Use

This test is useful for establishing a diagnosis of an allergy to ampicillin and defining the allergen responsible for eliciting signs and symptoms. It can identify allergens responsible for allergic responses and/or anaphylactic episodes, confirm sensitization prior to beginning immunotherapy, and investigate the specificity of allergic reactions to insect venom allergens, drugs, or chemical allergens. Testing for IgE antibodies is not useful in patients previously treated with immunotherapy to determine if residual clinical sensitivity exists or in patients where medical management does not depend on identifying allergen specificity.