Gloves and hand washing.
D003428:Cross Infection / Q000517:prevention & control / Q000635:transmission; D004282:Documentation; D020776:Endoscopes, Gastrointestinal / Q000382:microbiology / Q000469:parasitology / Q000821:virology; D016099:Endoscopy, Gastrointestinal / Q000451:nursing*; D004866:Equipment Contamination / Q000517:prevention & control*; D017575:Gloves, Protective / Q000706:statistics & numerical data*; D006235:Hand Disinfection / Q000379:methods; D006801:Humans; D017053:Infection Control / Q000379:methods*