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Rod-shaped bacteria. Conceptual computer artwork of differently coloured rod-shaped bacteria (bacilli). This represents friendly bacteria, those that do not cause disease in humans, but are useful to them. These include the bacteria found in a healthy person's intestines, and on the skin. These bacteria can help prevent harmful (pathogenic) bacteria breeding and causing an infection. Bacteria are also helpful to humans in the fermentation of dairy products and alcoholic drinks.
May 2nd, 2013
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