细菌对人体有益

细菌对人体有益 细菌对人体有益 Some of the microbes in our gut are there for a good reason. Like what? Well,there’s a bacterium called thetaiotamicron in the intestines that lives off the food we eat. In return, it helps us digest certain foods by breaking them down into sugars and vitamins. This particular microbe may also regulate certain intestinal genes and help create new blood vessels. Finally, it helps produce a chemical that kills disease-causing bacteria. That doesn't sound too bad. Consider this. Scientists created mutant mice . You mean like with special powers? No,not with special powers.They created mutant mice without any germs in their intestines. These mice ended up getting sick a lot and needed to eat much more than normal mice with intestinal bacteria in order to gain weight. Wo,so I guess bacteria aren't all bad. Nope,in fact, we probably couldn’t do without them. microbe:微生物;细菌 intestine:肠 vessel:血管 mutant:突变体 germ:微生物