NAHHH!!! You run your family toothbrushes and your kitchen sponges through the dishwasher, separately of course if you are really "Monk" ee ! One hundred and forty degree water ought to do the trick! Although when small ones are sick, I do boil the teakettle and pour it over the brush! Get rid of those gross cups that everyone's saliva drips into after brushing and you'll be a happy Camper!
Did I say Paranoid?
I can promise you my toothbrush never sits out in a gross shared cup, or anywhere else anyone could ever have access to it.
It's put away far from any possibility of contamination by others!
Just remembering that Seinfeld episode in which one of his girlfriends dipped his toothbrush in the toilet...