Lecture 13-food allergy practical Flashcards
Food Allergy
Adverse food reaction
breaks into 2 categories
1)Food allergy (immune medicated)
2)Food intolerance (non immune mediated e.glactose intolerance)
Food allergy (immune mediated) breaks into three categories
-IgE mediated
-Mixed IgE/ Non-IgE-mediated
-Non-IgE-mediated
IgE-mediated
Immediate onset (<60min)
- Allergy
-Anaphylaxis
Mixed IgE/ Non-IgE-mediated
-Atopic dermatitis
-Eosinophilic Oesophagitis
Non-IgE-mediated
-Food protein-induced allergic proctocolitis
-Food Protein-induced Enteropathy
-Food Protein-Induced Enterocolitis syndrome
-Other enteropathy:coeliac disease
Food allergy can occur in ……% of under 1yr olds
10%
Food allergy can occur in ……% of under 5yr olds
4-8%
When is the reponse to immune mediated food allergy
Quick response 1 hrs of ingestion of food
IgE mediated Food allergy can occur in
Childhood and adulthood
symptoms of IgE mediated Food allergy
Hives, swelling, breathing difficults, vomiting, floppy/pale
what is IgE mediated Food allergy associated with
anaphylaxis
What are common foods that cause IgE mediated Food allergy
Peanut, treenuts, milk, eggs, wheat, soy, fish, seafood, sesame, but can be other foods
Diagnosis IgE mediated Food allergy
Diagnosis with clinical symptoms and positive SPT or serum IgE antibody tests
They will number what food allergues they are testing and in what part of the body for adults and children
They will number what food allergies they are testing
The will test it on the forearm for adults and they will do it on the babies back
what will the specialist measure after the prick
The specialist will measure how big the wheel and the raise is of the affected area
when do non-IgE mediated food allergy usually occur
These usually occur within the first year of life and usually resolve in early childhood
what does non-IgE mediated food allergy involve
The immune system
when does non-IgE mediated food allergy react
Delayed reaction 2hrs-24hrs
what does the non-IgE mediated food allergy usually involve
Gastrointestinal system, such as blood/mucus in stools, reflux, diarrhoea/constipation,excessive crying/abdominal pain
diagnosis of non-IgE mediated food allergy
Diagnosis with clinical symptoms and will have negative SPT/serum IgE testing
non-IgE mediated food allergy : Food protein induced allergic protocololitis
Occurs in first year of life. Causes blood/mucus in stools and unsettledness. Infant often thriving. Most common cause are cows milk, and soy
non-IgE mediated food allergy: Food protein-Induced Enteropathy
Inflammation of the small intestine in early infancy. Causes reflux, loose stools, can be mucus/blood in stools, sometimes poor weight gain, unsettledness, possibly bloating and malabsorption. Most common cause is cows milk and soy.
non-IgE mediated food allergy: Food protein-Induced Enterocolitis syndrome
Profuse vomiting around 2-4 hrs after ingestion of food, may go pale/floppy, fatigue and usually starts in early infancy. Most common food triggers are rice, cows milk, soy, oats and beed
Prevention of food Allergy
from 6 months and before 12 months of age, introduce all allergen foods into the infants diet, offer regulary once introduced
