Food Allergies Paediatric Dietetic Department 2014.

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Presentation transcript:

Food Allergies Paediatric Dietetic Department 2014

Aims Of The Session Increase awareness of Common types of food allergy Symptoms of food allergy Practical considerations for management of food allergy in schools

Food Allergy 6-8% of children have a proven food allergy Food allergies occur when the body’s immune system perceives a food protein to be harmful & acts against it As a result of this action, chemicals are released (e.g. histamine) and it is these chemicals which cause symptoms There is no cure for food allergy, complete and strict avoidance of the food is the only way to prevent a reaction NICE guidelines,

Types of Reaction IgE Non-IgE Quick ‘Acute’ onset Anaphylaxis Well-defined mechanism Fairly easy to diagnose Validated tests -Specific serum IgE assays -Skin Prick Tests -+/- supervised Challenges Mild to moderate ‘Delayed’ onset Mechanisms unclear Harder to diagnose No validated tests - Elimination diet with planned challenge NICE Guidelines 2011

Possible Food Allergy Symptoms IgE mediated Symptoms Non IgE mediated symptoms The skin Acute PruritusPruritis Erythema Acute angioedema (most commonly in the lips and face, and around the eyes) Significant atopic eczema Urticaria

Possible Food Allergy Symptoms IgE mediated symptoms Non-IgE mediated symptoms Gastrointestinal system Colicky abdominal painAbdominal discomfort VomitingGastro-oesophageal reflux disease DiarrhoeaLoose or frequent stools, constipation, blood or mucus in stools Food refusal or aversion Perianal redness Faltering growth

Possible Food Allergy Symptoms IgE mediated Symptoms Respiratory System (usually in combination with one or more of the previous symptoms and signs) Upper respiratory tract symptoms (nasal itching, sneezing, rhinorrhoea or congestion [with or without conjunctivitis]) Lower respiratory tract symptoms (cough, chest tightness, wheezing or shortness of breath)

Life Threatening Anaphylaxis Symptoms All of the symptoms of IgE mediated reaction Difficulty breathing Swelling around tongue / throat Redness of skin Collapse →Adrenaline auto injector Note, not all children with a food allergy will experience anaphylactic symptoms

Which foods are involved? For children the most common food allergies are: Cows milk Protein Eggs Peanuts Tree nuts Fish Shellfish

Cow’s Milk Allergy (CMA) Occurs when the body’s immune system reacts to proteins found in milk Up to 7% of children have a CMA and usually presents in infancy Most children will outgrow it (average age 5 years for IgE mediated and majority by age 3 years for uncomplicated non-IgE mediated allergy) BMJ 2013;347:f5424

Cows Milk Containing Foods: Cows milk Butter Yoghurt Cheese Margarine Ice cream Cream Milk powder Breads containing milk such as pancake, wheaten, soda Cakes, buns, biscuits, chocolate Processed foods

Egg Allergy Egg allergy can be: – - mild i.e. can tolerate well cooked egg - severe i.e. can’t tolerate any form of egg ~50% of children with egg allergy can eat well cooked egg e.g. cakes and biscuits Children who are allergic to loosely cooked or raw egg, the reactions are often severe ~50% of children grow out of an egg allergy in about the first 5-7 years of life, but in the rest it is likely to persist

WELL COOKED EGGLOOSELY COOKED EGG RAW EGG Cakes, biscuitsMeringuesFresh mousse Dried egg pastaLemon curdFresh Mayonnaise Prepared meat dishes and sausages containing egg Scrambled, boiled, poached or fried egg Some ice-creams, (especially fresh and deluxe types) and sorbets Egg glaze on pastryQuicheRoyal Icing Gravy granules (if they contain egg) OmeletteHorseradish, tartar sauce Pancakes and scotch pancakes (shop bought) Egg custardSome cheeses Egg in batterRaw egg in cake mix BreadcrumbsInside a Cadbury's cream egg Homemade pancakes

Nut Allergy Unlike milk or egg allergies, children are unlikely to grow out of a nut allergy (about 1 in 5 will grow out of it) Most first allergic reactions take place when child is between 14 months and 2 years old The nut allergy may become less severe with age, but in 20%, it can become worse with time

Peanuts PEANUTS Arachis hypogaeaGroundnuts Beer nutsGoober nut/pea CacahueteMandelonas Chinese nutsMonkey nuts Earthnuts

Tree Nuts TREE NUTS AlmondMacadamia BrazilPecan CashewPistachio HazelnutWalnut

Food Labelling Children with a nut allergy are advised to avoid all nuts including foods which: – -‘may contain traces of nuts’ or – -‘made in a factory which handles nuts’ – unless individual medical/dietetic advice has been given to family

Food Labelling Current allergen labelling rules will be changing on 13 December Many businesses are already starting to make changes to how they label allergens on their products. Under the new rules, allergens will be emphasised on the label.

Other Considerations Trips - careful forward planning Cookery - check ingredients and provide alternatives if necessary Treat days - supply any special snacks or "birthday treats" in a labelled tin No sharing snacks – remind children each to eat their own snack

Other Considerations School meals & Packed lunch – ‘free-from’ status (e.g. milk, eggs and nuts) Activities e.g. arts and crafts - glues, paints, and old food cartons that may include food allergens Cross contamination – take extra care with hand washing especially after lunch/snacks Pets – bird seed, other pet foods

Food Allergy Resources Allergy UK The Anaphylaxis Campaign The British Dietetic Association National Institute of Clinical Excellence, 2011

Thank you for listening! Any questions?