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User Image srezzonico Posted: May 1, 2012 12:06 PM (UTC)

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Bacteriologist Ira Koch has an obsessive habit of watching people and estimating how much bacteria is transferred between them in their daily interactions — a kiss here, a handshake there, a slight touch of a shoulder. He enjoys long walks by the water, strong espresso and has recently enlisted his expertise to a team of British scientists who are exploring cockroach brains as a new source of antibiotics. More stories on 84portraits.tumblr.com. / Caption by @girloclock

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