Which statement best differentiates scombroid poisoning from shellfish allergy?

Which statement best differentiates scombroid poisoning from shellfish allergy?

• A. Scombroid poisoning is caused by histamine produced in decaying fish; shellfish allergy is IgE-mediated to shellfish proteins
• B. Scombroid poisoning occurs only with canned fish
• C. Shellfish allergy requires prior exposure
• D. Scombroid poisoning is caused by bacterial endotoxins

Answer: (A)