title: A 25-year-old woman reporting an allergy to penicillin.
authors.affiliation: Department of Medicine (Castellani, Gold, MacFadden), University of Toronto, Toronto, Ont.; Division of Infectious Diseases (Gold, MacFadden), University Health Network, Toronto, Ont.
authors.forename: Lucas R
authors.initials: LR
authors.lastname: Castellani
authors.affiliation: Department of Medicine (Castellani, Gold, MacFadden), University of Toronto, Toronto, Ont.; Division of Infectious Diseases (Gold, MacFadden), University Health Network, Toronto, Ont.
authors.forename: Wayne L
authors.initials: WL
authors.lastname: Gold
authors.affiliation: Department of Medicine (Castellani, Gold, MacFadden), University of Toronto, Toronto, Ont.; Division of Infectious Diseases (Gold, MacFadden), University Health Network, Toronto, Ont. derek.macfadden@mail.utoronto.ca.
authors.forename: Derek R
authors.initials: DR
authors.lastname: MacFadden
mesh_terms: D000328:Adult; D000900:Anti-Bacterial Agents / Q000627:therapeutic use*; D004342:Drug Hypersensitivity / Q000175:diagnosis*; D005260:Female; D006801:Humans; D008487:Medical History Taking; D010401:Penicillin G Benzathine / Q000627:therapeutic use*; D011247:Pregnancy; D011251:Pregnancy Complications, Infectious / Q000188:drug therapy*; D057566:Self Report; D012882:Skin Tests; D013592:Syphilis, Latent / Q000188:drug therapy*
chemical_list: D000900:Anti-Bacterial Agents; D010401:Penicillin G Benzathine