A Parent's Guide to Allergy Testing: What Can Be Tested?

Last updated
April 15, 2025

When you suspect an allergy might be affecting your child, knowing exactly what's triggering the reaction is crucial for effective management. As a parent, navigating the world of allergies can feel overwhelming. This guide is designed specifically for parents and will walk you through the full spectrum of allergens that can be tested for at LACK Allergy Clinic, providing the clarity you need to help your child navigate allergic conditions with confidence.

Understanding Allergy Testing

Modern allergy testing allows us to identify specific substances causing your child's allergic reactions with remarkable precision. Rather than making educated guesses based solely on symptoms or putting your child through extensive elimination diets, proper testing can pinpoint exact triggers. This helps you avoid unnecessary dietary restrictions or lifestyle changes while effectively managing your child's genuine allergies.

Food Allergens

Food allergies affect approximately 8% of children and 2–3% of adults. Our testing capabilities cover all major food allergens, including:

Common Food Allergens

     
  • Milk and dairy products: Whole milk, casein, whey proteins
  • Eggs: Both egg white and egg yolk proteins
  • Peanuts: Including specific peanut component proteins
  • Tree nuts: Almonds, Brazil nuts, cashews, hazelnuts, macadamias, pecans, pistachios, walnuts
  • Fish: Cod, salmon, tuna, and other common species
  • Shellfish: Shrimp, crab, lobster, oysters, scallops, mussels
  • Wheat: Various wheat proteins including gluten components
  • Soy: Soybeans and soy products
  • Sesame seeds: Increasingly recognised as a significant allergen

Less Common Food Allergens

     
  • Other grains: Barley, rye, oats, corn, rice
  • Legumes: Lentils, chickpeas, beans, peas
  • Fruits: Apples, peaches, kiwi, strawberries, bananas, avocados
  • Vegetables: Celery, carrots, bell peppers, tomatoes
  • Seeds: Sunflower, pumpkin, poppy, mustard seeds
  • Spices: Mustard, coriander, caraway, garlic, onion
  • Meats: Beef, chicken, pork (rare but possible)

Component Resolved Diagnostics

For certain food allergies, particularly peanut and tree nut allergies, we offer advanced component resolved diagnostics (CRD) testing. This sophisticated approach identifies antibodies to specific protein components within an allergen, helping to distinguish between:

     
  • Allergies likely to cause severe reactions
  • Allergies typically causing milder symptoms
  • Cross-reactions from related allergens (such as pollen-food syndrome)

This detailed information helps us provide more precise risk assessments and management strategies.

Environmental Allergens

Environmental allergies (also called respiratory or inhalant allergies) affect a significant portion of the population, with symptoms ranging from mild seasonal discomfort to severe year-round symptoms. Our testing covers:

Pollen Allergens

     
  • Tree pollens: Birch, alder, hazel, oak, plane, ash
  • Grass pollens: Timothy, rye, meadow, bermuda, orchard
  • Weed pollens: Ragweed, mugwort, plantain, nettle

Indoor Allergens

     
  • House dust mites: Dermatophagoides pteronyssinus and Dermatophagoides farinae
  • Pet allergens: Cat, dog, horse, rabbit, guinea pig, hamster, mouse
  • Moulds: Alternaria, Aspergillus, Cladosporium, Penicillium
  • Insects: Cockroach, storage mites

Other Environmental Substances

     
  • Latex: Natural rubber latex proteins
  • Occupational allergens: Various workplace substances depending on specific exposure

Medication and Drug Allergies

Adverse reactions to medications can be complex, involving both allergic and non-allergic mechanisms. When a true allergic reaction is suspected, we can test for:

     
  • Antibiotics: Penicillins, cephalosporins, sulfonamides
  • Anaesthetics: Local and general anaesthetic agents
  • Non-steroidal anti-inflammatory drugs (NSAIDs): In selected cases
  • Other medications: Based on specific patient history and needs

Note: Medication allergy testing often involves specialised approaches and may require referral to dedicated drug allergy centres for comprehensive evaluation in complex cases.

