title: 'Mad cow' particle challenges infection control.
mesh_terms: D007562:Creutzfeldt-Jakob Syndrome / Q000517:prevention & control* / Q000601:surgery / Q000635:transmission; D003428:Cross Infection / Q000517:prevention & control*; D004866:Equipment Contamination; D006801:Humans; D017053:Infection Control; D007484:Iowa; D011328:Prions / Q000187:drug effects; D013242:Sterilization / Q000379:methods; D013523:Surgical Equipment; D014481:United States; D016635:Universal Precautions