In USA it doesn't often happen at least it didn't to me. In Asia, with everything being so cheap, it's basically guaranteed to happen at some point and yes, it will rock your world if you come from a sterile environment like USA. Mexico has the Montezuma's Revenge stigma associated with their street food and they probably have a word like that for food served here as well.

I think my level of immunity is why my sisters were down for nearly a week adn I would out of the woods in less than 24 hours.

Hydration is key. Electrolytes are widely available for damn near nothing here, probably for exactly this reason.