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Why all bacteria harmful or why no?

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Anonymous

16y ago
Updated: 8/17/2019

Bacteria may be harmful or helpful to humans. Some bacteria may cause lethal diseases when infecting humans, whereas others may be necessary to help maintain optimal health in humans (such as those in the small intestine which produce Vitamin K). Other bacteria help us with the production of various foods (cheese) and beverages (beer and wine).

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Wiki User

16y ago

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