Lab test

Lobster Allergy Test - Shellfish Allergy

A lobster allergy test uses a blood sample to measure allergen-specific IgE antibodies against lobster proteins.

Typical price

From $49

Results

1-3 business days

Preparation

See preparation notes below

Sample

Blood draw or sample collection at a local center

A lobster allergy test uses a blood sample to measure allergen-specific IgE antibodies against lobster proteins. Lobster is a crustacean shellfish, a group that also includes shrimp, crab, and crayfish. Shellfish allergy is often linked to a muscle protein called tropomyosin that is shared across these species, so reactions may overlap. The test is a screening tool for suspected shellfish allergy, not a diagnosis on its own. A provider may order it after a reaction to lobster or as part of a broader shellfish panel.

• Lobster-specific IgE Antibodies produced against lobster proteins; used to assess sensitization to lobster.

• People who develop hives, itching, or swelling after eating lobster
• Individuals with tingling or itching in the mouth after shellfish
• Those with digestive upset, vomiting, or diarrhea after shellfish
• People with eczema or skin reactions who suspect a shellfish trigger
• Anyone who has reacted to related crustaceans such as shrimp or crab

• No fasting is required for this IgE allergy test
• The blood sample can be collected at any time of day
• Tell the provider about all medications you take
• No special diet is needed beforehand

Results are reported as an IgE level or class for lobster. An elevated value may indicate sensitization, but sensitization does not always mean a person will react when eating lobster. A low or undetectable level makes a true lobster allergy less likely, though it does not rule out allergy to other shellfish. Because crustaceans share the tropomyosin protein, a provider may consider cross-reactivity with shrimp, crab, or crayfish. Discuss all results with a healthcare provider before changing your diet.

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