By

Michelle Castillo /

CBS News/ May 23, 2012, 12:19 PM

Where do germs flourish in your office? Study reveals dirtiest surfaces

1. Break room sink faucet handles

AP Photo
By far, the dirtiest place in the office was the sink faucet found in the break room. Seventy-five percent of them had "officially dirty" readings, while 91 percent of them could be cleaner.

"The break room is really the center of germ transfer in the office rather than the individual cubicle," Gerba told MSNBC. "Everything is shared in the break room."

He pointed out that the sponge that many employees use to clean their mug may be loaded with E.coli. "So you're really wiping your mug with E. coli," he said.