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Bereanu AS, Vintilă BI, Bereanu R, Codru IR, Hașegan A, Olteanu C, Săceleanu V, Sava M. TiO 2 Nanocomposite Coatings and Inactivation of Carbapenemase-Producing Klebsiella Pneumoniae Biofilm-Opportunities and Challenges. Microorganisms 2024; 12:684. [PMID: 38674628 PMCID: PMC11051735 DOI: 10.3390/microorganisms12040684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 03/26/2024] [Accepted: 03/27/2024] [Indexed: 04/28/2024] Open
Abstract
The worldwide increase of multidrug-resistant Gram-negative bacteria is a global threat. The emergence and global spread of Klebsiella pneumoniae carbapenemase- (KPC-) producing Klebsiella pneumoniae represent a particular concern. This pathogen has increased resistance and abilities to persist in human reservoirs, in hospital environments, on medical devices, and to generate biofilms. Mortality related to this microorganism is high among immunosuppressed oncological patients and those with multiple hospitalizations and an extended stay in intensive care. There is a severe threat posed by the ability of biofilms to grow and resist antibiotics. Various nanotechnology-based strategies have been studied and developed to prevent and combat serious health problems caused by biofilm infections. The aim of this review was to evaluate the implications of nanotechnology in eradicating biofilms with KPC-producing Klebsiella pneumoniae, one of the bacteria most frequently associated with nosocomial infections in intensive care units, including in our department, and to highlight studies presenting the potential applicability of TiO2 nanocomposite materials in hospital practice. We also described the frequency of the presence of bacterial biofilms on medical surfaces, devices, and equipment. TiO2 nanocomposite coatings are one of the best long-term options for antimicrobial efficacy due to their biocompatibility, stability, corrosion resistance, and low cost; they find their applicability in hospital practice due to their critical antimicrobial role for surfaces and orthopedic and dental implants. The International Agency for Research on Cancer has recently classified titanium dioxide nanoparticles (TiO2 NPs) as possibly carcinogenic. Currently, there is an interest in the ecological, non-toxic synthesis of TiO2 nanoparticles via biological methods. Biogenic, non-toxic nanoparticles have remarkable properties due to their biocompatibility, stability, and size. Few studies have mentioned the use of nanoparticle-coated surfaces as antibiofilm agents. A literature review was performed to identify publications related to KPC-producing Klebsiella pneumoniae biofilms and antimicrobial TiO2 photocatalytic nanocomposite coatings. There are few reviews on the antibacterial and antibiofilm applications of TiO2 photocatalytic nanocomposite coatings. TiO2 nanoparticles demonstrated marked antibiofilm activity, but being nano in size, these nanoparticles can penetrate cell membranes and may initiate cellular toxicity and genotoxicity. Biogenic TiO2 nanoparticles obtained via green, ecological technology have less applicability but are actively investigated.
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Affiliation(s)
- Alina-Simona Bereanu
- Faculty of Medicine, Lucian Blaga University of Sibiu, Lucian Blaga Street 2A, 550169 Sibiu, Romania; (A.-S.B.); (R.B.); (A.H.); (V.S.); (M.S.)
- County Clinical Emergency Hospital, Bld. Corneliu Coposu nr. 2-4, 550245 Sibiu, Romania;
| | - Bogdan Ioan Vintilă
- Faculty of Medicine, Lucian Blaga University of Sibiu, Lucian Blaga Street 2A, 550169 Sibiu, Romania; (A.-S.B.); (R.B.); (A.H.); (V.S.); (M.S.)
- County Clinical Emergency Hospital, Bld. Corneliu Coposu nr. 2-4, 550245 Sibiu, Romania;
| | - Rareș Bereanu
- Faculty of Medicine, Lucian Blaga University of Sibiu, Lucian Blaga Street 2A, 550169 Sibiu, Romania; (A.-S.B.); (R.B.); (A.H.); (V.S.); (M.S.)
| | - Ioana Roxana Codru
- Faculty of Medicine, Lucian Blaga University of Sibiu, Lucian Blaga Street 2A, 550169 Sibiu, Romania; (A.-S.B.); (R.B.); (A.H.); (V.S.); (M.S.)
- County Clinical Emergency Hospital, Bld. Corneliu Coposu nr. 2-4, 550245 Sibiu, Romania;
| | - Adrian Hașegan
- Faculty of Medicine, Lucian Blaga University of Sibiu, Lucian Blaga Street 2A, 550169 Sibiu, Romania; (A.-S.B.); (R.B.); (A.H.); (V.S.); (M.S.)
- County Clinical Emergency Hospital, Bld. Corneliu Coposu nr. 2-4, 550245 Sibiu, Romania;
| | - Ciprian Olteanu
- County Clinical Emergency Hospital, Bld. Corneliu Coposu nr. 2-4, 550245 Sibiu, Romania;
| | - Vicențiu Săceleanu
- Faculty of Medicine, Lucian Blaga University of Sibiu, Lucian Blaga Street 2A, 550169 Sibiu, Romania; (A.-S.B.); (R.B.); (A.H.); (V.S.); (M.S.)
- County Clinical Emergency Hospital, Bld. Corneliu Coposu nr. 2-4, 550245 Sibiu, Romania;
| | - Mihai Sava
- Faculty of Medicine, Lucian Blaga University of Sibiu, Lucian Blaga Street 2A, 550169 Sibiu, Romania; (A.-S.B.); (R.B.); (A.H.); (V.S.); (M.S.)
- County Clinical Emergency Hospital, Bld. Corneliu Coposu nr. 2-4, 550245 Sibiu, Romania;
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Ding Y, Zhuang H, Zhou J, Xu L, Yang Y, He J, Liang M, Jia S, Guo X, Han X, Liu H, Zhang L, Jiang Y, Yu Y. Epidemiology and Genetic Characteristics of Carbapenem-Resistant Escherichia coli in Chinese Intensive Care Unit Analyzed by Whole-Genome Sequencing: a Prospective Observational Study. Microbiol Spectr 2023; 11:e0401022. [PMID: 36802220 PMCID: PMC10100791 DOI: 10.1128/spectrum.04010-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2022] [Accepted: 01/30/2023] [Indexed: 02/23/2023] Open
Abstract
This 4-month-long prospective observational study investigated the epidemiological characteristics, genetic composition, transmission pattern, and infection control of carbapenem-resistant Escherichia coli (CREC) colonization in patients at an intensive care unit (ICU) in China. Phenotypic confirmation testing was performed on nonduplicated isolates from patients and their environments. Whole-genome sequencing was performed for all E. coli isolates, followed by multilocus sequence typing (MLST), and antimicrobial resistance genes and single nucleotide polymorphisms (SNPs) were screened. The colonization rates of CREC were 7.29% from the patient specimens and 0.39% from the environmental specimens. Among the 214 E. coli isolates tested, 16 were carbapenem resistant, with the blaNDM-5 gene identified as the dominant carbapenemase-encoding gene. Among the low-homology sporadic strains isolated in this study, the main sequence type (ST) of carbapenem-sensitive Escherichia coli (CSEC) was ST1193, whereas the majority of CREC isolates belonged to ST1656, followed by ST131. CREC isolates were more sensitive to disinfectants than were the carbapenem-resistant Klebsiella pneumoniae (CRKP) isolates obtained in the same period, which may explain the lower separation rate. Therefore, effective interventions and active screening are beneficial to the prevention and control of CREC. IMPORTANCE CREC represents a public health threat worldwide, and its colonization precedes or occurs simultaneously with infection; once the colonization rate increases, the infection rate rises sharply. In our hospital, the colonization rate of CREC remained low, and almost all of the CREC isolates detected were ICU acquired. Contamination of the surrounding environment by CREC carrier patients shows a very limited spatiotemporal distribution. As the dominant ST of the CSEC isolates found, ST1193 CREC might be considered a strain of notable concern with potential to cause a future outbreak. ST1656 and ST131 also deserve attention, as they comprised the majority of the CREC isolates found, while blaNDM-5 gene screening should play an important role in medication guidance as the main carbapenem resistance gene identified. The disinfectant chlorhexidine, which is used commonly in the hospital, is effective for CREC rather than CRKP, possibly explaining the lower positivity rate for CREC than for CRKP.
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Affiliation(s)
- Ying Ding
- Department of Intensive Care Unit, Sir Run Run Shaw Hospital Qiantang Campus, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, China
- Key Laboratory of Microbial Technology and Bioinformatics of Zhejiang Province, Hangzhou, Zhejiang Province, China
- Regional Medical Center for National Institute of Respiratory Diseases, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, China
| | - Hemu Zhuang
- Department of Infectious Diseases, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, China
- Key Laboratory of Microbial Technology and Bioinformatics of Zhejiang Province, Hangzhou, Zhejiang Province, China
- Regional Medical Center for National Institute of Respiratory Diseases, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, China
| | - Junxin Zhou
- Department of Infectious Diseases, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, China
- Key Laboratory of Microbial Technology and Bioinformatics of Zhejiang Province, Hangzhou, Zhejiang Province, China
- Regional Medical Center for National Institute of Respiratory Diseases, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, China
| | - Lijie Xu
- Department of Intensive Care Unit, Sir Run Run Shaw Hospital Qiantang Campus, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, China
| | - Yi Yang
- Department of Pharmacy, Sir Run Run Shaw Hospital Xiasha Campus, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, China
| | - Jintao He
- Department of Infectious Diseases, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, China
- Key Laboratory of Microbial Technology and Bioinformatics of Zhejiang Province, Hangzhou, Zhejiang Province, China
- Regional Medical Center for National Institute of Respiratory Diseases, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, China
| | - Min Liang
- Department of Intensive Care Unit, Sir Run Run Shaw Hospital Qiantang Campus, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, China
- Key Laboratory of Microbial Technology and Bioinformatics of Zhejiang Province, Hangzhou, Zhejiang Province, China
- Regional Medical Center for National Institute of Respiratory Diseases, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, China
| | - Shicheng Jia
- Shantou University Medical College, Shantou, Guangdong Province, China
| | - Xiuliu Guo
- Department of Intensive Care Unit, Sir Run Run Shaw Hospital Qiantang Campus, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, China
- Key Laboratory of Microbial Technology and Bioinformatics of Zhejiang Province, Hangzhou, Zhejiang Province, China
- Regional Medical Center for National Institute of Respiratory Diseases, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, China
| | - Xinhong Han
- Department of Infectious Diseases, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, China
- Key Laboratory of Microbial Technology and Bioinformatics of Zhejiang Province, Hangzhou, Zhejiang Province, China
- Regional Medical Center for National Institute of Respiratory Diseases, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, China
| | - Haiyang Liu
- Department of Infectious Diseases, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, China
- Key Laboratory of Microbial Technology and Bioinformatics of Zhejiang Province, Hangzhou, Zhejiang Province, China
- Regional Medical Center for National Institute of Respiratory Diseases, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, China
| | - Linghong Zhang
- Department of Infectious Diseases, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, China
- Key Laboratory of Microbial Technology and Bioinformatics of Zhejiang Province, Hangzhou, Zhejiang Province, China
- Regional Medical Center for National Institute of Respiratory Diseases, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, China
| | - Yan Jiang
- Department of Infectious Diseases, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, China
- Key Laboratory of Microbial Technology and Bioinformatics of Zhejiang Province, Hangzhou, Zhejiang Province, China
- Regional Medical Center for National Institute of Respiratory Diseases, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, China
| | - Yunsong Yu
- Department of Infectious Diseases, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, China
- Key Laboratory of Microbial Technology and Bioinformatics of Zhejiang Province, Hangzhou, Zhejiang Province, China
- Regional Medical Center for National Institute of Respiratory Diseases, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, China
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Casini B, Spagnolo AM, Sartini M, Tuvo B, Scarpaci M, Barchitta M, Pan A, Agodi A, Cristina ML, Castiglia P, De Giusti M, Distefano M, Longhitano A, Laganà P, Mentore B, Canale F, Mantero F, Opezzi M, Marciano E, Zurlo L, Segata A, Torre I, Vay D, Vecchi E, Vincenti S. Microbiological surveillance post-reprocessing of flexible endoscopes used in digestive endoscopy: a national study. J Hosp Infect 2023; 131:139-147. [PMID: 36244520 DOI: 10.1016/j.jhin.2022.09.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Revised: 08/17/2022] [Accepted: 09/19/2022] [Indexed: 11/25/2022]
Abstract
INTRODUCTION Microbiological surveillance of endoscopes is a safety measure for verifying the quality of reprocessing procedures and identifying contaminated devices, but duodenoscope-related outbreaks are still reported. AIM To assess the effectiveness of duodenoscope reprocessing procedures in Italy. METHODS Between December 2019 and April 2020, data obtained from microbiological surveillance post-reprocessing in 15 Italian endoscopy units were collected. Sampling was carried out after reprocessing or during storage in a cabinet. In keeping with international guidelines and the Italian position paper, the micro-organisms were classified as high-concern organisms (HCOs) and low-concern organisms (LCOs). FINDINGS In total, 144 samples were collected from 51 duodenoscopes. Of these, 36.81% were contaminated: 22.92% were contaminated with HCOs and 13.89% were contaminated with LCOs [2.08% with an LCO load of 11-100 colony-forming units (CFU)/device and 0.69% with an LCO load of >100 CFU/device]. The contamination rate was 27.5% in samples collected after reprocessing, 40% in samples collected during storage in a cabinet that was compliant with EN 16442:2015 (C-I), and 100% in samples collected during storage in a cabinet that was not compliant with EN 16442:2015 (NC-I). The respective HCO rates were 15.00%, 27.27% and 66.67%. Correlation between LCO contamination and storage time was demonstrated (Spearman's rho=0.3701; P=0.0026). The Olympus duodenoscope TJFQ180V demonstrated the lowest rate of contamination (29.82%), although the contamination rate was 100% for duodenoscopes stored in an NC-I cabinet. CONCLUSION Microbiological surveillance, along with strict adherence to reprocessing protocols, may help to detect endoscope contamination at an early stage, and reduce the risk of duodenoscope-associated infections.
