Jacobi Zakrzewski & Kevin Kelchen

An immune system response where the body mistakes an ingredient in food—usually a protein—as harmful and creates a defense system (antibodies) to fight it.

Eight foods account for 90% of all food-allergic reactions. They are milk, egg, peanut, tree nuts, fish, shellfish, wheat, and soy.

• About 3-5% of adults, 6-8% of children have clinically true food allergies. What others may misinterpret as food allergies may actually be food intolerances, food poisoning, or toxic reactions.

• A food allergy is an abnormal response to a food that is triggered specifically by the immune system.

Food allergies can be triggered by even a tiny amount of the food and occur every time the food is consumed. On the other hand, food intolerances often are dose related.

Cross-reactivity: suffering from allergic reactions to similar foods

• http://www.youtube.com/watch?v=4D9p3dnBSq0

• immunoglobulin E (IgE) is an antibody produced in plasma cells specific for the allergen.

• Depending upon the tissue in which they are released, the released chemicals (“mediators”) cause the various symptoms of food allergy.

-Ears, nose, throat vs. skin vs. GI tract

• Food allergy symptoms usually develop within a few minutes to two hours after eating the offending food.

• Other than what we know about what occurs in the body regarding the immune system, we really don’t know why the body falsely identifies a protein as harmful.

Family history: increased risk if allergies (any kind) are common in family; food allergies often run in families

A past food allergy: outgrown food allergies may return later in life

Other allergies: if allergic to one food, increased risk of being allergic to another. Another type of allergy also increases risk.

• Age: most food allergies begin in the first or second year of life. With age, digestive system matures and body is less likely to absorb food or food components that trigger allergies.

• Tend to outgrow: milk, soy, wheat and egg• Likely lifelong: nuts and shellfish• However, some feel it is possible for

allergies to develop during the fetal stage of development.

• Determine if you have a true food allergy:-Physical exam and history: symptoms began, foods eaten, environmental changes-Skin prick tests: foods placed on forearm or back and skin pricked with needle to verify reaction-RAST (radioallergosorbent) blood tests: test blood for IgE antibodies-Elimination diet: begin limited diet and keep adding new foods one-by-one-Food challenge: various foods in individual capsules; patient and doctor blind-folded; most accurate and risky

Primary treatment and only way to avoid a reaction = strictly avoiding the food!

The Food Allergen Labeling and Consumer Protection Act (FALCPA): law requires food manufacturers to list top food allergens on product labels

• There are no medications that cure or prevent allergic reactions to foods—medications are administered to control symptoms after a reaction occurs.

• Minor reaction: antihistamines may help reduce symptoms (block effect of histamine released by mast cells)

• Severe/anaphylactic reaction: epinephrine (or adrenaline) injection (EpiPen), which shuts down mast cell from releasing chemicals and constricts blood vessels to raise blood pressure of people whose blood pressure is falling from a reaction

Read all food labels, never assume anything

If you are unsure about a food and its ingredients, ask the cook or somebody who knows what ingredients are in it.

Wash your hands before and after eating Let the people around you know what

you’re allergic to Make sure your diagnoses is correct Carry medication with you at all times

Food allergies are common Problem: Unclear accepted definition for them

Many people have food intolerance instead of an allergy Such as lactose intolerance

Misdiagnoses due to cost effectiveness of tests Food challenge costs too much Skin prick testing and blood testing used, causes

overdiagnoses “We tell parents that about half the time a skin prick or blood

test may not be accurate and that patient history, physical examination , and other factors need to be considered,“

http://www.cbsnews.com/stories/2010/05/12/health/webmd/main6476750.shtml

Cooking teacher Oonagh Williams runs a catering business

Realizes the problem of food allergies Her food is free of gluten

Son is allergic to gluten, uses him to taste test recipes

http://www.nashuatelegraph.com /business/759709-192 /food-pros-cater-to -allergy-needs.html?i=1