OMG thank you, I have tried to point this out to folks down here many times, mostly without success. Bacteria are not wafting about in the soil and air of Mexico, just looking for a likely lettuce or peach to settle on. Water, yes, there could be bacteria in the water...hence washing raw vegetables with purified water is a good idea.
As a courtesy to the squeamish, when I have guests (those who live here and those from away), I do wash raw salad vegetables with purified water and Microdyn. God forbid anybody should get sick at my house. Anything I cook~nope, I wash it with water from the faucet and that's that.