title: Occult penicillin exposure reaction.
mesh_terms: D000328:Adult; D004342:Drug Hypersensitivity / Q000209:etiology*; D005260:Female; D006801:Humans; D010406:Penicillins / Q000009:adverse effects*; D010502:Perineum / Q000187:drug effects* / Q000473:pathology
chemical_list: D010406:Penicillins