Strawberry Allergy Blood Test

What this test measures

Strawberry is a fruit in the rose family, and some of its proteins resemble pollen allergens. That similarity can cause oral allergy syndrome, where raw fruit causes tingling or itching in the mouth because the immune system mistakes fruit proteins for pollen. A blood test helps sort out whether symptoms reflect a genuine strawberry allergy or this cross-reactive pattern.

The test measures allergen-specific IgE in serum using a laboratory immunoassay. IgE is the antibody class involved in immediate allergic reactions. The report gives a quantitative level and typically a reactivity class for strawberry. An elevated value indicates that the immune system has made antibodies against strawberry proteins, but the level alone does not predict how severe a reaction would be.

People with a suspected food allergy, persistent oral symptoms after eating fruit, or reactions of unclear cause may be offered this test. It is often ordered with other fruit and pollen tests to reveal cross-reactivity patterns. Results are meant to support, not replace, a clinician's assessment, and anyone with a history of severe reactions should seek medical guidance before testing.

• Strawberry-specific IgE antibodies
• Strawberry allergen component Fra a 1 (PR-10)
• Strawberry allergen component Fra a 3 (lipid transfer protein)
• Quantitative allergen-specific IgE level
• IgE reactivity class for strawberry
• Total serum IgE
• Cross-reactive Rosaceae fruit allergens
• Related pollen allergen components

Why people order this test

• Investigate itching, hives, or swelling after eating strawberries
• Clarify symptoms that resemble oral allergy syndrome
• Support a broader food allergy evaluation
• Check for cross-reactivity with birch or other pollen allergens
• Provide objective information before discussing avoidance with a provider
• Follow up on a reaction of unclear cause

How to prepare

No fasting is required. A blood sample is drawn from a vein, usually at the arm. Follow any timing or medication instructions provided by the laboratory.

Understanding your results

Results are generally available within one to three business days. The report shows the specific IgE level and a reactivity class for strawberry. An elevated result suggests sensitization, and a qualified healthcare provider interprets it with the person's symptoms.