Venom Allergens

For patients who have experienced severe reactions to insect stings, we offer testing for:

     
  • Honey bee venom
  • Wasp venom
  • Yellow jacket venom
  • Hornet venom

Accurate identification of venom allergies is crucial for risk assessment and consideration of venom immunotherapy, which can be life-saving for those with severe reactions.

How We Determine Which Allergens to Test

Not every patient needs testing for all possible allergens. Our approach is thoughtfully tailored to each individual, considering:

     
  • Medical history: We carefully review your or your child's symptom patterns, timing of reactions, and suspected triggers.
  • Age-specific considerations: Certain allergies are more common in specific age groups, informing our testing strategy.
  • Clinical presentation: Different allergic conditions (such as eczema, asthma, hay fever, or food allergies) suggest different potential triggers.
  • Geographic relevance: We focus on allergens prevalent in your local environment rather than those rarely encountered
  • Seasonal patterns: When symptoms show clear seasonal variation, we target testing to relevant seasonal allergens.

This targeted approach ensures that testing is relevant to your specific situation, avoiding unnecessary procedures while providing comprehensive assessment of likely triggers.

Testing Methods

At LACK Allergy Clinic, we employ multiple testing techniques to accurately identify allergens:

  • Skin prick testing: Quick, minimally invasive tests that provide immediate results for a wide range of allergens. A small amount of allergen extract is placed on the skin, and the skin is pricked to allow the substance to enter. Positive reactions typically appear within 15–20 minutes.
  • Specific IgE blood testing: Blood tests measuring antibodies to specific allergens, particularly useful when skin testing isn't feasible due to skin conditions, medication use, or age-related considerations.
  • Component resolved diagnostics: Advanced blood testing identifying antibodies to specific molecular components within allergens, providing more detailed information about allergy patterns.
  • Oral food challenges: Gold standard for diagnosing food allergies, involving carefully supervised consumption of the suspected food allergen in gradually increasing amounts to confirm or rule out allergy.

Test Interpretation: The Expertise Factor

Perhaps the most important aspect of allergy testing isn't just which allergens we can test for, but how we interpret the results. At LACK Allergy Clinic, led by Professor Gideon Lack, we recognise that:

  • Positive test results don't always mean clinical allergy
  • Test size doesn't perfectly correlate with reaction severity
  • Patterns of sensitisation provide important diagnostic clues
  • Clinical history must be integrated with test findings

This sophisticated interpretation, combined with our extensive testing capabilities, ensures you receive not just results, but meaningful guidance about your allergic condition.

Looking Ahead: Personalised Testing Approaches

As allergy science advances, testing approaches continue to evolve. Emerging approaches include:

  • Basophil activation testing: Specialised lab testing examining how certain white blood cells respond to allergen exposure.
  • Epitope mapping: Detailed analysis of which specific parts of allergen proteins trigger reactions.
  • Multiplex testing platforms: Testing for many different component allergens simultaneously from a single blood sample.

While some of these approaches remain primarily research tools, they represent the future direction of increasingly personalised allergy diagnostics.

Next Steps

If you suspect allergies are affecting your child, our team at LACK Allergy Clinic can help determine which specific allergens warrant testing based on your child's unique situation. This targeted approach ensures your family receives the most relevant information without putting your child through unnecessary procedures.

By accurately identifying your child's specific allergen triggers, we can develop age-appropriate, personalised management strategies that effectively control symptoms while avoiding needless restrictions. Our goal is to help your child live confidently with allergies while giving you, as a parent, the knowledge and tools you need to support them.

Don't let allergies rule your life, take control today

Whatever your allergy concerns, we’re here to support you and your family every step of the way. Whether you’re looking for answers, seeking treatment, or just want to discuss your symptoms, our team is ready to help.
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