I can understand that one might seek sterile meat after a bad experience, but unless they went CSI on everywhere they were for the time around the incident they

I can understand that one might seek sterile meat after a bad experience, but unless they went CSI on everywhere they were for the time around the incident they cannot know exactly what the source of the poisoning was. It might have been a doorknob at work that was contaminated by someone who didn't wash their hands and had contaminated fecal matter on their hands. Deciding henceforth to only eat sterile meat would not solve that problem.