Investigation of Cross-allergies Between Cefazolin and Amoxicillin With Skin Tests and Provocation Test

Inclusion Criteria

• •Patient whose age ≥ 18 years,
• •French-speaking patient
• •Patient who had an allergic reaction to a beta-lactam infusion as well as the patient who developed a severe form of anaphylaxis
• •Proven drug allergy by skin test to a beta-lactam of the penicillin or cephalosporin type in immediate reading or rereading of prick test, intradermal reaction (IDR) or patch test.
• •Patients managed in consultation with the allergology department of GHPSJ for exploration of their drug allergy since 01/01/2019.