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科学美国人60秒:沙门氏菌-托福听力下载

2017-01-04 12:09:07来源：科学美国人60秒

点击查看>>科学美国人60秒音频：沙门氏菌

　　科学美国人60秒中英文翻译：沙门氏菌

　　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.

　　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.

　　Most people tough it out when they get food poisoning from Salmonella.

　　沙门氏菌.jpg

　　That's because treatment with antibiotics would eliminate the infection, but also get rid of the gut bacteria that promote good health.

　　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.

　　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.

　　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.

　　科学美国人60秒英文文本

　　中文翻译请点击下一页

本文关键字: 科学美国人60秒 科学60秒下载 托福听力

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