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Affiliation(s)
- B Casini
- Department of Translational Research, New Technologies in Medicine and Surgery, University of Pisa, Pisa, Italy
| | - A M Spagnolo
- Department of Health Sciences, University of Genova, Genova, Italy; Operating Unit Hospital Hygiene, Galliera Hospital, Genoa, Italy.
| | - M Sartini
- Department of Health Sciences, University of Genova, Genova, Italy; Operating Unit Hospital Hygiene, Galliera Hospital, Genoa, Italy.
| | - B Tuvo
- Department of Translational Research, New Technologies in Medicine and Surgery, University of Pisa, Pisa, Italy
| | - M Scarpaci
- Department of Translational Research, New Technologies in Medicine and Surgery, University of Pisa, Pisa, Italy
| | - M Barchitta
- Department of Medical, Surgical and Advanced Technology Sciences "G.F. Ingrassia", University of Catania, Catania, Italy
| | - A Pan
- Operating Unit of Infectious Diseases, ASST Cremona, Cremona, Italy
| | - A Agodi
- Department of Medical, Surgical and Advanced Technology Sciences "G.F. Ingrassia", University of Catania, Catania, Italy
| | - M L Cristina
- Department of Health Sciences, University of Genova, Genova, Italy; Operating Unit Hospital Hygiene, Galliera Hospital, Genoa, Italy
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Josephs-Spaulding J, Singh OV. Medical Device Sterilization and Reprocessing in the Era of Multidrug-Resistant (MDR) Bacteria: Issues and Regulatory Concepts. FRONTIERS IN MEDICAL TECHNOLOGY 2022; 2:587352. [PMID: 35047882 PMCID: PMC8757868 DOI: 10.3389/fmedt.2020.587352] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2020] [Accepted: 11/10/2020] [Indexed: 12/20/2022] Open
Abstract
The emergence of multidrug-resistant (MDR) bacteria threatens humans in various health sectors, including medical devices. Since formal classifications for medical device sterilization and disinfection were established in the 1970's, microbial adaptation under adverse environmental conditions has evolved rapidly. MDR microbial biofilms that adhere to medical devices and recurrently infect patients pose a significant threat in hospitals. Therefore, it is essential to mitigate the risk associated with MDR outbreaks by establishing novel recommendations for medical device sterilization, in a world of MDR. MDR pathogens typically thrive on devices with flexible accessories, which are easily contaminated with biofilms due to previous patient use and faulty sterilization or reprocessing procedures. To prevent danger to immunocompromised individuals, there is a need to regulate the classification of reprocessed medical device sterilization. This article aims to assess the risks of improper sterilization of medical devices in the era of MDR when sterilization procedures for critical medical devices are not followed to standard. Further, we discuss key regulatory recommendations for consistent sterilization of critical medical devices in contrast to the risks of disinfection reusable medical devices.
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Affiliation(s)
- Jonathan Josephs-Spaulding
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, United States
| | - Om V Singh
- Advance Academic Program, The Johns Hopkins University, Washington, DC, United States.,Technology Science Group (TSG) Consulting Inc., A Science Group Company, Washington, DC, United States
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Heuvelmans M, Wunderink HF, van der Mei HC, Monkelbaan JF. A narrative review on current duodenoscope reprocessing techniques and novel developments. Antimicrob Resist Infect Control 2021; 10:171. [PMID: 34949217 PMCID: PMC8697464 DOI: 10.1186/s13756-021-01037-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Accepted: 11/19/2021] [Indexed: 11/10/2022] Open
Abstract
Duodenoscopy-associated infections occur worldwide despite strict adherence to reprocessing standards. The exact scope of the problem remains unknown because a standardized sampling protocol and uniform sampling techniques are lacking. The currently available multi-society protocol for microbial culturing by the Centers for Disease Control and Prevention, the United States Food and Drug Administration (FDA) and the American Society for Microbiology, published in 2018 is too laborious for broad clinical implementation. A more practical sampling protocol would result in increased accessibility and widespread implementation. This will aid to reduce the prevalence of duodenoscope contamination. To reduce the risk of duodenoscopy-associated pathogen transmission the FDA advised four supplemental reprocessing measures. These measures include double high-level disinfection, microbiological culturing and quarantine, ethylene oxide gas sterilization and liquid chemical sterilization. When the supplemental measures were advised in 2015 data evaluating their efficacy were sparse. Over the past five years data regarding the supplemental measures have become available that place the efficacy of the supplemental measures into context. As expected the advised supplemental measures have resulted in increased costs and reprocessing time. Unfortunately, it has also become clear that the efficacy of the supplemental measures falls short and that duodenoscope contamination remains a problem. There is a lot of research into new reprocessing methods and technical applications trying to solve the problem of duodenoscope contamination. Several promising developments such as single-use duodenoscopes, electrolyzed acidic water, and vaporized hydrogen peroxide plasma are already applied in a clinical setting.
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Affiliation(s)
- Maarten Heuvelmans
- Department of Medical Microbiology, University Medical Center Utrecht, G04.643, PO box 85500, 3508GA, Utrecht, The Netherlands.
| | - Herman F Wunderink
- Department of Medical Microbiology, University Medical Center Utrecht, G04.643, PO box 85500, 3508GA, Utrecht, The Netherlands
| | - Henny C van der Mei
- Department of Biomedical Engineering, University of Groningen and University Medical Center Groningen, Groningen, The Netherlands
| | - Jan F Monkelbaan
- Department of Gastroenterology and Hepatology, University Medical Center Utrecht, Utrecht, The Netherlands
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Spinzi G, Milano A, Brosolo P, Da Massa Carrara P, Labardi M, Merighi A, Riccardi L, Torresan F, Capelli M. Accreditation program for gastrointestinal endoscopes reprocessing in Italy: An on-site survey. Endosc Int Open 2021; 9:E1627-E1632. [PMID: 34790524 PMCID: PMC8589566 DOI: 10.1055/a-1535-1238] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/26/2020] [Accepted: 06/10/2021] [Indexed: 12/16/2022] Open
Abstract
Background and study aims Endoscope reprocessing has been associated with a variable failure rate. Our aim was to present an overview on current practices for reprocessing in Italian facilities and discuss the principle critical points. Methods In 2014 the Italian Society for Digestive Diseases implemented an accreditation program in collaboration with an independent organization for certification and with the Italian Association for Endoscopy Technical Operators. During a 1-day site visit of the endoscopy center, two endoscopists, one nurse, and the representative of the certification body evaluated the endoscope reprocessing. Results As of July 1, 2020, 28 endoscopy centers had been accredited. Ten centers are completing the measures to correct deficiencies found at the visit. Three centers withdrew from the program. The accreditation program has found variations between the various centers, confirming the poor compliance with guidelines. Major deviations from the standards, established by the model before the site visit according to national and international guidelines, concerned instrument cleaning (44.7 % of the centers), instrument storage (23.7 %), and microbiological tests (31.6 %). Conclusions Our overview demonstrated the lack of many reprocessing phases, which are important to prevent endoscopy-associated infections. Accreditation can achieve a transformation in quality and safety of reprocessing with the Italian centrally-led approach.
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Affiliation(s)
- Giancarlo Spinzi
- Gasastroenterology and Endoscopy Department, Valduce Hospital, Como – Italy
| | - Angelo Milano
- Gastroenterology and Endoscopy Department, Chieti University, Chieti – Italy
| | - Piero Brosolo
- Gastroenterology and Endoscopy Department, Pordenone Hospital, Pordenone – Italy
| | | | - Maurizio Labardi
- Gastroenterology and Endoscopy Department, Firenze Hospital, Firenze – Italy
| | - Alberto Merighi
- Gastroenterology and Endoscopy Department, Ferrara Hospital, Ferrara – Italy
| | - Luisa Riccardi
- Gastroenterology and Endoscopy Department, Perugia Hospital, Perugia – Italy
| | - Francesco Torresan
- Gastroenterology and Endoscopy Department, Bologna University, Bologna – Italy
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Huang F, Li S, Lou L, Mo J, Xu H. Comparative Genomic Analysis and Phenotypic Characterization of Bronchoscope-Associated Klebsiella aerogenes. Pol J Microbiol 2021; 70:409-412. [PMID: 34584536 PMCID: PMC8459003 DOI: 10.33073/pjm-2021-038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2021] [Revised: 07/21/2021] [Accepted: 08/04/2021] [Indexed: 11/05/2022] Open
Abstract
Bronchoscopes have been linked to outbreaks of nosocomial infections. The phenotypic and genomic profiles of bronchoscope-associated Klebsiella aerogenes isolates are largely unknown. In this work, a total of 358 isolates and 13 isolates were recovered from samples after clinical procedures and samples after decontamination procedures, respectively, over the five months. Antimicrobial susceptibility testing found seven K. aerogenes isolates exhibiting a low-level resistance to antimicrobial agents. Among seven K. aerogenes isolates, we found five sequence types (STs) clustered into three main clades. Collectively, this study described for the first time the phenotypic and genomic characteristics of bronchoscope-associated K. aerogenes.
