Overall, the swab results, carried out by Initial Washroom Hygiene, showed that 75 per cent of kitchen work surfaces are home to more bacteria than an average feminine sanitary bin.
Dr Peter Barratt, Technical Manager at Initial Hygiene, said: "Shared office kitchens can be very busy areas with a heavy footfall, making this space a potential hazard for cross-contamination when good hygiene practices and hand washing aren't encouraged.
"As workers prepare their lunches on the kitchen surfaces, it's vital to ensure these surfaces are sanitised on a regular basis and that, as a minimum, towel dispensers, soap, and hand or surface sanitisers are available to mitigate the risks.
"Regular hand washing with soap and water has been proven to reduce the risk of the spreading of pathogens, and will help to ensure the workforce remains fit and healthy."
To conduct the research Initial took 280 samples from 70 kitchen appliances in eight offices.
The news comes just after it was revealed that one sick person can infect half of an office's commonly touched surfaces by lunchtime.
Scientists at the University of Arizona discovered that telephones, desktops, table tops, doorknobs, photocopier and lift buttons, and the office fridges are all rapidly contaminated by an ailing worker.
However the study also revealed that simple interventions, such as hand washing and the use of hand sanitiser or wipes, can drastically reduce employees' risk of infection.
- DAILY MAIL