Can free samples make you sick?

Image by iirraa via Flickr

After reading my previous post on free samples at Whole Foods Market in Paramus, a friend sent me an e-mail:

"Meaning to tell you, some weeks ago I stopped at Jerry's and had lots of samples, including bread in balsamic vinegar. I think that's what made me sick that night. Those little bowls of vinegar and oil must be bacteria hives."

Interesting. I have never had a problem after eating free samples at Jerry's in Englewood or any other store, or never linked how I felt to those samples or the possibility of bacteria. Jerry's is well-patronized and the samples go fast -- especially around lunch time. 

Neither balsamic vinegar nor olive oil require refrigeration. Would bacteria grow from their exposure to air?

Jerry's puts out a lot of different cheeses, so I have made it a habit to carry pills for lactose intolerance. I used one at Whole Foods yesterday to try an $11.99-a-pound selection.

I'd like to hear about other shoppers' experience with free samples.