I really don't want to eat here anymore......

In a previous life (a few years ago) I worked as a Microbiologist after studying an Applied Biology degree. I had a little bit of a surprise today when some of the students I work with in my new life (as an edukator!) showed me some samples they had taken from our canteen.
Taken in context that these students are not the best trained yet we could assume that these results need to be checked, though it seems our toilets, floors, seats, air, lab benches, skin, etc etc is far cleaner than our canteen cutlery and tables.
I don't eat in the canteen much anyway but I think poisoning our dear students is a little extreme even for the catering staff!

You can have a look for yourself if I can get these plates to scan.......