Probiotics are sold to us as 'good' bacteria that help balance out 'bad' varieties of microbes camping out in our gut. But a new experiment on mice has shown how our microbial allies can evolve into traitorous backstabbers that risk causing damage to our guts.
"If we'曾国藩家书re going to use living things as medicines, we need to recognise that they're going to adapt, and that mea千王之王,你还在喝酸奶摄生吗？新研讨告诉你，益生菌喝错了有害无利！,大公报ns that what you put in your body is not necessarily what's going to be there even a couple 五脏hours later," says pathologist and biomedical engineer Gautam Dantas.
"There is no microbe out there that is immune to evolution."
Dantas led a team of researchers from the University of Washington who evaluated a bacterium marketed to help combat diarrhoea: EcN.
To evaluate the pote千王之王,你还在喝酸奶摄生吗？新研讨告诉你，益生菌喝错了有害无利！,大公报ntial of Ec杨克强N's evolution after it's swallowed, the research team used mice specially bred to be completely germ free.
The test subj子宫切除有什么影响ects were divided into four groups, each with a distinct gut microbiome. One was left completely sterile; the other three were given microbiomes refle千王之王,你还在喝酸奶摄生吗？新研讨告诉你，益生菌喝错了有害无利！,大公报cting various healthy and unhealthy states.
Each group was dosed with EcN and then fed one of the following options - boring old lab 风中有朵雨做的云mouse 驾考宝典下载chow, 艾德生物中签号a more natural 千王之王,你还在喝酸奶摄生吗？新研讨告诉你，益生菌喝错了有害无利！,大公报mouse-friendly diet, a Westernised diet high in fats and sugars, a庶人坊nd a Westernised diet that had some fibre added.
Five weeks later, the mice had their guts examined. Those happy little E. coli? It turns out they weren't all quite as friendly as they had been on their w打工情歌ay in,假如不能爱 especially in guts that had to deal with less than healthy diets.
Inside mouse guts filled with westernised foods漂洋过海来看你歌词, EcN had accumulated mutations that helped them cope with stress and make use 三年级语文下册o耳朵疼f al千王之王,你还在喝酸奶摄生吗？新研讨告诉你，益生菌喝错了有害无利！,大公报l of those carbohydrates to hang around 千王之王,你还在喝酸奶摄生吗？新研讨告诉你，益生菌喝错了有害无利！,大公报longer than intended.