Does repeated food poisoning have lasting consequences?

I am just getting over some food poisoning (already have a thread on that going, with some great advice from dopers), but now I have a few follow up questions.

  1. Someone told me today that the first time you get food poisoning, it weakens your immune system and makes you more succeptable to getting it again in the future, and that each time you get it your odds of getting it again go up. Sounds like a crock to me – wouldn’t antibodies be built in a fashion akin to vaccination that help you fight it off in the future?

  2. I’ve had about 4 cases of food poisoning in the past – I dunno, maybe 7 years. Any long term effects I need to worry about? I’m in my mid 30’s, healthy overall.

Thanks for any info that will avoid further pain… sigh…

There’s probably more to be said for just the opposite, i.e., that you’d build up resistance to the food poisoning. I remember my first day in Mexico back in 1999. Lettuce at the Pollo Feliz did me in. Badly. Really, really, badly. Next at a café a month or so later, I had some fruit and vegetable platter. It, too, did me in, just not quite as badly. I finally got sick off of something else a third time, and it wasn’t as bad. Now, I feel like I can eat anything (within reason!) in the country.

Depending on the food poisoning agent, the locals probably never would have gotten sick at all.

Just the other day, a coworked got sick (he insists) from a salada at a restaurant. I had the same salad and was fine. But, it was the first salad he’d ever had in-country, so, yeah, maybe it was the salad.