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

 
 
 

Designing an alternative to antibiotics

中國日報網 2012-09-07 10:34

 

Get Flash Player

Get Flash Player

Download

This is the VOA Special English Health Report.

In 1928 a British scientist made a "chance observation." He noticed that some mold had grown in bacteria in a culture plate in his laboratory. Molds can do that. But this mold that had somehow gotten into the plate had the ability to kill the bacteria around it.

The scientist, Alexander Fleming, found that the mold was a member of a common group known as Penicillium. Fleming and two other scientists -- Ernst Boris Chain and Howard Walter Florey -- went on to win the Nobel Prize in 1945. They were honored "for the discovery of penicillin and its curative effect in various infectious diseases."

Other powerful antibiotics have been discovered since penicillin. But many antibiotics have become less and less effective as the germs they are designed to kill develop resistance.

So scientists are searching for new ways to treat infections. Now, researchers in Australia say they have made a important discovery. Scientists at Monash University in Melbourne believe an antibacterial viral protein called PlyC could be used as an alternative to antibiotics.

This protein was first identified as a possible treatment for infections in 1925. But the research ended following the discovery of antibiotics.

Now, scientists have spent six years studying the structure of the protein. They have found how it kills the bacteria that cause sore throats, pneumonia and streptococcal toxic shock syndrome.

Australian researchers worked with scientists at the Rockefeller University in New York and the University of Maryland. Their findings appear in the Proceedings of the National Academy of Sciences.

Dr. Sheena McGowan from Monash University describes the protein as a powerful bacterial killing machine. She says it looks like a flying saucer carrying a pair of warheads. It connects to the surface of the bacterium and then cuts though the outside to destroy it.

Sheena McGowan says it could be highly valuable when conditions like pneumonia do not respond to traditional treatments.

SHEENA MCGOWAN: "There's antibiotics at the moment for those particular types of diseases. We sort of see that there's a bit of resistance being built up in the bacterial community almost, and some of our antibiotics aren't quite as effective as they used to be. So this kind of ground route, basic research needs to be done quite early so that we have some time to develop them as safe human therapeutic over the timeframe when the antibiotics can keep working."

The researchers have been studying PlyC's atomic structure to try to develop a drug. They say they have had success in treating streptococcal infections in mice. But an effective human treatment in the form of a pill or nasal spray may be at least ten years away.

And that's the VOA Special English Health Report. I'm Steve Ember

相關閱讀

National 9/11 museum at standstill as anniversary nears(視頻)

US automakers bet billions on Russian car boom(視頻)

Easing pain in the sick and dying

Men face higher death risk, but why?

(來源:VOA 編輯:Julie)

 
中國日報網英語點津版權說明:凡注明來源為“中國日報網英語點津:XXX(署名)”的原創作品,除與中國日報網簽署英語點津內容授權協議的網站外,其他任何網站或單位未經允許不得非法盜鏈、轉載和使用,違者必究。如需使用,請與010-84883561聯系;凡本網注明“來源:XXX(非英語點津)”的作品,均轉載自其它媒體,目的在于傳播更多信息,其他媒體如需轉載,請與稿件來源方聯系,如產生任何問題與本網無關;本網所發布的歌曲、電影片段,版權歸原作者所有,僅供學習與研究,如果侵權,請提供版權證明,以便盡快刪除。

中國日報網雙語新聞

掃描左側二維碼

添加Chinadaily_Mobile
你想看的我們這兒都有!

中國日報雙語手機報

點擊左側圖標查看訂閱方式

中國首份雙語手機報
學英語看資訊一個都不能少!

關注和訂閱

本文相關閱讀
人氣排行
搜熱詞
 
 
精華欄目
 

閱讀

詞匯

視聽

翻譯

口語

合作

 

關于我們 | 聯系方式 | 招聘信息

Copyright by chinadaily.com.cn. All rights reserved. None of this material may be used for any commercial or public use. Reproduction in whole or in part without permission is prohibited. 版權聲明:本網站所刊登的中國日報網英語點津內容,版權屬中國日報網所有,未經協議授權,禁止下載使用。 歡迎愿意與本網站合作的單位或個人與我們聯系。

電話:8610-84883645

傳真:8610-84883500

Email: languagetips@chinadaily.com.cn

主站蜘蛛池模板: 亚洲精品区在线播放一区二区 | 成年女人免费视频播放成年m | 国产一级一片免费播放视频 | 91视频社区 | 久久网站免费 | 国产亚洲自在精品久久 | 免费一级特黄3大片视频 | 在线播放另类 | 一级毛片免费不卡在线 | 日美三级 | 国产成人久久一区二区三区 | 欧美做暖小视频xo免费 | 加勒比综合 | 久久久高清免费视频 | 黄色网址视频在线观看 | 欧美高清在线 | 亚洲精品韩国美女在线 | 日韩欧美一区二区在线 | 日韩精品亚洲人成在线观看 | 久久免费精品一区二区 | 99爱视频 | 欧美日韩视频在线第一区二区三区 | 国产一区二区三区手机在线观看 | 日韩在线视频一区二区三区 | 美女又黄又免费 | 亚洲三级视频 | 国产精品久久久久久久y | 亚洲免费网站在线观看 | 一级特黄牲大片免费视频 | 国产精品特级毛片一区二区三区 | 欧美成人午夜毛片免费影院 | 亚洲欧美日本国产综合在线 | 999热精品这里在线观看 | 久久亚洲精品中文字幕三区 | 18视频免费网址在线观看 | 久久精品www| 97国产成人精品免费视频 | 国产一二三区视频 | 精品三级网站 | 国产黄色激情视频 | 亚洲天堂一区在线 |