Diff: Wheat Allergy
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'''Wheat allergy''' is an immune reaction to proteins in wheat. It is a food allergy and is different from coeliac disease and non-coeliac gluten sensitivity. A wheat allergy can cause rapid allergic symptoms and, in some people, anaphylaxis. |
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Wheat allergy is an adverse immune response to proteins found in wheat. It is a common type of food allergy, especially in children, and can cause a range of symptoms varying from mild to severe. Wheat allergy is different from celiac disease, which is an autoimmune disorder triggered by gluten, a protein found in wheat and other grains. Proper diagnosis and management of wheat allergy are crucial to prevent allergic reactions and maintain a healthy diet. |
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Wheat contains several proteins that can trigger allergy. Some reactions happen after eating wheat. Others can happen after inhaling wheat flour, especially in occupational settings such as baking. A separate pattern, wheat-dependent exercise-induced anaphylaxis, occurs when wheat exposure is followed by exercise or another co-factor. |
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== Symptoms == |
== Symptoms == |
Wheat allergy can manifest in various ways, and symptoms may occur within minutes to hours after consuming wheat or wheat-containing products. Common symptoms include: |
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* Skin Reactions: Itchy, red, or swollen skin, hives (urticaria), eczema, or rash. |
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* Gastrointestinal Symptoms: Nausea, vomiting, abdominal pain, bloating, or diarrhea. |
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* Respiratory Issues: Runny or stuffy nose, sneezing, nasal congestion, coughing, wheezing, or difficulty breathing. |
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* Oral Allergy Syndrome: Itchy or swollen lips, mouth, or throat. |
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* Anaphylaxis: A severe, life-threatening allergic reaction characterized by swelling, difficulty breathing, low blood pressure, rapid pulse, and potentially loss of consciousness. |
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Immediate reactions can include hives, itching, swelling of the lips or face, vomiting, abdominal pain, diarrhoea, runny nose, wheeze, cough, throat tightness, dizziness or collapse. |
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== Causes and Triggers == |
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Wheat allergy is caused by an immune response to specific proteins found in wheat. The exact proteins involved can vary among individuals. The following proteins are commonly associated with wheat allergy: |
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Delayed reactions can occur in some people, especially children, and may involve eczema or digestive symptoms. Severe symptoms such as breathing difficulty, throat swelling, faintness or collapse should be treated as possible anaphylaxis. |
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* Albumin: A water-soluble protein found in wheat. |
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* Globulin: A protein responsible for gluten formation in wheat. |
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* Gliadin: A component of gluten that triggers an immune response in individuals with celiac disease. |
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== Difference from Coeliac Disease and Gluten Sensitivity == |
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Coeliac disease is an autoimmune condition triggered by gluten. Non-coeliac gluten sensitivity is a diagnosis considered after coeliac disease and wheat allergy have been excluded. Wheat allergy is an allergy to wheat proteins and is diagnosed and managed differently. |
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The immune system recognizes these proteins as harmful, triggering an allergic reaction. The triggers for wheat allergy can include consuming wheat-based products, inhaling wheat flour, or even skin contact with wheat. |
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This distinction matters for labels and diets. Gluten-free is not always the same as wheat-free, so people with wheat allergy still need to check allergen labelling carefully. |
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== Diagnosis == |
== Diagnosis == |
Diagnosing wheat allergy involves a combination of medical history, physical examination, and specific tests. A healthcare professional may perform the following: |
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* Detailed Medical History: Gathering information about symptoms, timing of reactions, and potential triggers. |
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* Physical Examination: Assessing the physical signs associated with wheat allergy. |
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* Skin Prick Test: Small amounts of wheat protein extracts are placed on the skin, and the skin is pricked to observe any allergic reactions. |
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* Blood Tests: Measuring the presence of wheat-specific antibodies (IgE) in the blood. |
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Diagnosis is based on the reaction history and may include skin prick testing, blood tests for wheat-specific IgE and, where safe and appropriate, a supervised food challenge. Testing should be interpreted by a clinician because positive tests can show sensitisation without proving that wheat causes symptoms. |
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Elimination diets or food challenges may also be conducted under medical supervision to confirm the diagnosis. |
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People should not remove major foods from a child's diet long term without advice, because unnecessary restriction can affect nutrition and make diagnosis harder. |
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== Management and Treatment == |
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The primary treatment for wheat allergy is strict avoidance of wheat and wheat-containing products. This requires careful reading of ingredient labels, as wheat can be found in a variety of foods and products. Common sources of hidden wheat include bread, pasta, cereal, baked goods, sauces, soups, and processed foods. |
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== Management == |
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Management usually means avoiding wheat and having a written allergy plan. People need to check ingredients, catering information and cross-contamination risk. In the UK, wheat is one of the allergens that must be declared when used as an ingredient. |
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For individuals with severe wheat allergy or a history of anaphylaxis, carrying an epinephrine auto-injector (such as an EpiPen) is recommended. In case of accidental exposure and a severe allergic reaction, epinephrine should be administered immediately, followed by seeking emergency medical assistance. |
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Mild reactions may be treated with antihistamines if that is in the person's care plan. People at risk of anaphylaxis may be prescribed adrenaline auto-injectors and should know when and how to use them. |
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== Cross-Reactivity and Coexistence with Other Allergies == |
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Cross-reactivity may occur between wheat and other grains, such as barley, rye, and, to some extent, oats. Some individuals with wheat allergy may also be allergic to these grains due to shared protein components. |
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== Anaphylaxis == |
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Anaphylaxis can develop quickly. Signs include airway swelling, breathing difficulty, wheeze, collapse, severe dizziness, confusion or symptoms affecting more than one body system. |
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Wheat allergy can coexist with other food allergies, such as allergies to milk, eggs, soy, or peanuts. It is important to identify and manage all relevant allergies to ensure a safe and healthy diet. |
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If anaphylaxis is suspected, adrenaline should be used promptly if available and emergency help should be called. The person should usually lie down with legs raised unless breathing makes that difficult. |
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== See Also == |
== See Also == |
* [[Food_Allergies]] |
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* [[Anaphylaxis]] |
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* [[Coeliac_Disease]] |
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* [[Gluten_Sensitivity]] |
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* [[Food_Intolerances]] |
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* [[Gluten Sensitivity]] - A condition characterized by an adverse reaction to gluten without the presence of celiac disease or wheat allergy. |
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* [[Celiac Disease]] - An autoimmune disorder triggered by gluten ingestion, causing damage to the small intestine. |
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== References == |
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* [https://allergynorthwest.nhs.uk/resources/allergy-leaflets/wheat-allergy/ Allergy North West NHS: Wheat allergy] |
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* [https://www.nhs.uk/conditions/food-allergy/ NHS: Food allergy] |
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* [https://www.food.gov.uk/safety-hygiene/food-allergy-and-intolerance Food Standards Agency: Food allergy and intolerance] |
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* [https://www.anaphylaxis.org.uk/fact-sheet/wheat-allergy/ Anaphylaxis UK: Wheat allergy] |
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* [https://www.nhsinform.scot/illnesses-and-conditions/immune-system/anaphylaxis/ NHS inform: Anaphylaxis] |
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[[Category:Medicine]] |
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[[Category:Allergy]] |
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[[Category:Food]] |