Food intolerance/allergy

Causes

Appropriate Tests

 

Specific exclusion diets and food challenges are the most reliable diagnostic tests; they should be undertaken only under specialist supervision.

Skin prick allergen test and Allergen specific Immunoglobulin E may be helpful in identifying allergic reactions to foods.

Some tests which are claimed to diagnose food allergy, eg, Vega and cytotoxic food testing, have no scientific validity.

Urticaria

 

Angioedema

 

Anaphylaxis

 

Eczema

 

Diarrhoea, especially

  • Disaccharidase deficiencies

See under Diarrhoea - chronic.

Malabsorption, especially

  • Coeliac disease
  • Allergic gastroenteropathy (eosinophilic enteritis)

Full blood count (Eosinophilia); Albumin; Allergen specific Immunoglobulin E may be helpful.

Small bowel biopsy, if indicated.

References

See also Pathology Decision Support Tool: Food allergy