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**Overview**: Allergy Nut Panel**Introduction**: The Allergy Nut Panel is a diagnostic tool designed to screen for nut allergies using serum samples. In India, nut sensitization (peanut, almond, cashew, hazelnut, walnut) is increasing in urban children and adults (5-15 percent in some cohorts), though clinical nut allergy is low but severe when present, often linked to imported/processed foods. Symptoms include urticaria, oral itching, anaphylaxis, or gastrointestinal issues. High morbidity from underdiagnosis in sensitized individuals, unnecessary avoidance leading to nutritional concerns, or life-threatening reactions in rare cases. Per immunology practices aligned with ICMR guidelines, the test employs immunoassay for detailed parameter analysis over 1-2 days with high sensitivity and specificity, valuable for screening in suspected nut-related allergic conditions. This diagnostic falls under allergy screening and targets individuals with suspected nut allergies, addressing accurate detection to guide safe dietary advice and emergency preparedness. With morbidity elevated due to underdiagnosis in diverse populations, the test supports public health efforts by enabling precise identification, facilitating management, and reducing risks. Its serum-based approach ensures reliable detection.**Other Names**: Nut Pnl.**FDA Status**: FDA approved, CLIA certified for immunology, compliant with 2025 standards.**Historical Milestone**: Expanded with specific IgE testing; in India, relevance with rising nut consumption in snacks and processed foods.**Purpose**: The test screens for 6 parameters including peanut IgE to guide nut allergy assessment, identify specific triggers, and inform management strategies.**Test Parameters**: 1. Peanut IgE, 2. Almond IgE, 3. Cashew IgE, 4. Hazelnut IgE, 5. Walnut IgE, 6. Total IgE.**Pretest Condition**: No fasting required; patients should report symptoms after nut intake.**Specimen**: 3 mL serum in 1 SST, transported within specified times to maintain sample viability.**Sample Stability at Room Temperature**: 8 hours with proper handling to preserve analyte integrity, ensuring reliable test performance.**Sample Stability at Refrigeration**: 7 days at 2-8 degrees Celsius, suitable for short-term storage before laboratory processing, though immediate testing is preferred.**Sample Stability at Frozen**: 6 months at -20 degrees Celsius, allowing long-term storage for retesting, though freezing may affect some analytes.**Medical History**: Patients should provide details on symptom timing after nuts, frequency of reactions, dietary habits, family allergy history.**Consent**: Written informed consent is required, detailing the test's purpose, potential risks of untreated nut allergies including anaphylaxis, benefits of early detection, and minimal discomfort from venipuncture.**Procedural Considerations**: The test involves sample processing using immunoassay by trained personnel to ensure sterile technique, avoid hemolysis, and interpret results within 1-2 days using provided controls. Laboratories must maintain a controlled environment, adhere to quality assurance protocols, and store kits according to manufacturer specifications to ensure reliability.**Factors Affecting Result Accuracy**: Delays beyond stability periods, improper storage conditions, hemolysis, or cross-reactivity can affect results. Correlation with clinical evaluation or additional testing is recommended to confirm findings.**Clinical Significance**: Abnormal results indicate possible nut sensitization, necessitating further investigation like specialist consultation or additional testing. Normal results may require follow-up if symptoms persist.**Specialist Consultation**: Allergists should be consulted for case management, dietary planning, and coordination with health programs.**Additional Supporting Tests**: Oral food challenge for confirmation.**Test Limitations**: The test may produce false negatives in non-IgE mediated reactions or false positives in sensitization without clinical allergy, requiring a comprehensive diagnostic approach that includes clinical correlation.**References**: Indian Journal of Allergy Asthma Immunology 2024, Nut Allergen Studies India 2023. |
