throughout history, poison was used quite often to assassin many political figures
but as far as food poisoning- working in the culinary industry- it can happen to anyone, especially in food establishments that don't keep up to sanitation standards or just simply the individual(s) handling the person's order wasn't sanitary him or herself
though i could see this happening in the PI, i just think it was dumb luck it happened to bryant in detroit. food establishments are at high risk of lawsuit and potential loss of many customers if news were to surface of a person, a celebrity no less, having a loss suit against that business