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Affiliation(s)
- Fang Huang
- Disinfection and Sterilization Center, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Shuang Li
- Department of Laboratory Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China.,Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Lan Lou
- Disinfection and Sterilization Center, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Junjun Mo
- Disinfection and Sterilization Center, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Hao Xu
- Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
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Bomman S, Kozarek RA, Thaker AM, Kodama C, Muthusamy VR, Ross AS, Krishnamoorthi R. Economic burden of enhanced practices of duodenoscopes reprocessing and surveillance: balancing risk and cost containment. Endosc Int Open 2021; 9:E1404-E1412. [PMID: 34466366 PMCID: PMC8382507 DOI: 10.1055/a-1515-2591] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Accepted: 05/11/2021] [Indexed: 12/11/2022] Open
Abstract
Background and study aims Recent outbreaks attributed to contaminated duodenoscopes have led to the development of enhanced surveillance and reprocessing techniques (enhanced-SRT) aimed at minimizing cross-contamination. Common enhanced-SRT include double high-level disinfection (HLD), ethylene oxide (EtO) gas sterilization, and culture-based monitoring of reprocessed scopes. Adoption of these methods adds to the operational costs and we aimed to assess its economic impact to an institution. Methods We compared the estimated costs of three enhanced-SRT versus single-HLD using data from two institutions. We examined the cost of capital measured as scope inventory and frequency of scope use per unit time, the constituent reprocessing costs required on a per-cycle basis, and labor & staffing needs. The economic impact attributable to enhanced-SRT was defined as the difference between the total cost of enhanced-SRT and single HLD. Results Compared to single HLD, adoption of double HLD increased the costs approximately by 47 % ($80 vs $118). Similarly, culture and quarantine and EtO sterilization increased costs by 160 % and 270 %, respectively ($80 vs $208 and $296). Enhanced-SRT introduced significant scope downtime due to prolonged techniques, necessitating a 3.4-fold increase in the number of scopes needed to maintain procedural volume. The additional annual budget required to implement enhanced-SRT approached $406,000 per year in high-volume centers. Conclusions While enhanced-SRT may reduce patient risk of exposure to contaminated duodenoscopes, it significantly increases the cost of performing ERCP. Future innovation should focus on approaches that can ensure patient safety while maintaining the ability to perform ERCP in a cost-effective manner.
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Affiliation(s)
- Shivanand Bomman
- Digestive Disease Institute, Virginia Mason Medical Center, Seattle, Washington, United States
| | - Richard A. Kozarek
- Digestive Disease Institute, Virginia Mason Medical Center, Seattle, Washington, United States
| | - Adarsh M. Thaker
- Vatche and Tamar Manoukian Division of Digestive Diseases, David Geffen School of Medicine at UCLA, Los Angeles, California, United States
| | - Camilla Kodama
- Vatche and Tamar Manoukian Division of Digestive Diseases, David Geffen School of Medicine at UCLA, Los Angeles, California, United States
| | - V. Raman Muthusamy
- Vatche and Tamar Manoukian Division of Digestive Diseases, David Geffen School of Medicine at UCLA, Los Angeles, California, United States
| | - Andrew S. Ross
- Digestive Disease Institute, Virginia Mason Medical Center, Seattle, Washington, United States
| | - Rajesh Krishnamoorthi
- Digestive Disease Institute, Virginia Mason Medical Center, Seattle, Washington, United States
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Tian H, Sun J, Guo S, Zhu X, Feng H, Zhuang Y, Wang X. The Effectiveness of Drying on Residual Droplets, Microorganisms, and Biofilms in Gastrointestinal Endoscope Reprocessing: A Systematic Review. Gastroenterol Res Pract 2021; 2021:6615357. [PMID: 33927758 PMCID: PMC8049816 DOI: 10.1155/2021/6615357] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 03/21/2021] [Accepted: 03/23/2021] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Despite endoscope reprocessing, residual droplets remain in gastrointestinal endoscope working channels. Inadequate drying of gastrointestinal endoscope working channels may promote microbial reproduction and biofilm formation, increasing the risk of infection in patients. This review was designed to provide the current status of gastrointestinal endoscope drying, emphasize the importance of gastrointestinal endoscope drying, and evaluate the effectiveness of different drying methods of gastrointestinal endoscope in reducing residual droplets and microbial growth risk. METHODS A systematic review was conducted according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) reporting checklist. The PubMed, Web of Science, Medline, EMBASE, EBSCO, CNKI, CQVIP, and Wanfang Data databases were searched from 2010 to 2020 to identify eligible articles focused on methods of gastrointestinal endoscope drying and the status of endoscope drying. The following key points were analyzed: type of intervention, amount of residual droplets, major microbial types, and effectiveness of biofilm intervention. JBI quality assessment tool was used to determine bias risk for inclusion in the article. RESULTS This review included twelve articles. Two of the articles reported lack of drying of gastrointestinal endoscopes while the other ten reported residual droplets, microbial growth, and biofilm formation after different methods of drying. Four articles reported 0 to 4.55 residual droplets; four articles reported that the main microbial types were cocci and bacilli, most commonly Staphylococcus, Escherichia coli, Bacillus maltophilia, and Pseudomonas aeruginosa; and two reported that drying could effectively reduce biofilm regeneration. The type of intervention is as follows: automatic endoscopy reprocessor (AER), manual compressed air drying, and the Dri-Scope Aid for automatic drying and drying cabinet. CONCLUSIONS While endoscope reprocessing may not always be effective, an automatic endoscope reprocessor plus the Dri-Scope Aid with automatic drying over 10 min or storage in a drying cabinet for 72 h may be preferred.
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Affiliation(s)
- Hefeng Tian
- 1The First Hospital of Jilin University, Changchun, China
| | - Jiao Sun
- 2School of Nursing, Jilin University, No. 965 Xinjiang Street, Changchun, Jilin Province 130021, China
| | - Shaoning Guo
- 1The First Hospital of Jilin University, Changchun, China
| | - Xuanrui Zhu
- 1The First Hospital of Jilin University, Changchun, China
| | - Han Feng
- 1The First Hospital of Jilin University, Changchun, China
| | - Yijin Zhuang
- 1The First Hospital of Jilin University, Changchun, China
| | - Xiu Wang
- 1The First Hospital of Jilin University, Changchun, China
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10
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Snyder GM. Introduction to Transmission of Infection: Potential Agents Transmitted by Endoscopy. Gastrointest Endosc Clin N Am 2020; 30:611-618. [PMID: 32891220 DOI: 10.1016/j.giec.2020.05.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Pathogen contamination of endoscopes depends on pathogen factors, surface factors, and environmental conditions. The most common pathogens associated with transmission and infections associated with gastrointestinal endoscope contamination are Klebsiella pneumoniae, Escherichia coli, and Pseudomonas aeruginosa. Biofilm production together with disruption to device surfaces play an outsized role in the risk of contamination. Sampling schemes are limited by these factors, and further developments are needed to improve the accuracy of sampling.
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Affiliation(s)
- Graham M Snyder
- Department of Infection Control and Hospital Epidemiology, University of Pittsburgh Medical Center, Pittsburgh, PA, USA; Division of Infectious Diseases, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.
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11
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Raphael KL, McNoble E, Goldbeck J, Stiles M, Miller LS, Trindade AJ. Remote video auditing in the endoscopy unit for evaluation of duodenoscope reprocessing in a tertiary care center. Endoscopy 2020; 52:864-870. [PMID: 32408362 DOI: 10.1055/a-1157-8861] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
BACKGROUND : A significant proportion of duodenoscope-transmitted infections have resulted from errors related to reprocessing. Remote video auditing (RVA) is a tool that can monitor reprocessing compliance but it has not been previously evaluated in a tertiary care setting. The aims of this study were to evaluate: 1) RVA feasibility in a tertiary care setting (defined as the ability to audit every step of duodenoscope reprocessing without delaying the next procedure due to unavailability of duodenoscopes); and 2) the use of RVA as a compliance monitoring tool. METHODS : This was a prospective study at a tertiary care center. A video camera with offsite monitoring was installed in March 2018. Auditors delivered a compliance score after each procedure. The duodenoscope was not used until it passed the audit. Feasibility and compliance data were collected from April 2018 to August 2019 after a 1-month run-in phase. Both per-step compliance and overall 100 % compliance rates were measured. RESULTS : Of 743 duodenoscope reprocessing procedures, 32 666 individual steps were audited and 99.9 % of the steps were fully viewable. The mean time per audit was 38.3 minutes, the mean duodenoscope turnover time was 76.1 minutes, and there were no delays to the next procedure due to unavailability of duodenoscopes. The per-step compliance rate was 99.5 % but the overall 100 % compliance rate was 90.3 %. CONCLUSIONS : The use of RVA in duodenoscope reprocessing was feasible and promoted sustained high-level compliance in a tertiary care center.
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Affiliation(s)
- Kara L Raphael
- Division of Gastroenterology, Zucker School of Medicine at Hofstra/Northwell, Long Island Jewish Medical Center, Northwell Health System, New Hyde Park, New York, United States
| | - Ellen McNoble
- Perioperative Patient Care Services, Zucker School of Medicine at Hofstra/Northwell, Long Island Jewish Medical Center, Northwell Health System, New Hyde Park, New York, United States
| | - Jessica Goldbeck
- Hospital Administration, Zucker School of Medicine at Hofstra/Northwell, Long Island Jewish Medical Center, Northwell Health System, New Hyde Park, New York, United States
| | - Megan Stiles
- Hospital Administration, Zucker School of Medicine at Hofstra/Northwell, Long Island Jewish Medical Center, Northwell Health System, New Hyde Park, New York, United States
| | - Larry S Miller
- Division of Gastroenterology, Zucker School of Medicine at Hofstra/Northwell, Long Island Jewish Medical Center, Northwell Health System, New Hyde Park, New York, United States
| | - Arvind J Trindade
- Division of Gastroenterology, Zucker School of Medicine at Hofstra/Northwell, Long Island Jewish Medical Center, Northwell Health System, New Hyde Park, New York, United States
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12
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Ridtitid W, Pakvisal P, Chatsuwan T, J Kerr S, Tiankanon K, Piyachaturawat P, Mekaroonkamol P, Kongkam P, Rerknimitr R. A newly designed duodenoscope with detachable distal cap significantly reduces organic residue contamination after reprocessing. Endoscopy 2020; 52:754-760. [PMID: 32299115 DOI: 10.1055/a-1145-3562] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
BACKGROUND A newly designed duodenoscope with detachable distal cap may reduce bacterial contamination by allowing better access to the elevator. We compared bacterial contamination and organic residue evaluated by rapid adenosine triphosphate (ATP) test and culture from duodenoscopes with detachable vs. fixed distal caps after high-level disinfection (HLD). METHODS During December 2018-April 2019, 108 used newly designed duodenoscopes were enrolled. In group A (n = 54), the distal cap of the duodenoscope was detached before manual cleaning. In group B (n = 54), the distal cap was not detached. After HLD, samples were collected from the elevator, submitted for culture, and evaluated using the ATP test, using the cutoff value of 40 relative light units (RLUs). RESULTS After HLD, the proportion of potential bacterial contamination and organic residue in group A was significantly lower than in group B (37.0 % vs. 75.9 %; P < 0.001; relative risk 0.49, 95 % confidence interval 0.33-0.71), and also confirmed by median ATP values (45.2 vs. 141.0 RLU; P < 0.001). In group B, one sample culture was positive for nonpathogenic bacteria. Pathogenic bacteria were not found in any culture from either group. CONCLUSIONS The detachable distal cap was more effective at eliminating bacterial contamination and reducing organic residue than a fixed cap. Nonpathogenic bacteria were detected in the fixed cap group after reprocessing. The ATP test with 40 RLU cutoff is a practical method to ensure the cleanliness of duodenoscope reprocessing without the need to wait for bacterial culture results.
