[beenBoutIT]

Not unless you go out of your way to avoid touching everything. The act of washing with soap and water removes your personal fecal bacteria and turning off the water replaces it with whatever filth is on the knobs. Ditto if you touch the door knob/handle on the way out.

[javagram]

Use a paper towel on the door knob to avoid infection.

Most public bathrooms have automatic taps now that I see.

[myhf]

Most public bathrooms also have automatic doors (if you wait long enough)