Although cicadas and many other insects are not just edible but highly nutritious, it is important to note that people who have a known shellfish allergy, particularly to Crustaceans (shrimp, crabs, lobsters, etc.) could potentially have an allergic reaction to eating cicadas as well. This is not necessarily true for everyone, but it is important to know before you dine!
The allergic reaction in sensitized people is due to two factors that insects share with crustaceans: 1) the chitin used to form insect exoskeletons is very similar to the chitin used in the exoskeletons of many Crustacea; and 2) insects as well as Crustacea both include the proteins tropomyosin and arginine kinase, which are both known for invoking an allergic reaction in those with shellfish allergies. Tropomyosin is a structural element in muscle tissue and arginine kinase is an enzyme involved in muscle contraction. #BroodX #Magicicada