Escherichia coli is common kind of  bacteria that lives in the intestines of animals and humans and most are harmless. The most dangerous strain of E.coli is called O157 : H7 because it produces a very power full poison and can make you very sick if it’s in your food or drink. Eating unwashed green such us a spinach, lettuce, or green onions or undercooked beef can cause the infection.

This is a image for Escherichia coli bacteria :



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