CStanford
Cook
Remove ALL the dishes from the sink. Place them in a plastic bag. CLEAN, first use something like Comet and really scrub everything down. You wouldn't cook with a dirty pan, so you shouldn't clean dishes in a dirty sink.
Then, I'd fill the sink with water and a half cup of bleach. Use the bleach water to wipe down the sink, counters, faucet handles, refrigerator door/handles, anything they may have touched.
Wash the bleach around the sink as well.
Empty the sink, and fill with clean hot water and rinse everything off. Use paper towels or a very clean kitchen towel to wipe everything dry.
That should take care of initial cleaning.
Then, I'd recommend filling the sink with HOT water and maybe a tablespoon of bleach and soak the dishes for an hour.
Afterward, wash as normal, rinse and dry them.
It sounds like a lot of steps, but it should prevent you from getting sick and killing any bacteria.
Maybe others have tips for you, but this is a start.
Good luck!
FF
You would be welcome in any kitchen I'm associated with any time.