Task: Answer Verification
Input (English): Question: Does the specificity of tests for anti-beta-lactam IgE antibodies decline progressively with increase of total serum IgE?
Answer: Before 2006, tests for anti-beta-lactam IgE antibody in patients with total IgE > 500 kU/l were probably often false positive. Patients who were diagnosed as penicillin allergic before 2006 solely on the basis of a positive CAP FEIA test for specific IgE should be considered for diagnostic reevaluation.
Output (English): yes