Bacteria are ubiquitous, mostly free-living organisms often consisting of one biological cell. They constitute a large domain of prokaryotic microorganisms. Typically a few micrometres in length, …

Despite this large number, scientists estimate that pathogens make up less than 7% of all described bacterial species [2]. In fact, bacteria … Most types of bacteria aren’t harmful. Some are even good for you. These helpful bacteria are mainly located on your skin or in your gut or digestive system. They’re called resident flora, or your …

These helpful bacteria are mainly located on your skin or in your gut or digestive system. They’re called resident flora, or your …