Unlike viruses, bacteria are living single-celled organisms that can reproduce both outside and inside the body. Like all living things, bacteria create waste – microscopic poops that can act as a poison inside the host. You can blame sore throats, ear infections, and tooth-tartar buildup on bacteria. One of the most famous bacteria is Escherichia coli. This rod-shaped microbe lives deep in your intestines, the body’s busiest bacterial neighborhood. Harmful ones make you puke for days. Helpful E. coli strains produce an important victim. That’s right – some bacteria are actually good for you!
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