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Affiliation(s)
- Wiriyaporn Ridtitid
- Division of Gastroenterology, Faculty of Medicine, Chulalongkorn University and King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok, Thailand.,Center of Excellence for Innovation and Endoscopy in Gastrointestinal Oncology, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
| | - Piyapoom Pakvisal
- Division of Gastroenterology, Faculty of Medicine, Chulalongkorn University and King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok, Thailand
| | - Tanittha Chatsuwan
- Department of Microbiology, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
| | - Stephen J Kerr
- Biostatistics Excellence Center, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
| | - Kasenee Tiankanon
- Division of Gastroenterology, Faculty of Medicine, Chulalongkorn University and King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok, Thailand
| | - Panida Piyachaturawat
- Division of Gastroenterology, Faculty of Medicine, Chulalongkorn University and King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok, Thailand
| | - Parit Mekaroonkamol
- Division of Gastroenterology, Faculty of Medicine, Chulalongkorn University and King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok, Thailand
| | - Pradermchai Kongkam
- Division of Gastroenterology, Faculty of Medicine, Chulalongkorn University and King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok, Thailand.,Center of Excellence for Innovation and Endoscopy in Gastrointestinal Oncology, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
| | - Rungsun Rerknimitr
- Division of Gastroenterology, Faculty of Medicine, Chulalongkorn University and King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok, Thailand.,Center of Excellence for Innovation and Endoscopy in Gastrointestinal Oncology, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
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13
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Braun BI, Chitavi SO, Perkins KM, Perz JF, Link-Gelles R, Hoppe J, Donofrio KM, Shen Y, Garcia-Houchins S. Referrals of Infection Control Breaches to Public Health Authorities: Ambulatory Care Settings Experience, 2017. Jt Comm J Qual Patient Saf 2020; 46:531-541. [PMID: 32600952 DOI: 10.1016/j.jcjq.2020.05.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Revised: 05/04/2020] [Accepted: 05/14/2020] [Indexed: 11/20/2022]
Abstract
BACKGROUND Beginning in October 2016, the Centers for Medicare & Medicaid Services (CMS) issued expanded guidance requiring accrediting organizations and state survey agencies to report serious infection control breaches to relevant state health departments. This project sought to characterize and summarize The Joint Commission's early experiences and findings in applying this guidance to facilities accredited under the ambulatory and office-based surgery programs in 2017. METHODS Surveyor notes were retrospectively reviewed to identify individual breaches, and then the Centers for Disease Control and Prevention's Infection Prevention Checklist for Outpatient Settings was used to categorize and code documented breaches. RESULTS Of 845 ambulatory organizations, 39 (4.6%) had breaches observed during the survey process and reported to health departments. Within these organizations, surveyors documented 356 breaches, representing 52 different breach codes. Common breach domains were sterilization of reusable devices, device reprocessing observation, device reprocessing, disinfection of reusable devices, and infection control program and infrastructure. Eight of the 39 facilities (20.5%) were cited for not performing the minimum level of reprocessing based on the items' intended use, reusing single-use devices, and/or not using aseptic technique to prepare injections. CONCLUSION The CMS infection control breach reporting requirement has helped highlight some of the challenges faced by ambulatory facilities in providing a safe care environment for their patients. This analysis identified numerous opportunities for improved staff training and competencies as well as leadership oversight and investment in necessary resources. More systematic assessments of infection control practices, extending to both accredited and nonaccredited ambulatory facilities, are needed to inform oversight and prevention efforts.
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14
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Wiktorczyk N, Kwiecińska‐Piróg J, Skowron K, Michalska A, Zalas‐Więcek P, Białucha A, Budzyńska A, Grudlewska‐Buda K, Prażyńska M, Gospodarek‐Komkowska E. Assessment of endoscope cleaning and disinfection efficacy, and the impact of endoscope storage on the microbiological safety level. J Appl Microbiol 2020; 128:1503-1513. [DOI: 10.1111/jam.14558] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Revised: 12/06/2019] [Accepted: 12/16/2019] [Indexed: 01/11/2023]
Affiliation(s)
- N. Wiktorczyk
- Department of Microbiology Nicolaus Copernicus University in Toruń Collegium Medicum of L. Rydygier Bydgoszcz Poland
| | - J. Kwiecińska‐Piróg
- Department of Microbiology Nicolaus Copernicus University in Toruń Collegium Medicum of L. Rydygier Bydgoszcz Poland
| | - K. Skowron
- Department of Microbiology Nicolaus Copernicus University in Toruń Collegium Medicum of L. Rydygier Bydgoszcz Poland
| | - A. Michalska
- Department of Microbiology Nicolaus Copernicus University in Toruń Collegium Medicum of L. Rydygier Bydgoszcz Poland
| | - P. Zalas‐Więcek
- Department of Microbiology Nicolaus Copernicus University in Toruń Collegium Medicum of L. Rydygier Bydgoszcz Poland
| | - A. Białucha
- Department of Microbiology Nicolaus Copernicus University in Toruń Collegium Medicum of L. Rydygier Bydgoszcz Poland
| | - A. Budzyńska
- Department of Microbiology Nicolaus Copernicus University in Toruń Collegium Medicum of L. Rydygier Bydgoszcz Poland
| | - K. Grudlewska‐Buda
- Department of Microbiology Nicolaus Copernicus University in Toruń Collegium Medicum of L. Rydygier Bydgoszcz Poland
| | - M. Prażyńska
- Department of Microbiology Nicolaus Copernicus University in Toruń Collegium Medicum of L. Rydygier Bydgoszcz Poland
| | - E. Gospodarek‐Komkowska
- Department of Microbiology Nicolaus Copernicus University in Toruń Collegium Medicum of L. Rydygier Bydgoszcz Poland
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15
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Santos LCS, Parvin F, Huizer-Pajkos A, Wang J, Inglis DW, Andrade D, Hu H, Vickery K. Contribution of usage to endoscope working channel damage and bacterial contamination. J Hosp Infect 2020; 105:176-182. [PMID: 32169614 DOI: 10.1016/j.jhin.2020.03.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Accepted: 03/04/2020] [Indexed: 12/20/2022]
Abstract
BACKGROUND Biofilm formation has been shown to be associated with damaged areas of endoscope channels. It was hypothesized that the passage of instruments and brushes through endoscope channels during procedures and cleaning contributes to channel damage, bacterial attachment and biofilm formation. AIM To compare surface roughness and bacterial attachment in used and new endoscope channels in vivo and in vitro. METHODS Surface roughness of 10 clinically used (retired) and seven new colonoscope biopsy channels was analysed by a surface profiler. For the in-vitro study, a flexible endoscope biopsy forceps was passed repeatedly through a curved 3.0-mm-diameter Teflon tube 100, 200 and 500 times. Atomic force microscopy was used to determine the degree of inner surface damage. The number of Escherichia coli or Enterococcus faecium attached to the inner surface of the new Teflon tube and the tube with 500 forceps passes in 1 h at 37oC was determined by culture. RESULTS The average surface roughness of the used biopsy channels was found to be 1.5 times greater than that of the new biopsy channels (P=0.03). Surface roughness of Teflon tubes with 100, 200 and 500 forceps passes was 1.05-, 1.12- and 3.2-fold (P=0.025) greater than the roughness of the new Teflon tubes, respectively. The number of E. coli and E. faecium attached to Teflon tubes with 500 forceps passes was 2.9-fold (P=0.021) and 4.3-fold (P=0.004) higher compared with the number of E. coli and E. faecium attached to the new Teflon tubes, respectively. CONCLUSION An association was found between endoscope usage with damage to the biopsy channel and increased bacterial attachment.
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Affiliation(s)
- L C S Santos
- Surgical Infection Research Group, Faculty of Medicine and Health Sciences, Macquarie University, Sydney, Australia; Ribeirao Preto Nursing School, Sao Paulo University, Ribeirao Preto, Sao Paulo, Brazil
| | - F Parvin
- Surgical Infection Research Group, Faculty of Medicine and Health Sciences, Macquarie University, Sydney, Australia
| | - A Huizer-Pajkos
- Surgical Infection Research Group, Faculty of Medicine and Health Sciences, Macquarie University, Sydney, Australia
| | - J Wang
- Surgical Infection Research Group, Faculty of Medicine and Health Sciences, Macquarie University, Sydney, Australia
| | - D W Inglis
- School of Engineering, Macquarie University, Sydney, Australia
| | - D Andrade
- Ribeirao Preto Nursing School, Sao Paulo University, Ribeirao Preto, Sao Paulo, Brazil
| | - H Hu
- Surgical Infection Research Group, Faculty of Medicine and Health Sciences, Macquarie University, Sydney, Australia
| | - K Vickery
- Surgical Infection Research Group, Faculty of Medicine and Health Sciences, Macquarie University, Sydney, Australia.
