Home>News Center>World
         
 

Bird flu virus in Vietnam mutates - report
(Xinhua)
Updated: 2005-11-12 15:02

Vietnam's Ho Chi Minh City Pasteur Institute has found that the bird flu virus strain H5N1 in the country has mutated to make it more dangerous, local newspaper Youth reported Saturday.

There are some changes in gene segments of surface antigens HA and NA and some other gene segments of bird flu virus type A subtype H5N1 in Vietnam in early 2005, which indicates that the virus has been mutating to reproduce effectively in cell of mammals, and increase its attacking capability, according to results of the institute's research on 24 virus samples from infected poultry and people in the southern region between December 2003 and March 2005.

Bird flu virus in Vietnam mutates - report
Vietnamese health workers walk past the National Institute for Clinical Research in Tropical Medicine, a hospice for infected bird flu patients, in Hanoi, Vietnam November 11, 2005.[Reuters]
Besides, all the viruses researched by the institute in southern Ho Chi Minh City are resistant to the two antiviral medicine agents of Amantadine and Rimantadine. Therefore, it is necessary to keep close surveillance on H5N1's resistance to Oseltamivir (active agent contained in bird flu medicine Tamiflu),the report stated, warning that people will be likely to have to face the human-to-human transmission of H5N1.

The institute has decoded completely or partly genes of 24 virus samples. Five samples from humans and 16 from fowls have been decoded completely.

However, the institute has been unable to define which kinds ofmutations allow human-to-human transmission, and which conditions lead to the mutations.

"To cause flu in people, the bird flu virus must mutate on certain conditions so that it can penetrate into human cells," Hoang Thuy Long, a leading epidemiologist in Vietnam, told Xinhua recently.

This leads to two hypotheses: H5N1 passes from chickens to humans on certain conditions, and the virus transmits to humans via a mammal, he said.

To successfully penetrate into a person's cells, H5N1 must mutate, while the victim must have defective immune systems. "Otherwise, the virus in poultry must combine with flu viruses in amammal such as pigs, buffaloes, cows, dogs and cats to form a new strain," Long confirmed.

Up to 92 Vietnamese people from 32 cities and provinces have been infected with bird flu virus strain H5N1 since the disease started to appear in the country in late 2003, according to the Vietnamese Ministry of Health.

The World Health Organization, on Nov. 9, confirmed a total of 125 human cases of bird flu infections, including 64 deaths, in Southeast Asia since December 2003. Of the fatalities, 42 are fromVietnam, 13 from Thailand, 5 from Indonesia and 4 from Cambodia.



USS Park Royal crew await for Rice
Coffin of Milosevic flew to Belgrade
Kidnapping spree in Gaza Strip
 
  Today's Top News     Top World News
 

Australia, US, Japan praise China for Asia engagement

 

   
 

Banker: China doing its best on flexible yuan

 

   
 

Hopes high for oil pipeline deal

 

   
 

Possibilities of bird flu outbreaks reduced

 

   
 

Milosevic buried after emotional farewell

 

   
 

China considers trade contracts in India

 

   
  Journalist's alleged killers held in Iraq
   
  No poisons found in Milosevic's body
   
  US, Britain, France upbeat on Iran agreement
   
  Fatah officials call for Abbas to resign
   
  Sectarian violence increases in Iraq
   
  US support for troops in Iraq hits new low
   
 
  Go to Another Section  
 
 
  Story Tools  
   
  Related Stories  
   
Bird flu fear hits poultry industry of Nepal
   
No pigs infected by bird flu in Hunan - official
   
Kuwait has Mideast's first bird flu case
Manufacturers, Exporters, Wholesalers - Global trade starts here.
Advertisement
         
主站蜘蛛池模板: 久久精品人人爽人人爽快| 免费看美女被靠到爽的视频| 182在线播放| 天堂俺去俺来也WWW色官网| 中文字幕日韩视频| 日韩人妻不卡一区二区三区 | 怡红院av一区二区三区| 久久久久国色AV免费观看性色| 杨钰莹欲乱小说| 亚洲成av人片不卡无码| 深夜a级毛片免费视频| 免费女人18毛片a级毛片视频| 综合一区自拍亚洲综合图区| 国产久视频观看| 黄在线观看网站| 国产无套在线播放| 亚洲国产老鸭窝一区二区三区| 国产精品白浆在线播放| 99re热精品这里精品| 天堂在线观看中文字幕| www.夜夜操.com| 影音先锋在线免费观看| 中文字幕人妻无码一夲道| 日本亚洲黄色片| 久久大香香蕉国产免费网站| 日韩精品久久久久久免费| 亚洲VA中文字幕无码毛片| 欧美三级不卡在线观线看高清| 亚洲成A人片在线观看无码| 正在播放国产女免费| 亚洲黄色激情网| 狠狠综合久久av一区二区| 免费一级欧美在线观看视频片| 精品人人妻人人澡人人爽人人 | 九九免费久久这里有精品23| 桃子视频在线官网观看免费 | 欧美极品欧美日韩| 亚洲欧美日韩中文高清ww| 欧美老熟妇乱子伦视频| 亚洲欧洲日本在线| 欧美手机在线视频|