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Role of Clinical Endoscopy in Emphasizing Endoscope Disinfection

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      Abstract

      Based on the unexpected Middle East respiratory syndrome (MERS) outbreak in Korea, it was established that the virus can spread easily, MERS exposure in hospitals carries an extreme risk for infection as well as mortality, and the sharing of information was essential for infection control. Although the incidence of exogenous infections related to contaminated endoscopes is very low, the majority of published outbreaks have been caused by various shortcomings in reprocessing procedures, including insufficient training or awareness. Ever since the inauguration of " Clinical Endoscopy" as an English-language journal of the Korean Society of Gastrointestinal Endoscopy in 2011, it has published several articles on disinfection of the endoscope and its accessories. Many Science Citation Index journals have also emphasized high-level disinfection of the gastrointestinal endoscope. Many papers have been produced specifically, since the outbreak of carbapenem-resistant Enterobacteriaceae in 2013. The recent review papers concluded that quality control is the most important issue among all the aspects of procedural care, including the efficiency of the gastrointestinal endoscopy unit and reprocessing room. Thorough reprocessing of endoscopes using high-level disinfection and sterilization methods may be essential for reducing the risk of infection.

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      Most cited references 24

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      Transmission of infection by flexible gastrointestinal endoscopy and bronchoscopy.

      Flexible endoscopy is a widely used diagnostic and therapeutic procedure. Contaminated endoscopes are the medical devices frequently associated with outbreaks of health care-associated infections. Accurate reprocessing of flexible endoscopes involves cleaning and high-level disinfection followed by rinsing and drying before storage. Most contemporary flexible endoscopes cannot be heat sterilized and are designed with multiple channels, which are difficult to clean and disinfect. The ability of bacteria to form biofilms on the inner channel surfaces can contribute to failure of the decontamination process. Implementation of microbiological surveillance of endoscope reprocessing is appropriate to detect early colonization and biofilm formation in the endoscope and to prevent contamination and infection in patients after endoscopic procedures. This review presents an overview of the infections and cross-contaminations related to flexible gastrointestinal endoscopy and bronchoscopy and illustrates the impact of biofilm on endoscope reprocessing and postendoscopic infection.
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        Transmission of infection by gastrointestinal endoscopy and bronchoscopy.

        To review reports on the transmission of infections by flexible gastrointestinal endoscopy and bronchoscopy in order to determine common infecting microorganisms, circumstances of transmission, and methods of risk reduction. Relevant English-language articles were identified through prominent review articles and a MEDLINE search (1966 to July 1992); additional references were selected from the bibliographies of identified articles. All selected articles related to transmission of infection by gastrointestinal endoscopy or bronchoscopy; 265 articles were reviewed in detail. Two hundred and eighty-one infections were transmitted by gastrointestinal endoscopy, and 96 were transmitted by gastrointestinal endoscopy, spectrum of these infections ranged from asymptomatic colonization to death. Salmonella species and Pseudomonas aeruginosa were repeatedly identified as the causative agents of infections transmitted by gastrointestinal endoscopy, and Mycobacterium tuberculosis, atypical mycobacteria, and P. aeruginosa were the most common causes of infections transmitted by bronchoscopy. One case of hepatitis B virus transmission via gastrointestinal endoscopy was documented. Major reasons for transmission were improper cleaning and disinfection procedures; the contamination of endoscopes by automatic washers; and an inability to decontaminate endoscopes, despite the use of standard disinfection techniques, because of their complex channel and valve systems. The most common agents of infection transmitted by endoscopy are Salmonella, Pseudomonas, and Mycobacterium species. To prevent endoscopic transmission of infections, recommended disinfection guidelines must be followed, the effectiveness of automatic washers must be carefully monitored, and improvements in endoscope design are needed to facilitate effective cleaning and disinfection.
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          Klebsiella spp. in endoscopy-associated infections: we may only be seeing the tip of the iceberg.

          Two endoscopy-associated nosocomial outbreaks caused by carbapenemase-producing Klebsiella pneumoniae (CPKP) were recently observed in two German hospitals. In this study, we performed a systematic search of the medical literature in order to elucidate the epidemiology of Klebsiella spp. in endoscopy-associated outbreaks.
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            Author and article information

            Affiliations
            [1 ]Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea.
            [2 ]Department of Internal Medicine, Catholic University of Daegu School of Medicine, Daegu, Korea.
            [3 ]Department of Gastroenterology, Gachon University Gil Medical Center, Gachon University College of Medicine, Incheon, Korea.
            [4 ]Center for Gastric Cancer, National Cancer Center, Goyang, Korea.
            [5 ]Digestive Disease Center, CHA Bundang Medical Center, CHA University, Seongnam, Korea.
            Author notes
            Correspondence: Ki Baik Hahm. Digestive Disease Center, CHA Bundang Medical Center, CHA University, 59 Yatap-ro, Bundang-gu, Seongnam 13496, Korea. Tel: +82-31-780-5005, Fax: +82-31-780-5219, hahmkb@ 123456cha.ac.kr
            Journal
            Clin Endosc
            Clin Endosc
            CE
            Clinical Endoscopy
            The Korean Society of Gastrointestinal Endoscopy
            2234-2400
            2234-2443
            September 2015
            30 September 2015
            : 48
            : 5
            : 351-355
            4604269 10.5946/ce.2015.48.5.351
            Copyright © 2015 Korean Society of Gastrointestinal Endoscopy

            This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

            Categories
            Focused Review Series: Endoscopic Disinfection in the Era of MERS

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