'Fingerprint' of Germs Unique to Each Individual

They were able to map a unique bacterial genetic signature left by nine different people, and said this germy DNA lasted though day-to-day temperature changes, humidity and sunlight.

"Each one of us leaves a unique trail of bugs behind as we travel through our daily lives," Noah Fierer, a researcher at the University of Colorado at Boulder who led the study, said in a statement.

"While this project is still in its preliminary stages, we think the technique could eventually become a valuable new item in the toolbox of forensic scientists," he said.

Researchers have been learning that people are colonized with billions of microbes, both inside and on the body. And studies have shown that these colonies are unique to the individual and even to the place on the body.'

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