What is scombroid poisoning?
Scombroid poisoning is a type of food intoxication caused by the consumption of scombroid and scombroid-like marine fish species that have begun to spoil with the growth of particular types of food bacteria. Fish most commonly involved are members of the Scombridae family (tunas and mackerels), and a few non-scombroid relatives (bluefish, dolphin or mahi-mahi, and amberjacks). A few additional species have been implicated, but they are of less concern relative to popular fish consumption. The suspect toxin is an elevated level of histamine generated by bacterial degradation of substances in the muscle protein. This natural spoilage process is thought to release additional by-products which potentiate the toxic effect. The potential toxins are not destroyed by freezing, cooking, smoking, curing or canning.