Interest of Flow Cytometry for the Diagnosis, the Follow up and Specific Immunotherapy (SIT) Arrest of Hymenoptera Venom Allergy

Inclusion Criteria: * Adult patient (18 - 70 years) * Patient being informed and accepting to participate in the study with signature of informed consent * Patients having a clinical systematic and local, loco-regional story of reaction to the piqures of hymenopterans. * Patients treated by SIT for at least 5 years * Patients benefiting from a national insurance health Exclusion Criteria: * Children * Pregnant woman or who breast-feed * Patient under antihistaminic or corticoid for less than 8 days before the blood drawing * Protected Patient * Patient not having given his agreement after it was informed