Be careful. I had a patient come in with severe hives after he ate a bunch of sauteed cicadas back in '04.He cooked them in wine, butter and garlic. He had a shellfish allergy. They had the case on the news. I even submitted it to the medical journals.
Interesting. It would make more sense if he had an allergy to nuts - first, because they spend those 17 years underground sucking on tree roots, and second, because they taste like almonds.
Do they have a lot of iodine in them?
Did you find a link between shellfish allergy and the cicida or was there another factor that may have caused the patient to be alergic. Other allergies? Did the patient have arthritis or family history of arthritis?
I remember reading about that patient, probably here on FR by you?