您現(xiàn)在的位置: > Language Tips > Audio & Video > Special Speed News  
     





     
    Growing rice and a cholera vaccine at the same time
    [ 2007-06-26 09:16 ]

    This is the VOA Special English Agriculture Report.

    Someday, rice plants might not only provide food but also a way to prevent cholera and other diseases.

    Cholera is a bacterial infection of the intestines. Today it is found mostly in Africa, Asia and Latin America. Current vaccines to protect against cholera must be kept in cold storage. The need for refrigeration limits use in poor countries.

    But research in Japan may lead to rice plants that contain a cholera vaccine that does not need to be kept cold. So far, the research has been carried out only on mice. The Proceedings of the National Academy of Sciences in the United States published the study earlier this month.

    Hiroshi Kiyono of the University of Tokyo and his team experimented with genetic material from the bacterium responsible for cholera. They placed it into the Kitaake rice plant.

    Mice ate the genetically changed rice seeds as a powder. The report says the vaccine was not destroyed by stomach acid; instead, the animals developed antibodies against the cholera toxin. The scientists say the vaccine remained active even after being stored at room temperature for more than a year and a half.

    People would take the vaccine as a drug that contains the powder.

    Cholera is usually spread through water or food, in places where conditions are dirty and drinking water supplies are unsafe. Cholera infections are often mild. But some people develop severe cases. The World Health Organization says half of them will die if they are not treated.

    The researchers say the experimental cholera vaccine produced reactions in the immune system and in areas of mucosal tissue. Mucosal surfaces include the mouth, nose and reproductive organs. Cholera as well as viruses like those that cause influenza and AIDS infect these areas.

    The scientists have great hopes for rice-based vaccines as a way to protect large populations against mucosal infections. There would be no need for injection, since the vaccine would be taken by mouth.

    Yet scientists have tried for some time to make plant-based vaccines. Researchers in the United States have developed one for Newcastle disease in chickens, but so far there are no products for humans. At the same time, scientists have to deal with concerns about genetically engineered plants accidentally mixing with food crops.

    And that's the VOA Special English Agriculture Report, written by Jerilyn Watson.

    cholera :霍亂


    點擊進入更多VOA慢速

    (來源:VOA  英語點津姍姍編輯)

     
     
    相關文章 Related Stories
     
             
     
     
     
     
     
             

     

     

     
     

    48小時內最熱門

         

    本頻道最新推薦

         
      Kidnapped Gaza BBC correspondent in new video
      《追夢女郎》(精講之四)
      Hamas-Fatah leadership split in Palestinian
      Blair to steps down after 10 years in power
      What's up in the bond market?

    論壇熱貼

         
      AUDEN的一首詩----Funeral Blues葬禮藍調
      wherever you are, be there. 如何翻譯
      幫忙翻譯:高溫費、黃梅季節(jié)
      Supposed I have a flight ticket without destination
      Health Tip: Creating a Healthy Body Image(e-c)practice
      how to translate "國稅" "地稅" "工商稅"?????






    欧美日韩毛片熟妇有码无码 | 亚洲国产91精品无码专区| 一级片无码中文字幕乱伦| 伊人蕉久中文字幕无码专区| 欧洲成人午夜精品无码区久久| 国产欧美日韩中文字幕| 亚洲AV无码乱码在线观看| 日韩爆乳一区二区无码| 亚洲成av人片在线观看无码不卡| 中文字幕日韩一区二区三区不卡| 亚洲AV无码不卡在线观看下载 | 国产网红主播无码精品 | 国产麻豆天美果冻无码视频| 亚洲av中文无码乱人伦在线r▽ | 日韩三级中文字幕| 亚洲国产a∨无码中文777| 无码人妻精品一区二区蜜桃百度| 久久久久久无码Av成人影院| 亚洲av无码国产精品夜色午夜| 国产啪亚洲国产精品无码| 久久精品?ⅴ无码中文字幕| 亚洲中文字幕无码一区| 中国少妇无码专区| 久久亚洲av无码精品浪潮| 国精品无码一区二区三区在线| 无码人妻精品一区二区三区在线| 亚洲爆乳无码专区| 亚洲午夜无码久久久久| 最新无码A∨在线观看| 高清无码午夜福利在线观看 | 中文字幕无码高清晰| 亚洲VA中文字幕不卡无码| 久久精品中文无码资源站| 亚洲中文字幕无码一去台湾| 亚洲最大激情中文字幕| 亚洲乳大丰满中文字幕| 日韩中文字幕欧美另类视频| 最近最新高清免费中文字幕| 中文字幕一区二区三区日韩精品 | 无码人妻少妇久久中文字幕蜜桃| 亚洲成A人片在线观看无码不卡|