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Germs Fly in Roller-Derby Games, Study Finds
Date:3/13/2013

By Randy Dotinga
HealthDay Reporter

TUESDAY, March 12 (HealthDay News) -- As roller-derby skaters bump and smack one another on the track, a new study finds that they're exchanging more than bruises: These combative women are also swapping countless bacteria that live on their skin.

Researchers who analyzed skin samples were able to distinguish among teams by the bacteria on the skaters' skin, and they could track how the bacteria moved between teams during a bout.

"The thing that was surprising was how different the teams' different bacteria were before they played, and how similar they became afterward," said study author James Meadow, a postdoctoral research associate at the University of Oregon in Eugene.

Germs pass from person to person, from people to things and from people to animals all day long, he said, but it's usually harmless. "We pick them up from the environment, and we give them off to the environment," he said. "This study was a way to find out how that changes when we come into contact with other people."

For the study, published in the March 12 issue of the new journal PeerJ, researchers studied three roller-derby teams competing in a tournament: the Emerald City Roller Girls from Eugene, Ore.; the DC Roller Girls from Washington, D.C.; and the Silicon Valley Roller Girls from San Jose, Calif.

To obtain microbe samples, the researchers swabbed the skaters' upper arms, which are typically exposed before, during and after a game.

Each team's members had very similar bacteria, possibly because their players came from the same geographical places. "If we picked one of the players at random, I could tell you which team she played for," Meadow said.

But the bacterial makeup of the skin on their arms changed after skin-to-skin contact with other skaters. "It was difficult to tell the teams apart. They had mixed a lot of their skin bacteria," Meadow said.

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