This is pretty scary:

It’s a dirty little secret of food poisoning: E. coli and certain other foodborne illnesses can sometimes trigger serious health problems months or years after patients survived that initial bout. Scientists only now are unraveling a legacy that has largely gone unnoticed.
What they’ve spotted so far is troubling. In interviews with The Associated Press, they described high blood pressure, kidney damage, even full kidney failure striking 10 to 20 years later in people who survived severe E. coli infection as children, arthritis after a bout of salmonella or shigella, and a mysterious paralysis that can attack people who just had mild symptoms of campylobacter.

[…]
These late effects are believed to make up a very small fraction of the nation’s 76 million annual food poisonings, although no one knows just how many people are at risk. A bigger question is what other illnesses have yet to be scientifically linked to food poisoning.
[…]
Consider Alyssa Chrobuck of Seattle, who at age 5 was hospitalized as part of the Jack-in-the-Box hamburger outbreak that 15 years ago this month made a deadly E. coli strain notorious.
She’s now a successful college student but ticks off a list of health problems unusual for a 20-year-old: High blood pressure, recurring hospitalizations for colon inflammation, a hiatal hernia, thyroid removal, endometriosis.
“I can’t eat fatty foods. I can’t eat things that are fried, never been able to eat ice cream or milkshakes,” says Chrobuck. “Would I have this many medical problems if I hadn’t had the E. coli? Definitely not. But there’s no way to tie it definitely back.”

(via)