字神帝國英語天地

今日主題：Salmonella's Favorite Food Could Be Its Achilles' Heel / 沙門氏菌最喜愛的食物可能是其致命弱點

洪欣老師推薦：托福聽力最好的課外教材：60-Second Science

康康精選托福會考的主題，堅持每天精聽一定會進步的哦!!

建議方法：

1. 先聽兩三遍 (不看文稿)

2. 再一句一句聽寫 (每句都要聽寫數遍，直到寫出85%以上的字)

3. 最後check文稿，看哪聽不出來，單字沒背過，還是發音不熟。

4. 堅持天天聽，就能每天進步哦。

#科學人SSS

MP3音檔 (按右鍵可下載聽)：喜歡的同學，幫忙推或按讚哦~~

http://online1.tingclass.net/voaspe/…/20140724sa_science.mp3

只有音檔怎夠，聽不懂地方，不用怕，

康康幫你準備好中英文稿了：

中英文稿：

Summer’s here and with it come picnics, barbecues and of course Salmonella. The germ is notorious for contaminating a variety of favorite warm-weather foods. But the bacteria’s palate is more limited than ours.

夏天經常會有野餐和燒烤，當然這樣也會容易受到沙門氏菌的侵擾。這種細菌就是以污染各種令人喜愛的燒烤類熱食物而臭名昭著。但是這種細菌的味覺比我們要有限得多。

Once Salmonella makes its way into your system, it relies on a single unusual nutrient to survive. That’s according to a study in the journal PLOS Pathogens. [Mohamed M. Ali et al, Fructose-Asparagine Is a Primary Nutrient during Growth of Salmonella in the Inflamed Intestine]

一旦沙門氏菌進入你的身體，它會依靠一個不尋常的營養物來生存。這是發表在《公共科學圖書館•病原體》期刊上的一項研究。

Most people tough it out when they get food poisoning from Salmonella. That’s because treatment with antibiotics would eliminate the infection, but also get rid of the gut bacteria that promote good health. You can find more 60-Second science on chinavoa.com.

大多數人吃了被沙門氏菌污染的食物可以挺過去。那是因為如果用抗生素治療可以消除感染，但是也會除去有益於身體健康的腸道細菌。

To figure out how to target Salmonella specifically, researchers screened for genes vital for the microbe’s survival during the active phase of infection. And they identified a cluster of five genes that work together to allow the bacteria to digest a molecule called fructose-asparagine.

為了弄清楚如何才能只消滅沙門氏菌，研究人員篩查了沙門氏菌感染活躍期對其生存至關重要的基因。他們鑒定出一個包含五個基因的基因組，共同努力促使該沙門氏菌消化了一個叫做果糖-天冬醯胺的微粒。

No other organisms are known to use this chemical for fuel, so starving Salmonella of it could be a new strategy for fighting this foodborne bug while leaving desirable intestinal inhabitants unharmed.

據我們所知，沒有其他生物體會以這種化學物質為食，所以使沙門氏菌挨餓可能會是既能對抗這種食源性細菌，又可以保護有益於身體健康的腸道居民安然無恙的一種新策略。

Next, the researchers plan to see which foods contain large amounts of Salmonella’s go-to snack. But please, don’t send unsolicited samples of Aunt Agnes’s egg salad.

—Karen Hopkin

接下來，研究人員計畫研究一下什麼食物裡含有大量的沙門氏菌首選零食。但是請不要寄來艾格尼絲阿姨的雞蛋沙拉這樣的來路不明的樣本。——凱倫•霍普金。