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16
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Cristina ML, Sartini M, Schinca E, Ottria G, Dupont C, Bova P, Coccia G, Casini B, Spagnolo AM. Is Post-Reprocessing Microbiological Surveillance of Duodenoscopes Effective in Reducing the Potential Risk in Transmitting Pathogens? INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2019; 17:ijerph17010140. [PMID: 31878150 PMCID: PMC6982321 DOI: 10.3390/ijerph17010140] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Revised: 12/16/2019] [Accepted: 12/19/2019] [Indexed: 12/20/2022]
Abstract
Background: The use of a contaminated endoscope may lead to infections due to the transmission of potential pathogens from patient to patient. Methods: Post-reprocessing microbiological surveillance of four duodenoscopes was carried out over a three-year period in the Digestive Endoscopy Unit of an Italian hospital. Sampling of duodenoscopes was performed after the devices have been reprocessed. The initial phase of surveillance involved the contemporary evaluation of the four duodenoscopes; afterwards, microbiological surveillance proceeded at monthly intervals. Results: The initial phase of surveillance revealed that three duodenoscopes presented a high level of contamination with “high-concern” micro-organisms, some of which were multi-drug-resistant. The highest values of contamination regarded the species P. aeruginosa (2500 CFU/duodenoscope), K. pneumoniae (2580 CFU/duodenoscope), and A. baumannii (2600 CFU/duodenoscope). Since the cultures were repeatedly positive on three successive occasions, the contaminated devices were sent to the manufacturer for evaluation. Audits were carried out with the personnel responsible for reprocessing, which was aimed to optimize the procedures used, and subsequently, only one case of non-conformity was found. Conclusions: Our study highlighted both the potential risk of transmitting pathogens through the use of duodenoscopes and the importance of implementing a well-structured system of microbiological surveillance and training programs, in order to reduce the risk of spreading retrograde cholangiopancreatography (ERCP)-associated infections.
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Affiliation(s)
- Maria Luisa Cristina
- Department of Health Sciences, University of Genova, Via Pastore 1, 16132 Genova, Italy; (M.L.C.); (E.S.); (G.O.); (C.D.); (A.M.S.)
- S.S.D. U.O. Hospital Hygiene, E.O. Ospedali Galliera, 16128 Genova, Italy
| | - Marina Sartini
- Department of Health Sciences, University of Genova, Via Pastore 1, 16132 Genova, Italy; (M.L.C.); (E.S.); (G.O.); (C.D.); (A.M.S.)
- S.S.D. U.O. Hospital Hygiene, E.O. Ospedali Galliera, 16128 Genova, Italy
- Correspondence:
| | - Elisa Schinca
- Department of Health Sciences, University of Genova, Via Pastore 1, 16132 Genova, Italy; (M.L.C.); (E.S.); (G.O.); (C.D.); (A.M.S.)
- S.S.D. U.O. Hospital Hygiene, E.O. Ospedali Galliera, 16128 Genova, Italy
| | - Gianluca Ottria
- Department of Health Sciences, University of Genova, Via Pastore 1, 16132 Genova, Italy; (M.L.C.); (E.S.); (G.O.); (C.D.); (A.M.S.)
- S.S.D. U.O. Hospital Hygiene, E.O. Ospedali Galliera, 16128 Genova, Italy
| | - Chiara Dupont
- Department of Health Sciences, University of Genova, Via Pastore 1, 16132 Genova, Italy; (M.L.C.); (E.S.); (G.O.); (C.D.); (A.M.S.)
| | - Palmira Bova
- S.C. Gastroenterology, E.O. Ospedali Galliera, 16128 Genova, Italy; (P.B.); (G.C.)
| | - Gianni Coccia
- S.C. Gastroenterology, E.O. Ospedali Galliera, 16128 Genova, Italy; (P.B.); (G.C.)
| | - Beatrice Casini
- Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, 56126 Pisa, Italy;
| | - Anna Maria Spagnolo
- Department of Health Sciences, University of Genova, Via Pastore 1, 16132 Genova, Italy; (M.L.C.); (E.S.); (G.O.); (C.D.); (A.M.S.)
- S.S.D. U.O. Hospital Hygiene, E.O. Ospedali Galliera, 16128 Genova, Italy
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17
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Reyes J, Aguilar AC, Caicedo A. Carbapenem-Resistant Klebsiella pneumoniae: Microbiology Key Points for Clinical Practice. Int J Gen Med 2019; 12:437-446. [PMID: 31819594 PMCID: PMC6886555 DOI: 10.2147/ijgm.s214305] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Accepted: 10/24/2019] [Indexed: 01/20/2023] Open
Abstract
Carbapenemase–producing Klebsiella pneumoniae strains (Cp-Kpn) represent a challenge for clinical practitioners due to their increasing prevalence in hospital settings and antibiotic resistance. Clinical practitioners are often overwhelmed by the extensive list of publications regarding Cp-Kpn infections, treatment, characteristics, identification, and diagnosis. In this perspective article, we provide key points for clinical practitioners to consider for improved patient management including identification of risk factors and strategies for treatment. Additionally, we also discuss genetic underpinnings of antibiotic resistance, implementation of an antimicrobial stewardship program (ASP), and use of automated systems for detection of Cp-Kpn. Collectively, implementation of such key points would enhance clinical practices through providing practical knowledge to health professionals worldwide.
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Affiliation(s)
- Jorge Reyes
- Colegio de Ciencias Biológicas y Ambientales, Instituto de Microbiología, Universidad San Francisco de Quito (USFQ), Quito 17-09-01, Ecuador.,Facultad de Ciencias Químicas, Universidad Central del Ecuador, Quito, Ecuador
| | - Ana Cristina Aguilar
- Colegio de Ciencias Biológicas y Ambientales, Instituto de Microbiología, Universidad San Francisco de Quito (USFQ), Quito 17-09-01, Ecuador.,Colegio de Ciencias de la Salud (COCSA), Escuela de Medicina, Universidad San Francisco de Quito (USFQ), Quito 17-12-841, Ecuador
| | - Andrés Caicedo
- Colegio de Ciencias Biológicas y Ambientales, Instituto de Microbiología, Universidad San Francisco de Quito (USFQ), Quito 17-09-01, Ecuador.,Colegio de Ciencias de la Salud (COCSA), Escuela de Medicina, Universidad San Francisco de Quito (USFQ), Quito 17-12-841, Ecuador.,Sistemas Médicos (SIME), Universidad San Francisco de Quito (USFQ), Quito 17-12-841, Ecuador
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18
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Ditommaso S, Giacomuzzi M, Cipriani R, Zaccaria T, Cavallo R, Boggio V, Albera R, Zotti CM. Using Microbiological Sampling to Evaluate the Efficacy of Nasofibroscope Disinfection: The Tristel Trio Wipes System in Ear-Nose-Throat (ENT) Endoscopy. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2019; 16:ijerph16224583. [PMID: 31752418 PMCID: PMC6887787 DOI: 10.3390/ijerph16224583] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Revised: 11/15/2019] [Accepted: 11/15/2019] [Indexed: 12/04/2022]
Abstract
Disinfection and sterilization are needed for guaranteeing that medical and surgical instruments do not spread contagious microorganisms to patients. The aim of this study was to evaluate the efficacy of a simple manual technique of high-level disinfection (HLD) of flexible fiberoptic nasofibroscopes (FFNs) with wipes impregnated with a chlorine dioxide solution (Tristel Trio Wipes System—TTW) against a conventional automated washer machine (Soluscope ENT, Cimrex 12—AW). FFNs used in 62 patients undergoing endoscopy at an ENT clinic were sampled according to an aseptic procedure. For each nasoendoscopy, microbiological samples were taken at two times: (1) after a patient’s nasoendoscopy and (2) immediately after high-level disinfection. Ten microliters of each prepared sample were inoculated onto specific culture media for the detection of nasopharyngeal flora microorganisms. The microbiological results obtained from 62 post-disinfection samples revealed bacterial growth on two FFNs disinfected with AW, and five FFNs disinfected with TTW, but this difference is not statistically significant. None of the isolates were pathogenic bacteria. Our results are different than the results obtained by two previously published studies on the TTW system. In both studies, sampling was carried out by swabbing the tip and the handle surface of FFNs. This sampling method was the least effective method means of detecting bacteria on a surface. It can be concluded that the two disinfection systems allow providers to obtain a reduction of the saprophytic and pathogenic microbial load.
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Affiliation(s)
- Savina Ditommaso
- Department of Public Health and Pediatrics, University of Turin, 10126 Turin, Italy; (M.G.); (C.M.Z.)
- Correspondence: ; Tel.: +39116705841
| | - Monica Giacomuzzi
- Department of Public Health and Pediatrics, University of Turin, 10126 Turin, Italy; (M.G.); (C.M.Z.)
| | - Raffaella Cipriani
- Laboratory of Microbiology and Virology, Città della Salute e della Scienza Hospital, 10126 Turin, Italy; (R.C.); (T.Z.)
| | - Teresa Zaccaria
- Laboratory of Microbiology and Virology, Città della Salute e della Scienza Hospital, 10126 Turin, Italy; (R.C.); (T.Z.)
| | - Rossana Cavallo
- Department of Public Health and Pediatrics, University of Turin, Laboratory of Microbiology and Virology, Città della Salute e della Scienza Hospital, 10126 Turin, Italy;
| | - Valeria Boggio
- Department of Surgical Sciences, Otolaryngology Unit, University of Turin, 10126 Turin, Italy; (V.B.); (R.A.)
| | - Roberto Albera
- Department of Surgical Sciences, Otolaryngology Unit, University of Turin, 10126 Turin, Italy; (V.B.); (R.A.)
| | - Carla M. Zotti
- Department of Public Health and Pediatrics, University of Turin, 10126 Turin, Italy; (M.G.); (C.M.Z.)
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Pletz MW, Wollny A, Dobermann UH, Rödel J, Neubauer S, Stein C, Brandt C, Hartung A, Mellmann A, Trommer S, Edel B, Patchev V, Makarewicz O, Maschmann J. A Nosocomial Foodborne Outbreak of a VIM Carbapenemase-Expressing Citrobacter freundii. Clin Infect Dis 2019; 67:58-64. [PMID: 29346622 DOI: 10.1093/cid/ciy034] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Accepted: 01/13/2018] [Indexed: 11/12/2022] Open
Abstract
Background A foodborne outbreak of VIM carbapenemase-expressing Citrobacter freundii (CPC) occurred between February 2016 and June 2016 at a major university hospital in Germany. Methods An explosive increase in CPC isolated from rectal swabs of patients during weekly routine screening led to the declaration of an outbreak. A hospital-wide prevalence screening was initiated as well as screening of all patients on admission and before transfer to another ward, canteen staff, patient rooms, medical and kitchen inventory, and food. Swabs were streaked out on selective plates. All CPC isolates were analyzed using mass spectrometry, and selected isolates were analyzed using whole-genome sequencing. Results A total of 76 were identified; most were unrelated cases in different wards. The CPC was isolated from retained samples of prepared vegetable salads and puddings and from a mixing machine used to prepare these foods only after an overnight culture. The immediate ban on serving potential source food resulted in a sharp decline and finally disappearance of novel cases. Repeated testing of presliced vegetables showed a high degree of contamination with C. freundii without a carbapenemase, indicating a possible source. Conclusions An explosive increase in carbapenemase-expressing Enterobacteriaceae contamination may have been caused by a foodborne source, and presliced vegetables should be taken into account as a putative pathogen repository. These findings underline the importance of appropriate cooling, transport, reheating, and distribution of meals and indicate that probing of nonorganic surfaces is limited by low sensitivity, which may be increased by additional overnight cultivation in appropriate media.
