Why a teacher should never drink coffee at work

YOU may want to think twice about making that next cup of tea or coffee.

Research has demonstrated that up to 90 per cent of mugs in office kitchens are coated in germs, and 20 percent of those cups actually carry faecal matter.

According to University of Arizona professor of environmental microbiology Dr Charles Gerba, rarely changed communal kitchen sponges are behind spreading bacteria.


Dr. Gerba writes that after wiping cups with a dish cloth or sponge, there was an exponential rise in the presence of coliform bacteria. Similarly, no traces of E.coli were found on cups prior to wipping but 20% of the cups were positive for E.coli after wiping.

Degrading sanitary conditions may be attributed to the presence of potential pathogens in office kitchen and/or coffee preparation area.

The study, “A Microbial Survey of Office Coffee Cups and Effectiveness of an Office Cup Washer for Reduction of Bacteria”, was first published in the journal Dairy, Food and Environmental Sanitation.