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Other than soaking your entire earthly being in bleach for hours you will swab for Fecal Coliform.
FC is used as an indicator of contamination levels not just a Yes/No its dirty assumption.
Humans are gross assemblages with more micro-organisms than we have cells.
What is important is to not have FC levels be high in food or water supplies.

Yes please do wipe down your devices and handles and other things you contact.
Why? Because we are disgusting oozing masses. Spinach anyone?

https://en.wikipedia.org/wiki/Fecal_coliform