Intradermal allergen

Specimen:

In vivo procedure which should only be performed by an experienced practitioner.

Method:

Intradermal injection of standardized allergen solutions.

Reference Interval:

Reaction diameter 3 mm greater than control.

Application:

Role in testing for IgE-mediated drug allergy (esp penicillin) and stinging insect allergy. Only occasionally used with other allergen extracts.

Interpretation:

Should be interpreted in association with clinical history. Should always be preceded by skin prick testing and performed only if skin prick testing is negative.

Reference:

Walls R. Allergies and their management. 1997. Maclennan and Petty.