It’s our own fault. In the U.S., Japan, Korea and elsewhere, we use antibiotics too much. We use them to treat coughs and colds — for which they’re ineffective. We’ve used them in animal feed in an attempt to prevent disease and to fatten cows and chickens. And the more we use antibiotics, the greater the likelihood that clever bacteria will evolve in ways that resist the attack of antibiotics

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It can actually make them stronger. Antibiotics are wonderful drugs for treating bacterial infections. Unfortunately, disease-causing bacteria can become resistant to antibiotics that are meant to kill them. This is called selective pressure – the bacteria that are susceptible to the drug are killed, but the ones that withstand the antibiotic survive and proliferate

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The rich array of microbiota in our intestines can tell us more than you might think

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