Navigating Shellfish and Fish Allergies: Causes, Symptoms, Diagnosis and Management

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Types of Seafood Allergies

Shellfish

  • • Crustaceans (shrimp, crab, lobster)
  • • Mollusks (clams, mussels, oysters)
  • • Scallops
  • • Squid/octopus

Fish

  • • Finned fish (salmon, tuna, cod)
  • • White fish (halibut, bass)
  • • Oily fish (mackerel, sardines)
  • • Fresh and canned varieties

Symptoms

Mild to Moderate

  • • Oral itching or tingling
  • • Hives or skin rash
  • • Digestive discomfort
  • • Nasal symptoms

Severe (Anaphylaxis)

  • • Difficulty breathing
  • • Throat tightness
  • • Drop in blood pressure
  • • Loss of consciousness

Diagnosis Methods

Clinical Tests

  • • Skin prick testing
  • • Specific IgE blood tests
  • • Component testing
  • • Oral food challenges

Medical History

  • • Detailed symptom history
  • • Reaction patterns
  • • Family history
  • • Related conditions

Management Strategy

Prevention

  • • Complete avoidance of triggers
  • • Label reading
  • • Cross-contact prevention
  • • Restaurant communication

Emergency Preparedness

  • • Carry epinephrine auto-injectors
  • • Written action plan
  • • Medical ID jewelry
  • • Emergency contact list