I did self-diagnose, and you raise a fair point. Other than on the plane, I was not in close quarters with anyone. And since I have, um, cleansed my stomach of its contents this morning, i am feeling much better.

So, no guarantee I had food poisoning, but if others who had the burger on this flight (sfo - atl, 4/19 at noon) had similar reactions, then delta needs to know about it. If it is an isolated event that just hit me, then so be it.