ALLERGY, CASHEWNUT (KAJU)

The Allergy, Cashewnut (Kaju) Test is a specialized blood test that measures specific Immunoglobulin E (IgE) antibodies against proteins found in cashew nuts (Anacardium occidentale). This test helps identify allergic sensitization to cashew nuts and supports the diagnosis of tree nut allergy, food hypersensitivity, and IgE-mediated allergic reactions.

Cashew nuts, commonly known as Kaju, are widely used in snacks, sweets, desserts, chocolates, bakery products, curries, and processed foods. In susceptible individuals, proteins present in cashew nuts can trigger an abnormal immune response, resulting in the production of specific IgE antibodies. Upon repeated exposure, histamine and inflammatory mediators are released, leading to allergic symptoms.

Cashew nut allergy is one of the most common and potentially severe tree nut allergies. Even small amounts of exposure can cause significant reactions, including life-threatening anaphylaxis in highly sensitive individuals. Cross-reactivity with pistachios and other tree nuts is also common.

The Cashewnut (Kaju) Allergy Test helps healthcare providers determine whether cashew nuts are responsible for allergic symptoms and assists in developing dietary precautions and allergy management plans.

Benefits of the Test

• Detects cashew-specific IgE antibodies
• Helps diagnose tree nut allergy
• Supports evaluation of food hypersensitivity
• Assists in identifying dietary triggers
• Helps prevent severe allergic reactions
• Requires only a blood sample
• Supports personalized dietary management

Why Doctors Recommend This Test

Doctors may recommend this test for:

• Skin rash or hives after eating cashew nuts
• Lip, tongue, or facial swelling
• Itching of the mouth or throat
• Abdominal pain, nausea, vomiting, or diarrhea after nut consumption
• Wheezing or breathing difficulty
• History of nut allergies
• Evaluation of severe allergic reactions

Preparation Before Test

Sample Required

• Peripheral venous blood sample

Preparation Guidelines

• No fasting is required
• Antihistamines generally do not interfere with blood IgE testing
• Inform your physician about previous allergic reactions and food history
• Follow laboratory instructions before sample collection

Reporting Time

Results are generally available within 3–7 working days, depending on laboratory methodology.

Who Should Take This Test?

• Individuals experiencing symptoms after consuming cashew nuts
• Patients with suspected tree nut allergy
• Children and adults with food allergies
• Individuals with recurrent allergic reactions
• Patients undergoing allergy evaluation

Clinical Significance

Elevated cashew-specific IgE levels may indicate:

• Cashew Nut Allergy
• Tree Nut Allergy
• Food Hypersensitivity
• IgE-Mediated Food Allergy

Symptoms may include:

• Mouth or throat itching
• Hives and skin rash
• Swelling of lips, tongue, or face
• Abdominal pain
• Nausea and vomiting
• Diarrhea
• Wheezing
• Shortness of breath
• Severe allergic reactions including anaphylaxis

The presence of cashew-specific IgE antibodies indicates sensitization and should always be interpreted together with clinical symptoms and dietary history.