I think it was shrimp from the seafood counter at my grocery store. I did fry it in a pan, though. This was Friday and the only thing I ate besides a bakedpotato, Only my husband and I ate the shrimp. He did not get sick. I seem to be susceptible. I've had food poisoning 5x over the course of my life. But I never had bloody diarrhea. Fortunately I am taking Isotonix Digestive enzymes and that has stopped the diarrhea and vomiting but not yet the back pain.