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Affiliation(s)
- Mathias W Pletz
- Institute of Infectious Diseases and Infection Control, Germany
| | - Antje Wollny
- Institute of Infectious Diseases and Infection Control, Germany
| | | | - Jürgen Rödel
- Department of Medical Microbiology, Jena University Hospital, Germany
| | | | - Claudia Stein
- Institute of Infectious Diseases and Infection Control, Germany
| | | | - Anita Hartung
- Institute of Infectious Diseases and Infection Control, Germany
| | | | - Sabine Trommer
- Department IV-Family, Education & Welfare (Fachdienst Health), Jena City Council, Germany
| | - Birgit Edel
- Department of Medical Microbiology, Jena University Hospital, Germany
| | | | | | - Jens Maschmann
- Medical Executive Board, Jena University Hospital, Germany
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Hawken SE, Washer LL, Williams CL, Newton DW, Snitkin ES. Genomic Investigation of a Putative Endoscope-Associated Carbapenem-Resistant Enterobacter cloacae Outbreak Reveals a Wide Diversity of Circulating Strains and Resistance Mutations. Clin Infect Dis 2019; 66:460-463. [PMID: 29211819 DOI: 10.1093/cid/cix934] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Accepted: 10/25/2017] [Indexed: 11/12/2022] Open
Abstract
A genomic epidemiologic investigation of a putative carbapenem-resistant Enterobacter cloacae outbreak revealed few plausible instances of nosocomial transmission, highlighting instead the frequent importation of E. cloacae into our hospital. Searching for genetic determinants of carbapenem resistance demonstrated that most resistance is due to convergent mutations in phylogenetically diverse E. cloacae.
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Affiliation(s)
- Shawn E Hawken
- Department of Microbiology and Immunology, University of Michigan Medical School
| | - Laraine L Washer
- Department of Internal Medicine, Division of Infectious Diseases
| | | | - Duane W Newton
- Department of Pathology, University of Michigan Health System, Ann Arbor
| | - Evan S Snitkin
- Department of Microbiology and Immunology, University of Michigan Medical School.,Department of Internal Medicine, Division of Infectious Diseases
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Perumpail RB, Marya NB, McGinty BL, Muthusamy VR. Endoscope reprocessing: Comparison of drying effectiveness and microbial levels with an automated drying and storage cabinet with forced filtered air and a standard storage cabinet. Am J Infect Control 2019; 47:1083-1089. [PMID: 30962022 DOI: 10.1016/j.ajic.2019.02.016] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Revised: 02/12/2019] [Accepted: 02/12/2019] [Indexed: 01/14/2023]
Abstract
BACKGROUND Automated drying may help prevent endoscopically transmitted infections. We aimed to assess the efficacy of an automated drying and storage cabinet compared to a standard storage cabinet in achieving endoscope dryness postreprocessing and in reducing the risk of microbial growth. METHODS Drying times of bronchoscopes, colonoscopes, and duodenoscopes using 2 drying platforms (an automated drying and storage cabinet vs a standard storage cabinet) were measured using cobalt chloride paper. Drying assessments occurred at: 30 minutes, 1 hour, 2 hours, 3 hours, and 24 hours. A simple linear regression analysis compared rates of microbial growth after inoculation with Pseudomonas aeruginosa following high-level disinfection at: 0, 3 hours, 12 hours, 24 hours, and 48 hours. RESULTS Using the automated drying and storage cabinet, internal channels were dry at 1 hour and external surfaces at 3 hours in all endoscopes. With the standard storage cabinet, there was residual internal fluid at 24 hours, whereas external surfaces were dry at 24 hours. For bronchoscopes, colonoscopes, and duodenoscopes, the standard cabinet allowed for an average rate of colony forming unit growth of 8.1 × 106 per hour, 8.3 × 106 per hour, and 7.0 × 107 per hour, respectively; the automated cabinet resulted in colony forming unit growth at an average rate of -28.4 per hour (P = .02), -38.5 per hour (P = .01), and -200.2 per hour (P = .02), respectively. CONCLUSIONS An automated cabinet is advantageous for rapid drying of endoscope surfaces and in reducing the risk of microbial growth postreprocessing.
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22
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Ciccozzi M, Cella E, Lai A, De Florio L, Antonelli F, Fogolari M, Di Matteo FM, Pizzicannella M, Colombo B, Dicuonzo G, Angeletti S. Phylogenetic Analysis of Multi-Drug Resistant Klebsiella pneumoniae Strains From Duodenoscope Biofilm: Microbiological Surveillance and Reprocessing Improvements for Infection Prevention. Front Public Health 2019; 7:219. [PMID: 31448253 PMCID: PMC6691149 DOI: 10.3389/fpubh.2019.00219] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Accepted: 07/22/2019] [Indexed: 11/21/2022] Open
Abstract
Duodenoscopes have been described as potential vehicles of patient-to-patient transmission of multi-drug resistant organisms. Carbapenem-resistant Enterobacteriaceae duodenoscope related infections have been described by the Center for Disease Control and the US Food and Drug Administration consequently to outbreaks occurring in the United States. These evidences suggested that improved microbiological surveillance and endoscope design optimization could represent valid tools to improve infection control. At this aim, in this study an example of duodenoscope microbiological surveillance and reprocessing improvement analyzing strains component of bacterial biofilm by phylogenetic analysis has been proposed. From September 2016 to December 2017, duodenoscope instruments were subjected to microbial surveillance by post-reprocessing cultures of liquid collected by internal channels of instruments after injection and aspiration cycles and membrane filtration. During surveillance seventeen Klebsiella pneumoniae, of which 10/17 (58.8%) MDR and KPC strains were collected from duodenoscope instruments plus one MDR Klebsiella pneumoniae strain from the rectal swab performed before ERCP procedure in an inpatient. The surveillance allowed evidencing potential failure of reprocessing procedure and performing consequent reprocessing improvements including the contaminated instruments quarantine until their negativity. Phylogenetic analysis of whole genome sequence of duodenoscope strains plus inpatients MDR strains, showed intermixing between duodenoscopes and inpatients, as evidenced by minimum spanning tree and time-scale Maximum Clade Credibility tree. In minimum spanning tree, three groups have been evidenced. Group I including Klebsiella pneumoniae strains, isolated from inpatients before microbiological surveillance adoption; group II including intermixed Klebsiella pneumoniae strains isolated from inpatients and Klebsiella pneumoniae strains isolated from duedonoscopes and group III including Klebsiella pneumoniae strains exclusively from duedonoscope instruments. In the Maximum Credibility Tree, a statistically supported cluster including two Klebsiella pneumoniae strains from duedonoscope instruments and one strains isolated from an inpatient was showed. From the first microbiologic surveillance performed on September 2016 and after the reprocessing improvement adoption, none MDR or susceptible Klebsiella pneumoniae strain was isolated in the following surveillance periods. In conclusion, these results should encourage hospital board to perform microbiological surveillance of duodenoscopes as well as of patients, by rectal swabs culture, and rapid molecular testing for antimicrobial resistance before any endoscopic invasive procedure.
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Affiliation(s)
- Massimo Ciccozzi
- Unit of Medical Statistics and Molecular Epidemiology, University Campus Bio-Medico of Rome, Rome, Italy
| | - Eleonora Cella
- Department of Biomedical and Clinical Sciences "L. Sacco," University of Milan, Milan, Italy
| | - Alessia Lai
- Department of Biomedical and Clinical Sciences "L. Sacco," University of Milan, Milan, Italy
| | - Lucia De Florio
- Unit of Clinical Laboratory Science, University Campus Bio-Medico of Rome, Rome, Italy
| | - Francesca Antonelli
- Unit of Clinical Laboratory Science, University Campus Bio-Medico of Rome, Rome, Italy
| | - Marta Fogolari
- Unit of Clinical Laboratory Science, University Campus Bio-Medico of Rome, Rome, Italy
| | | | | | | | - Giordano Dicuonzo
- Healthcare Associated Infection Control Committee, University Campus Bio-Medico of Rome, Rome, Italy
| | - Silvia Angeletti
- Unit of Clinical Laboratory Science, University Campus Bio-Medico of Rome, Rome, Italy
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Muscarella LF. Use of ethylene-oxide gas sterilisation to terminate multidrug-resistant bacterial outbreaks linked to duodenoscopes. BMJ Open Gastroenterol 2019; 6:e000282. [PMID: 31423318 PMCID: PMC6688681 DOI: 10.1136/bmjgast-2019-000282] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Revised: 05/09/2019] [Accepted: 05/10/2019] [Indexed: 01/17/2023] Open
Abstract
Background Cleaning and high-level disinfection have been the standard in the USA and other countries for reprocessing flexible endoscopes, including duodenoscopes and other types of gastrointestinal endoscopes. For decades, this practice has been a cornerstone for infection prevention in the endoscopic setting. However, amid recent reports associating the use of duodenoscopes with infections and outbreaks of carbapenem-resistant Enterobacteriaceae (CRE) and related multidrug-resistant organisms (MDROs), reasonable questions about the adequacy of current practices for reprocessing duodenoscopes have emerged. Objectives To review and evaluate the adequacy of current reprocessing practices for preventing duodenoscopes from transmitting CRE and related MDROs. Methods The MEDLINE/PubMed database was searched to identify published cases associating confirmed (or suspected) infections of CRE or a related MDRO with exposure to a duodenoscope since 2012, when duodenoscopes became a recognised risk factor for the transmission of CRE. The Internet was also searched to identify news articles and other reports documenting eligible cases occurring during this same timeframe but not identified during the MEDLINE database’s search. The Food and Drug Administration’s (FDA) medical device database was queried to identify regulatory reports describing these same types of cases, also recorded since 2012. The clinical and reprocessing details of each eligible case were reviewed to identify (when possible): (a) the reprocessing method (eg, high-level disinfection) performed at the time of the infections, (b) whether the facility’s compliance with the manufacturer’s reprocessing instructions was confirmed, and (c) the measure(s) or corrective action(s) the facility implemented to prevent additional multidrug-resistant infections. Results Seventeen cases in the USA and six in other countries (primarily Europe) associating infections (and colonizations) of CRE or a related MDRO with exposure to a duodenoscope were reviewed. Fourteen of these 23 outbreaks were caused by CRE, and six by a related MDRO. Two of these six latter cases identified Klebsiella pneumoniae carrying the mcr-1 gene as the pathogen. For 12 of these 23 cases, it was reported or implied that the duodenoscope was being high-level disinfected at the time of the infections, consistent with published guidelines. For the remaining 11 cases, the associated report(s) did not clearly identify how the duodenoscope was being reprocessed at the time of the infections (although it may be reasonably concluded that at least some, if not all, of these 11 cases involved high-level disinfection). Further, eight of the 23 cases reported the duodenoscope was being reprocessed in accordance with the manufacturer’s instructions for use (and professional guidelines) at the time of the infections. Seven of the cases discussed the design of the duodenoscope (eg, the forceps elevator mechanism) in the context of reprocessing and the infections. Three of the cases identified one or more reprocessing lapses, including inadequate cleaning, delayed reprocessing and improper drying and/or storage of the duodenoscope. Most of these 23 cases were associated with exposure to a duodenoscope model featuring a sealed elevator-wire channel. Six of the cases reported adopting (or in one case supplementing high-level disinfection with) ethylene oxide (EO) gas sterilisation of the duodenoscope, with at least three reporting this measure terminated the outbreak. Other measures adopted to prevent additional infections included removing the implicated duodenoscope from use, re-training staff about proper cleaning, microbiological culturing of the duodenoscope and returning the duodenoscope to the manufacturer for evaluation, maintenance and/or repair. Conclusions This study's findings suggest current reprocessing practices may not always be sufficiently effective to prevent a duodenoscope from transmitting CRE and related MDROs, at least in some circumstances including an outbreak setting. Factors this review identified that may contribute to the device remaining contaminated after reprocessing include the device’s design; breaches of recommended reprocessing guidelines (eg, inadequate manual cleaning, delayed reprocessing or improper device storage); damage to the device; lacking servicing, maintenance or repair; and/or the presence of biofilms. Measures that can mitigate the impact of these and other reprocessing challenges and reduce, if not eliminate, the risk of transmission of CRE or a related MDRO by a duodenoscope include the use of EO gas sterilization (or another comparably effective process or method). In 2015, the FDA suggested healthcare facilities consider performing at least one of four supplemental measures, which include EO gas sterilisation, to improve the effectiveness of duodenoscope reprocessing. Whether the FDA and Centers for Disease Control and Prevention might reclassify duodenoscopes as critical devices requiring sterilisation is currently unresolved.
