I got an intestinal parasite (Ascaris -https://www.cdc.gov/parasites/ascariasis/index.html) while in University here in Canada. I was minding my business one day, I looked down into the toilet water, and there was a little wormy in my stool. I fished it out and went the ER. The doctor was fascinated cause I don't think they see this so often.

Who knows where I picked it up. The most likely culprit was the dorm cafeteria I was living in. With the open salad bars and the sharing of serving utensils, it is an ideal location to spread some fecal.

Suffice to say, I now avoid salad bars.