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What is listeria? A microbiologist explains the bacterium behind recent deadly food poisoning outbreaks

By Yvonne Sun, Assistant Professor of Microbiology, University of Dayton

Bacteria do, and will, end up in food. Everyone eats – intentionally or unintentionally – millions to billions of live microbes every day.

Most are completely harmless, but some can cause serious illnesses in humans. Because of these potential pathogens, there is a long list of foods to avoid, including uncooked eggs, raw fish and unwashed fruits and vegetables, particularly for pregnant…

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