Is our environment really filled with that much bacteria?

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When I was a kid, my parents told me that everyday items are always filled with bacteria, such as banknotes, tabletops, keyboards, smartphones, floor (pick up your fallen food within 5 seconds or it will be infected with bacteria), I grew up told there are millions of bacteria under the fingernails all the time, is this really true? How can they be always there and survive that long if they are on the floor, banknotes etc.? They are living organisms, need to eat something, right? For my thinking there is nothing to eat on the banknotes normally. Can anyone bust this myth or confirm? Thanks in advance.

In: Biology

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Anonymous 0 Comments

IIRC a University did a study on the five second rule and reached two conclusions. 1) The rule doesn’t work. If the food lands in bacteria then it’s basically instant. 2) The University’s floors were clean enough to eat off of. [Found it: University of Illinois, 2003]

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