在线国产一区二区_成人黄色片在线观看_国产成人免费_日韩精品免费在线视频_亚洲精品美女久久_欧美一级免费在线观看

  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: 男女啪啪免费网站 | 中文字幕网址在线 | 国产在线观看一区二区三区 | 青青青草视频 | www.久久久久久 | 国产视频一区二区在线 | 日本不卡免费 | 在线观看网址你懂的 | 日韩不卡一区二区 | 欧美精品福利 | 黄色成人小视频 | 色中色综合 | 色婷婷婷| 国产福利av | 91日韩在线| 免费成人黄色网址 | 黄色一级在线观看 | 欧洲精品一区二区 | 日本精品视频在线观看 | 亚洲第一免费视频 | 色在线视频 | 女人黄网站 | 一级特黄视频 | 免费三级网站 | 日韩中文字幕精品 | 日韩av专区| 三级网站免费 | www色 | 青青草精品 | 成年人一级片 | 天天做天天干 | 中文字幕在线观看一区 | 欧美精品综合 | 三级在线观看 | 嫩草国产| 色婷婷综合网 | 爱爱免费小视频 | 影音先锋在线观看视频 | 亚洲激情另类 | 在线一区二区三区 | 国产伦精品一区二区三区视频网站 |