Cross-reactivity and tolerability of aztreonam and cephalosporins in subjects with a T cell–mediated hypersensitivity to penicillins  Antonino Romano, MD, Francesco Gaeta, MD, Rocco Luigi Valluzzi, MD, Michela Maggioletti, MD, Cristiano Caruso, MD, Donato Quaratino, MD  Journal of Allergy and Clinical Immunology  Volume 138, Issue 1, Pages 179-186 (July 2016) DOI: 10.1016/j.jaci.2016.01.025 Copyright © 2016 American Academy of Allergy, Asthma & Immunology Terms and Conditions

Fig 1 Chemical structures of penicillins, cephalosporins, and aztreonam, with the amino group, common β-lactam ring, dihydrothiazine ring, and thiazolidine ring highlighted in gray. Journal of Allergy and Clinical Immunology 2016 138, 179-186DOI: (10.1016/j.jaci.2016.01.025) Copyright © 2016 American Academy of Allergy, Asthma & Immunology Terms and Conditions