How many crews on a nightstop enjoy breakfast from the same buffet service in the hotel? Or share a portion of chips/nachos (etc) in the bar?
Not to mention the peanuts - so named because they've been touched by so many people who didn't wash their hands after using the toilet.
I've, fortunately, only ever had food poisoning twice, once after a Mexican meal in Reading - spent two days in a hotel toilet pointing one end at the toilet and the other at the shower - and a second at work - just made it to the bog and the result looked like explosive decompression