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1 .This is Scientific American 60-Second Science. I'm Sophie Bushwick. Got a minute?
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2 .During a physical exam, doctors pick up a lot from their patients.
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3 .Including that patient's bacteria.
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4 .To keep infections from spreading, physicians try to always wash their hands between exams.
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5 .But they don't always scrub their stethoscopes.
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6 .To see just how much bacteria these instruments gather, doctors examined 71 patients, using sterile stethoscopes and gloves.
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7 .After each exam, researchers collected samples from the stethoscope's surface and tube, as well as four parts of the physician's gloved hands: the fingertips, backs and two locations on the palm.
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8 .The fingertips became by far the most bacterially contaminated.
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9 .But the runner-up was the stethoscope's surface, which gathered more microbes than the palms or the backs of the hands.
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10 .The study is in Mayo Clinic Proceedings.
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11 .Although fingertips picked up more than five times as much bacteria as stethoscopes did, doctors reduce that contamination before seeing the next patient by cleaning their hands.
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12 .According to this study's authors, stethoscopes should get the same treatment.
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13 .Then the only thing to fear is the stethoscope's icy temperature.
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14 .Thanks for the minute, for Scientific American 60-Second Science. I'm Sophie Bushwick.
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