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**Overview**: Allergy Food 2 Panel**Introduction**: The Allergy Food 2 Panel is a diagnostic tool designed to screen for food allergies using serum samples. In India, food sensitization is high in children and adults (up to 19 percent in pediatric cohorts), but confirmed clinical food allergy remains low (0.14-1.2 percent per EuroPrevall and local studies), with milk, egg, wheat, soy, and peanut among the most common triggers. Sensitization often exceeds true allergy due to cross-reactivity, staple diet exposure, and diagnostic challenges in low-SES and rural populations. Presents with urticaria, angioedema, gastrointestinal symptoms, oral itching, or anaphylaxis in severe cases. High morbidity from underdiagnosis of true reactions, unnecessary dietary restrictions leading to nutritional deficiencies, or delayed management in resource-limited settings. 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 food-related allergic conditions. This diagnostic falls under allergy screening and targets individuals with suspected food allergies, addressing accurate detection to guide safe dietary advice and prevent unwarranted eliminations. With morbidity elevated due to underdiagnosis or misinterpretation of sensitization, the test supports public health efforts by enabling precise identification, facilitating management, and reducing complications such as malnutrition or anaphylactic risk. Its serum-based approach ensures reliable detection in India's diverse dietary and laboratory environments.**Other Names**: Food Pnl 2.**FDA Status**: FDA approved, CLIA certified for immunology, compliant with 2025 standards.**Historical Milestone**: Expanded with specific IgE testing; in India, relevance with common food allergens in daily diet.**Purpose**: The test screens for 6 parameters including milk IgE to guide food allergy assessment, identify specific triggers, and inform management strategies.**Test Parameters**: 1. Total IgE, 2. Milk IgE, 3. Egg White IgE, 4. Wheat IgE, 5. Soy IgE, 6. Peanut IgE.**Pretest Condition**: No fasting required; patients should report skin, gastrointestinal, or respiratory symptoms after consuming milk, egg, wheat, soy, or peanut.**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 food intake, frequency of reactions, dietary habits, family history of food allergy, or previous anaphylaxis.**Consent**: Written informed consent is required, detailing the test's purpose, potential risks of untreated food allergies including anaphylaxis or nutritional issues, 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 from frequent dietary exposure can affect results. Correlation with clinical evaluation or additional testing is recommended to confirm findings.**Clinical Significance**: Abnormal results indicate possible food sensitization, necessitating further investigation like specialist consultation or additional testing. Normal results may require follow-up if symptoms persist.**Specialist Consultation**: Allergists or pediatricians should be consulted for case management, dietary planning, and coordination with nutrition programs.**Additional Supporting Tests**: Oral food challenge or elimination diet trial 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**: EuroPrevall India Study 2023, Indian Journal of Allergy Asthma Immunology 2024. |
