A new report has revealed traces of poop can be found in office kitchens.
Office mugs contain traces of poo
A biologist named Dr Charles Gerba has claimed that around 90 per cent of mugs in office kitchens are covered in germs, and up to 20 per cent of the cups carry fecal matter, the News.com.au reports.
Dr Gerba - who is a professor of environmental microbiology at University of Arizona - believes the result is is due to the dirty sponges used to clean the cutlery, which are rarely changed.
He said: ''Coliform bacteria were present of 20 per cent of the coffee cups before and 100 per cent of the coffee cups after wiping with a dish cloth or sponge.
''No E. coli was found on cups prior to wiping. However, 20 per cent of coffee cups were positive for E. coli after wiping.
''The presence of insanitary conditions in office kitchens and/or coffee preparation areas is of concern.''