Serum tryptase levels in patients with unexplained anaphylaxis
Serum tryptase levels were done on the patients in whom specific IgE to any food could not be identified by SPT and were negative for all the allergens included in ISAC immunocap, due to limited funding. Accordingly, serum tryptase was done in 11/65 (16.9%) patients, who all had levels within the normal range (<11µg/l).