Cross-allergenicity of the penicillins and the cephalosporins.
D000328:Adult; D002511:Cephalosporins / Q000009:adverse effects*; D004342:Drug Hypersensitivity; D006801:Humans; D008297:Male; D010406:Penicillins / Q000009:adverse effects*; D012882:Skin Tests
D002511:Cephalosporins; D010406:Penicillins