I don't have any medical background at all, but I wonder if you could just consider this a coincidence? Perhaps you already had picked up the illness (stomach bug, sore throat virus), and then just happened to develop the symptoms after you ate those particular things? After all, you have to eat SOMETHING before you get sick from normally contracted illnesses. Maybe the food had nothing to do with your sickness at all, and you would have had the same symptoms even if you had nothing to eat. Just an idea.
Grits
2010 Trek 5.2 Madone WSD, SI Diva Gel Flow
2002 Terry Classic, Terry Liberator