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Scombroid poisoning: mini-review with case histories
Summary
Scombroid poisoning, a common fish poisoning often mistaken for Salmonella infection, results from eating spoiled fish high in histamine. Prompt antihistamine treatment is effective for this self-limiting condition.
Area of Science:
- Food Safety
- Toxicology
- Microbiology
Background:
- Scombroid poisoning is a global health issue, frequently misdiagnosed as bacterial infections.
- It is a significant cause of fish-related foodborne illness worldwide.
Observation:
- The condition arises from consuming fish, particularly mackerel-like species, contaminated by bacterial action.
- Bacterial activity converts histidine to histamine, potentiated by diamines, especially when fish are improperly stored above 20°C.
- Commonly implicated bacteria include Proteus, Clostridium, Escherichia, Salmonella, and Shigella species.
Findings:
- Twenty-five cases revealed consistent clinical signs: taste alterations, anxiety, facial/neck hyperemia, nausea, pruritus, and headache.
- Most patients experienced symptom relief with antihistamine medication.
- All reported cases were self-limiting, resolving without long-term complications.
Implications:
- Accurate diagnosis of scombroid poisoning is crucial to differentiate it from other foodborne illnesses.
- Proper fish storage protocols are essential to prevent bacterial growth and histamine formation.
- Antihistamines provide effective symptomatic relief for scombroid poisoning patients.