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Abstract
Hypervirulent K. pneumoniae (hvKp) is an evolving pathotype that is more virulent than classical K. pneumoniae (cKp). hvKp usually infects individuals from the community, who are often healthy. Infections are more common in the Asian Pacific Rim but are occurring globally. hvKp infection frequently presents at multiple sites or subsequently metastatically spreads, often requiring source control. hvKp has an increased ability to cause central nervous system infection and endophthalmitis, which require rapid recognition and site-specific treatment. The genetic factors that confer hvKp's hypervirulent phenotype are present on a large virulence plasmid and perhaps integrative conjugal elements. Increased capsule production and aerobactin production are established hvKp-specific virulence factors. Similar to cKp, hvKp strains are becoming increasingly resistant to antimicrobials via acquisition of mobile elements carrying resistance determinants, and new hvKp strains emerge when extensively drug-resistant cKp strains acquire hvKp-specific virulence determinants, resulting in nosocomial infection. Presently, clinical laboratories are unable to differentiate cKp from hvKp, but recently, several biomarkers and quantitative siderophore production have been shown to accurately predict hvKp strains, which could lead to the development of a diagnostic test for use by clinical laboratories for optimal patient care and for use in epidemiologic surveillance and research studies.
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Affiliation(s)
- Thomas A Russo
- Department of Medicine, University at Buffalo-State University of New York, Buffalo, New York, USA
- Department of Microbiology and Immunology, University at Buffalo-State University of New York, Buffalo, New York, USA
- The Witebsky Center for Microbial Pathogenesis, University at Buffalo-State University of New York, Buffalo, New York, USA
- The Veterans Administration Western New York Healthcare System, Buffalo, New York, USA
| | - Candace M Marr
- Department of Medicine, University at Buffalo-State University of New York, Buffalo, New York, USA
- Erie County Medical Center, Buffalo, New York, USA
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25
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Azimirad M, Alebouyeh M, Sadeghi A, Khodamoradi E, Aghdaei HA, Mohammad Alizadeh AH, Zali MR. Bioburden and transmission of pathogenic bacteria through elevator channel during endoscopic retrograde cholangiopancreatography: application of multiple-locus variable-number tandem-repeat analysis for characterization of clonal strains. Expert Rev Med Devices 2019; 16:413-420. [PMID: 30957585 DOI: 10.1080/17434440.2019.1604215] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
OBJECTIVES Endogenous and exogenous infection of the biliary tract could occur during endoscopic retrograde cholangiopancreatography. METHODS Bile samples of patients with hepatobiliary diseases, and swab samples of elevator channel samples of duodenoscope and washing instruments were prepared simultaneously and cultured aerobically and anaerobically. Antimicrobial susceptibility of the most common characterized bacterial species was tested, and their genetic relatedness was analyzed by multiple locus variable number of tandem repeats method. RESULTS Contamination with Pseudomonas aeruginosa was detected in 38.2% of the elevator channels' and 26.6% of the bile samples. Staphylococcus aureus, Enterococcus spp., Staphylococcus epidermidis, Escherichia coli, Enterobacter spp., and Clostridium perfringenes were among other bacterial isolates in the elevator channel swab samples. Highest antimicrobial resistance rate among P. aeruginosa isolates from the bile and swab samples were detected against gentamicin (100% and 73%, respectively), while the lowest one was measured to piperacillin-tazobactam (25% and 0%, respectively). Out of the 27 distinct MLVA profiles, relatedness of P. aeruginosa strains in the bile samples compared with those from the elevators was shown in three series of the samples. CONCLUSION Identity of P. aeruginosa strains among the bile and elevator channel samples showed possibility of cross-contamination among patients even at distinct time intervals. Expert opinion: Bacterial infection is considered as main complications of ERCP. Entry of bacteria into the biliary tract via contaminated device and its related instruments and their proliferation in this tissue could cause serious infections. To prevent this side effect, reprocessing of medical equipment via standard cleaning and disinfection procedures are needed. Our results showed incompliance of methods used for endoscope cleaning and disinfection procedure. Although host risk factors, such as sphincterotomy, could increase rate of infection with different types of bacteria, their ability for formation of biofilm and spore, which could help them to resist disinfectants and washing procedures seems to be main cause of persistent colonization and transmission among different patients. New standards for disinfection compared with currently used methods and use of materials to eliminate formation of bacterial microcolonies seem to be necessary to prevent cross-contamination.
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Affiliation(s)
- Masoumeh Azimirad
- a Foodborne and Waterborne Diseases Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences , Tehran , Iran.,b Gastroenterology and Liver Diseases Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences , Tehran , Iran
| | - Masoud Alebouyeh
- a Foodborne and Waterborne Diseases Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences , Tehran , Iran.,c Pediatric Infections Research Center, Research Institute for Children's Health, Shahid Beheshti University of Medical Sciences , Tehran , Iran
| | - Amir Sadeghi
- b Gastroenterology and Liver Diseases Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences , Tehran , Iran
| | - Elham Khodamoradi
- a Foodborne and Waterborne Diseases Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences , Tehran , Iran
| | - Hamid Asadzadeh Aghdaei
- d Basic and Molecular Epidemiology of Gastrointestinal Disorders Research Center, Research Institute for Gastroenterology and Live Diseases, Shahid Beheshti University of Medical Sciences , Tehran
| | - Amir Houshang Mohammad Alizadeh
- b Gastroenterology and Liver Diseases Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences , Tehran , Iran
| | - Mohammad Reza Zali
- b Gastroenterology and Liver Diseases Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences , Tehran , Iran
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Devereaux BM, Athan E, Brown RR, Greig SM, Jones DM, Bailey FK, Wallis DJ, Singh R. Australian infection control in endoscopy consensus statements on carbapenemase-producing Enterobacteriaceae. J Gastroenterol Hepatol 2019; 34:650-658. [PMID: 30345549 DOI: 10.1111/jgh.14511] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/22/2018] [Accepted: 10/14/2018] [Indexed: 01/27/2023]
Abstract
Outbreaks of carbapenemase-producing Enterobacteriaceae clinical infections related to endoscopic transmission are well documented. The high morbidity and mortality associated with these infections emphasizes the need to reassess endoscopic reprocessing protocols. The Gastroenterological Society of Australia established a multi-society committee to formulate evidence-based consensus statements on the prevention and management of endoscopic transmission of carbapenemase-producing Enterobacteriaceae. A literature search was undertaken utilizing the MEDLINE database. Further references were sourced from published paper bibliographies. Nine statements were formulated. Using the Delphi methodology, the statements were initially reviewed electronically by the committee members and subsequently at a face-to-face meeting in Melbourne, Australia. After further discussion, four additional sub-statements were added resulting in a total of 13 statements. Each statement was assessed for level of evidence, recommendation grade and the voting on recommendation was recorded. For a statement to be accepted, five out of six committee members had to "accept completely" or "accept with some reservation." All 13 statements achieved consensus agreement. Eleven statements achieved 100% "accepted completely." Two statements were 83% "accepted completely" and 17% "accepted with some reservation." Of particular significance, automated flexible endoscope reprocessors were mandated for high-level disinfection, and the use of forced-air drying cabinets was mandated for endoscope storage. These evidence-based statements encourage preventative strategies with the aim of ensuring the highest possible standards in flexible endoscope reprocessing thereby optimizing patient safety. They must be considered in addition to the broader published guidelines on infection control in endoscopy.
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Affiliation(s)
- Benedict M Devereaux
- University of Queensland, Herston, Queensland, Australia.,Gastroenterological Society of Australia (GESA), Melbourne, Victoria, Australia
| | - Eugene Athan
- Deakin University, Geelong, Victoria, Australia.,Australasian Society for Infectious Diseases (ASID), Surrey Hills, NSW, Australia
| | - Robyn R Brown
- Gastroenterological Nurses College of Australia (GENCA), Beaumaris, Victoria, Australia
| | - Sue M Greig
- Australasian College for Infection Prevention and Control (ACIPC), Brisbane, Tasmania, Australia
| | - Dianne M Jones
- Gastroenterological Nurses College of Australia (GENCA), Beaumaris, Victoria, Australia
| | - Fiona K Bailey
- Gastroenterological Society of Australia (GESA), Melbourne, Victoria, Australia
| | - David J Wallis
- Gastroenterological Society of Australia (GESA), Melbourne, Victoria, Australia
| | - Rajvinder Singh
- Gastroenterological Society of Australia (GESA), Melbourne, Victoria, Australia.,University of Adelaide, Adelaide, South Australia, Australia
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Rubin ZA, Kim S, Thaker AM, Muthusamy VR. Safely reprocessing duodenoscopes: current evidence and future directions. Lancet Gastroenterol Hepatol 2019; 3:499-508. [PMID: 29893234 DOI: 10.1016/s2468-1253(18)30122-5] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/08/2018] [Revised: 03/28/2018] [Accepted: 04/03/2018] [Indexed: 12/23/2022]
Abstract
Highly publicised outbreaks of various infections related to the use of duodenoscopes have increased public awareness of the once arcane and largely ignored subject of endoscope reprocessing. Since 2015, national professional societies, multiple federal agencies, and even the US Senate have written reports and guidelines on duodenoscope reprocessing. However, their recommendations are sometimes contradictory and difficult to implement, and new research on the topic is published regularly which further complicates the situation. With this flood of new and sometimes contradictory information, clinicians can feel confused about how to assure the safety of their patients undergoing duodenosocopy. This Review summarises the most salient current research on duodenoscope-associated outbreaks and reprocessing, and aims to provide clinicians with practical information applicable to their practice.
