Food Allergy and Food Intolerance Flashcards
What is the difference between food allergy and food intolerance?
Food allergy involves an immune mechanism
Food intolerance does not involve an immune mechanism
What are the two different types of immune mechanism in allergy and what is the difference between them?
Either IgE mediated or non-IgE mediated
IgE mediated tends to occur early after a food challenge
What kind of foods do adults tend to be allergic to?
Fish
Shellfish
Peanuts
What kind of foods do children tend to be allergic to?
Cows milk
Egg white
Wheat
Soy
Name 5 conditions that can arise due to food allergy?
Acute hypersensitivity Eczema and asthma Rhinitis and asthma Chronic uritcaria Food sensitive enteropathy
Give examples of acute hypersensitivity and also examples of food which could cause this?
Vomiting, diarrhoea, urticaria
Strawberries, shellfish, nuts
Waht immune molecule mediates acute hypersensitivity and why does acute hypersensitivity rarely produce clinical problems?
IgE mediated
Rarely produced problems as patients have already learned to avoid certain suspect foods
What might inadvertant ingestion of suspected food substances which have been known to cause the patient acute hypersensitivity lead to?
Angioneurotic oedema
Which group of patients tend to suffer from eczema and asthma?
What food tends to cause it as a food allergy?
What immune molecule mediates it?
Young children
Eggs
IgE mediated
What foods tend to cause rhinitis and asthma?
What subjects tend to suffer from this?
Milk and chocolate
Atopic subjects
How can chronic urticaria be treated?
Treated successfully by using an exclusion diet
How might food sensitive enteropathy manifest itself and what immune molecule mediates it?
Can manifest as:
Coeliac’s disease
and
Cow’s milk enteropathy
T cell mediated
Give 5 common examples of food intolerance conditions?
Migraine Irritable bowel syndrome Chinese restaurant syndrome Lactose intolerance Phenylketonuria
What foods may trigger migraines?
What do these cause migraines?
What group might be particularly vulnerable to this?
Chocolate, cheese, alcohol
Foods are rich in certain amines, tyramine
Patients who are on monoamine oxidase inhibitors, as these prevent the breakdown of these amines
What causes chinese restaurant syndrome?
What are the symptoms?
Monosodium glutamate - used as a favour enhancer in cooking chinese food
Symptoms: Faintness Dizziness Nausea Sweating Chest pain
