title: Failure of a cephalothin test dose to produce anaphylaxis.
mesh_terms: D000707:Anaphylaxis / Q000139:chemically induced* / Q000175:diagnosis; D002512:Cephalothin / Q000009:adverse effects*; D004342:Drug Hypersensitivity / Q000175:diagnosis* / Q000209:etiology; D005188:False Negative Reactions; D006801:Humans
chemical_list: D002512:Cephalothin