Do Farts Contaminate Operating Theatres

Dr. Karl Kruszelnicki designed an experiment after a nurse asked whether her farts could contaminate an operating theater. He had a subject pass gas onto Petri dishes once with his pants down and once while fully clothed. When the subject’s pants were down, bacteria sprouted on the dishes, showing that the gas carried microbes. When he was fully clothed, no bacteria grew, suggesting that clothing acts as a filter.

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