My wife ate the entire fruit cup from the street vendor so she must have a stronger stomach than me. Meanwhile just TWO small pieces of that fruit immediately set off a chemical reaction in my stomach so violent that I could hear my stomach loudly growling. At that point I could feel the countdown of impending eruption. After I hit the bathroom of the Portuguese official, either the director of their Museum of Modern Art or somebody just below that, I was fine for the rest of the trip.
Most likely the snow cone syrup was sitting in the heat for days, maybe weeks, so yeah, that could definitely give you hepatitis.
How fortunate you literally “got it out of your system” that one time! Saved your trip.
My experience in Portugal was on the coast in the Algarve with my daughter. We had a wonderful time. Can’t wait to hear your experiences.