Room disinfection was defined as the cleansing and disinfection of the surface of the facility, endoscopist's gown, and air in the endoscopy room after the examination. Specifically, sanitizing wipes wiped the surface of the facility one by one, containing quaternary ammonium salt, alcohol, and interfacial activator; the air disinfection machine continued for 30min of air disinfection. Daily room disinfection was defined as disinfection after completing 8 non-general anesthesia gastroscopy or 4 general anesthesia gastroscopy.

Room disinfection was defined as the cleansing and disinfection of the surface of the facility, endoscopist's gown, and air in the endoscopy room after the examination. Specifically, sanitizing wipes wiped the surface of the facility one by one, containing quaternary ammonium salt, alcohol, and interfacial activator; the air disinfection machine continued for 30min of air disinfection. After-each-case room disinfection was defined as after completing each case.

After-each-case room disinfection was defined as after completing each case.

The samples of workstation's mouse, control panel buttons and patient's bed headboard greater than 10 CFU/cm2, samples of endoscopist's gown greater than 200 CFU/suit, and samples of operation unit air greater than 500 CFU/m3 are deemed as an unacceptable level of bioburden.

The number of colony-forming units (CFU) of operation unit air, workstation's mouse, endoscopist's gown, control panel buttons, and patient's bed headboard.