals, health care workers became infected with the virus despite observance of strict infection control precautions. The investigators wondered whether environmental contamination of hospital air or surfaces could explain the ongoing risk of SARS coronavirus transmission to health care workers.

To answer this question, they collected patient information and environmental samples from the SARS units of four Toronto hospitals.

SARS coronavirus was detected in the air in one of the four rooms tested. The researchers also detected virus in four of 85 surface samples taken from frequently touched surfaces, highlighting the importance of strict adherence to infection control precautions to prevent SARS coronavirus transmission in the health care setting.

An editorial accompanying the Toronto study, by Tommy Tong of Princess Margaret Hospital in Hong Kong, China, emphasized the scientific significance of discovering SARS coronavirus in the air in a patient's room.

"Although the possibility of airborne dissemination of SARS coronavirus has been controversial," he wrote, "this important work shows beyond doubt that SARS coronavirus aerosol generation can occur from a patient with SARS."



 
  Today's Top News     Top World News
 

'Three-good' student system under revision

 

   
 

Japan's bid for UNSC seat opposed

 

   
 

Beijing unveils security plan for Olympics

 

   
 

Hu: Nation willing to restart nuke talks

 

   
 

EU official calls China embargo 'unfair'

 

   
 

Watchdog investigates baby oil fears

 

   
  Pressure mounts on North Korea for nuclear talks
   
  Arab leaders relaunch peace offer
   
  At least 14 dead in US refinery blast
   
  UK troops set to stay in Iraq until 2006
   
  Annan's son faces fresh allegations in UN scandal
   
  Sharon overcomes key hurdle to Gaza pullout
   
 
  Go to Another Section  
 
 
  Story Tools  
   
  News Talk  
  Are the Republicans exploiting the memory of 9/11?  
Advertisement
         
主站蜘蛛池模板: 国产中文字幕在线观看 | 国产精品亚洲精品 | 精品中文字幕一区在线 | www射射一区| 成人国产精品视频频 | 欧美成人高清手机在线视频 | 手机看黄av免费网址 | 91小视频在线观看免费版高清 | jiz欧美高清 | 国产综合久久久久 | 久久久久久久久久久久福利 | 亚洲 中文 欧美 日韩 在线人 | 99精品视频在线在线视频观看 | 91精品国产高清91久久久久久 | 荡公乱妇蒂芙尼中文字幕 | 国产精品久久久久影院色老大 | 久久精品国产一区二区三区不卡 | 国产精品久久久久国产精品 | 99久久精品费精品国产一区二区 | 极品欧美 | 免费aⅴ在线 | 成年男女拍拍拍免费视频 | 免费在线观看毛片 | a免费毛片在线播放 | 国产欧美一区二区三区沐欲 | 色日韩在线 | 成年女人免费看 | 在线观看亚洲免费视频 | 亚久久伊人精品青青草原2020 | 久久精品无遮挡一级毛片 | 久久在线 | 成年女人免费视频播放成年m | 久久精品全国免费观看国产 | 中国a级黄色片 | 成人午夜爽爽爽免费视频 | 在线小毛片 | 国产精品福利社 | 欧美一级毛片欧美一级成人毛片 | 午夜视频在线观看一区 | 久久精品网站免费观看 | 日韩久操|