Registered Dietitian Practice Test 2025 – Comprehensive Exam Prep

Question: 1 / 400

What is the primary source of seafood toxins like scombroid?

Environmental pollution.

The fish itself.

The primary source of seafood toxins like scombroid is indeed the fish itself. Scombroid poisoning occurs when fish, especially those belonging to the scombroid family such as tuna and mackerel, are improperly handled or stored after being caught. While the fish may initially be safe to eat, if it is not refrigerated promptly, bacteria can proliferate and convert histidine, an amino acid present in the fish, into histamine. Elevated levels of histamine lead to allergic-like reactions in humans upon consumption.

Understanding the biochemistry behind scombroid poisoning is essential for food safety practices. The specific handling of fish post-catch is crucial in preventing toxin formation and ensuring the fish remains safe for human consumption.

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Improper cooking methods.

Contaminated water sources.

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