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Affiliation(s)
- Zachary A Rubin
- Division of Infectious Diseases, David Geffen School of Medicine at University of California, Los Angeles, CA, USA.
| | - Stephen Kim
- University of California Los Angeles Vatche & Tamar Manoukian Division of Digestive Diseases, David Geffen School of Medicine at University of California, Los Angeles, CA, USA
| | - Adarsh M Thaker
- University of California Los Angeles Vatche & Tamar Manoukian Division of Digestive Diseases, David Geffen School of Medicine at University of California, Los Angeles, CA, USA
| | - V Raman Muthusamy
- University of California Los Angeles Vatche & Tamar Manoukian Division of Digestive Diseases, David Geffen School of Medicine at University of California, Los Angeles, CA, USA
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Bhatt S, Mehta P, Chen C, Schneider CL, White LN, Chen HL, Kong MG. Efficacy of low-temperature plasma-activated gas disinfection against biofilm on contaminated GI endoscope channels. Gastrointest Endosc 2019; 89:105-114. [PMID: 30120959 DOI: 10.1016/j.gie.2018.08.009] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Accepted: 08/02/2018] [Indexed: 12/11/2022]
Abstract
BACKGROUND AND AIMS It has been increasingly recognized that the safety of GI endoscopes needs to be improved by addressing the small margin of safety of high-level disinfectants (HLDs) and the failure of HLDs to clear multidrug-resistant organisms and biofilms. There is also an unmet need for effective low-temperature sterilization techniques that have a clear pathway for U.S. Food and Drug Administration clearance. Here, we report the results of our investigation of a novel argon plasma-activated gas (PAG) for disinfection and potentially sterilization of biofilm-contaminated endoscopic channels. METHODS Test polytetrafluoroethylene channel segments were contaminated with 4-, 24- and 48-hour luminal biofilms of methicillin-resistant Staphylococcus aureus, Pseudomonas aeruginosa, or Escherichia coli and were treated by PAG flowing for up to 9 minutes. After PAG treatment, inactivation and dispersal of luminal bacterial biofilms and their regrowth in 48 hours were evaluated. Reactive species induced by PAG were measured with colorimetric probes and electron spin resonance spectrometry. Surface morphology and elemental composition of PAG-treated channel material were analyzed with scanning electron microscopy. RESULTS PAG treatment for 9 minutes led to more than 8 log reduction of viable cells and dispersal of 24- and 48-hour luminal biofilms of all 3 bacteria and to suppression of their regrowth, whereas it resulted in little morphologic abnormalities in channel material. Ozone concentration of PAG fell to below .01 ppm within 30 seconds of switching off the plasma. PAG-treated deionized water was acidified with numerous types of reactive species, each with a concentration some 3 orders of magnitude or more below its bacterial inhibition concentration. CONCLUSIONS PAG is capable of effectively and rapidly disinfecting luminal bacterial biofilms and offers an alternative to the step of HLDs and/or ethylene oxide in the endoscope reprocessing procedure with safety to personnel and environment.
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Affiliation(s)
- Sudhir Bhatt
- Center for Bioelectrics, Old Dominion University, Norfolk, Virginia, USA
| | - Poonam Mehta
- Center for Bioelectrics, Old Dominion University, Norfolk, Virginia, USA
| | - Chen Chen
- State Key Lab of Electrical Insulation and Power Equipment, Center for Plasma Biomedicine, Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | | | - Lauren N White
- Center for Bioelectrics, Old Dominion University, Norfolk, Virginia, USA
| | - Hai-Lan Chen
- Center for Bioelectrics, Old Dominion University, Norfolk, Virginia, USA
| | - Michael G Kong
- Center for Bioelectrics, Old Dominion University, Norfolk, Virginia, USA; Department of Electrical and Computer Engineering, Norfolk, Virginia, USA
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Bronchoscope-associated clusters of multidrug-resistant Pseudomonas aeruginosa and carbapenem-resistant Klebsiella pneumoniae. Infect Control Hosp Epidemiol 2018; 40:40-46. [PMID: 30451128 DOI: 10.1017/ice.2018.263] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
OBJECTIVE Recovery of multidrug-resistant (MDR) Pseudomonas aeruginosa and Klebsiella pneumoniae from a cluster of patients in the medical intensive care unit (MICU) prompted an epidemiologic investigation for a common exposure. METHODS Clinical and microbiologic data from MICU patients were retrospectively reviewed, MICU bronchoscopes underwent culturing and borescopy, and bronchoscope reprocessing procedures were reviewed. Bronchoscope and clinical MDR isolates epidemiologically linked to the cluster underwent molecular typing using pulsed-field gel electrophoresis (PFGE) followed by whole-genome sequencing. RESULTS Of the 33 case patients, 23 (70%) were exposed to a common bronchoscope (B1). Both MDR P. aeruginosa and K. pneumonia were recovered from the bronchoscope's lumen, and borescopy revealed a luminal defect. Molecular testing demonstrated genetic relatedness among case patient and B1 isolates, providing strong evidence for horizontal bacterial transmission. MDR organism (MDRO) recovery in 19 patients was ultimately linked to B1 exposure, and 10 of 19 patients were classified as belonging to an MDRO pseudo-outbreak. CONCLUSIONS Surveillance of bronchoscope-derived clinical culture data was important for early detection of this outbreak, and whole-genome sequencing was important for the confirmation of findings. Visualization of bronchoscope lumens to confirm integrity should be a critical component of device reprocessing.
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McCafferty CE, Aghajani MJ, Abi-Hanna D, Gosbell IB, Jensen SO. An update on gastrointestinal endoscopy-associated infections and their contributing factors. Ann Clin Microbiol Antimicrob 2018; 17:36. [PMID: 30314500 PMCID: PMC6182826 DOI: 10.1186/s12941-018-0289-2] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Accepted: 10/06/2018] [Indexed: 11/10/2022] Open
Abstract
INTRODUCTION During clinical use, gastrointestinal endoscopes are grossly contaminated with patient's native flora. These endoscopes undergo reprocessing to prevent infectious transmission upon future use. Endoscopy-associated infections and outbreaks have been reported, with a recent focus on the transmission of multi-drug resistant organisms. This review aims to provide an update on endoscopy-associated infections, and the factors contributing to their occurrence. METHODS PubMed, ScienceDirect, and CINAHL were searched for articles describing gastrointestinal endoscopy-associated infections and outbreaks published from 2008 to 2018. Factors contributing to their occurrence, and the outcomes of each outbreak were also examined. RESULTS This review found 18 articles, 16 of which described duodenoscope-associated infections, and the remaining two described colonoscope- and gastroscope-associated infection respectively. Outbreaks were reported from the United States, France, China, Germany, the Netherlands and the United Kingdom. The causative organisms reported were Klebsiella pneumoniae, Pseudomonas aeruginosa, Escherichia coli and Salmonella enteritidis. CONCLUSIONS A number of factors, including lapses in reprocessing, biofilm formation, endoscope design issues and endoscope damage, contribute to gastrointestinal endoscopy associated infection. Methods of improving endoscope reprocessing, screening for contamination and evaluating endoscope damage may be vital to preventing future infections and outbreaks.
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Affiliation(s)
- Charles Eugenio McCafferty
- Ingham Institute for Applied Medical Research, 1 Campbell Street, Sydney, NSW, 2560, Australia. .,Western Sydney University, School of Medicine, Sydney, 2560, Australia.
| | - Marra Jai Aghajani
- Ingham Institute for Applied Medical Research, 1 Campbell Street, Sydney, NSW, 2560, Australia.,Western Sydney University, School of Medicine, Sydney, 2560, Australia
| | - David Abi-Hanna
- Department of Gastroenterology and Hepatology, Liverpool Hospital, Sydney, 2170, Australia.,School of Medicine, University of New South Wales, Sydney, 2033, Australia
| | | | - Slade Owen Jensen
- Ingham Institute for Applied Medical Research, 1 Campbell Street, Sydney, NSW, 2560, Australia.,Western Sydney University, School of Medicine, Sydney, 2560, Australia
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Barakat MT, Girotra M, Huang RJ, Banerjee S. Scoping the scope: endoscopic evaluation of endoscope working channels with a new high-resolution inspection endoscope (with video). Gastrointest Endosc 2018; 88:601-611.e1. [PMID: 29425885 PMCID: PMC6078831 DOI: 10.1016/j.gie.2018.01.018] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/23/2017] [Accepted: 01/12/2018] [Indexed: 02/08/2023]
Abstract
BACKGROUND AND AIMS Outbreaks of transmission of infection related to endoscopy despite reported adherence to reprocessing guidelines warrant scrutiny of all potential contributing factors. Recent reports from ambulatory surgery centers indicated widespread significant occult damage within endoscope working channels, raising concerns regarding the potential detrimental impact of this damage on the adequacy of endoscope reprocessing. METHODS We inspected working channels of all 68 endoscopes at our academic institution using a novel flexible inspection endoscope. Inspections were recorded and videos reviewed by 3 investigators to evaluate and rate channel damage and/or debris. Working channel rinsates were obtained from all endoscopes, and adenosine triphosphate (ATP) bioluminescence was measured. RESULTS Overall endoscope working channel damage was rated as minimal and/or mild and was consistent with expected wear and tear (median 1.59 on our 5-point scale). Our predominant findings included superficial scratches (98.5%) and scratches with adherent peel (76.5%). No channel perforations, stains, or burns were detected. The extent of damage was not predicted by endoscope age. Minor punctate debris was common, and a few small drops of fluid were noted in 42.6% of endoscopes after reprocessing and drying. The presence of residual fluid predicted higher ATP bioluminescence values. The presence of visualized working channel damage or debris was not associated with elevated ATP bioluminescence values. CONCLUSION The flexible inspection endoscope enables high-resolution imaging of endoscope working channels and offers endoscopy units an additional modality for endoscope surveillance, potentially complementing bacterial cultures and ATP values. Our study, conducted in a busy academic endoscopy unit, indicated predominately mild damage to endoscope working channels, which did not correlate with elevated ATP values.
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Affiliation(s)
| | - Mohit Girotra
- Corresponding Author: Subhas Banerjee, MD, Division of Gastroenterology and Hepatology, Stanford University School of Medicine, 300 Pasteur Drive, MC 5244, Stanford, CA 94305, , phone: 650-723-2623, fax: 650-725-0705
| | - Robert J. Huang
- Corresponding Author: Subhas Banerjee, MD, Division of Gastroenterology and Hepatology, Stanford University School of Medicine, 300 Pasteur Drive, MC 5244, Stanford, CA 94305, , phone: 650-723-2623, fax: 650-725-0705
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Bassetti M, Righi E, Carnelutti A, Graziano E, Russo A. Multidrug-resistantKlebsiella pneumoniae: challenges for treatment, prevention and infection control. Expert Rev Anti Infect Ther 2018; 16:749-761. [DOI: 10.1080/14787210.2018.1522249] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Matteo Bassetti
- Department of Medicine, University of Udine and Azienda Sanitaria Universitaria Integrata, Udine, Italy
| | - Elda Righi
- Department of Medicine, University of Udine and Azienda Sanitaria Universitaria Integrata, Udine, Italy
| | - Alessia Carnelutti
- Department of Medicine, University of Udine and Azienda Sanitaria Universitaria Integrata, Udine, Italy
| | - Elena Graziano
- Department of Medicine, University of Udine and Azienda Sanitaria Universitaria Integrata, Udine, Italy
| | - Alessandro Russo
- Department of Medicine, University of Udine and Azienda Sanitaria Universitaria Integrata, Udine, Italy
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Pannek J, Gach J, Boratyński F, Olejniczak T. Antimicrobial activity of extracts and phthalides occurring in Apiaceae plants. Phytother Res 2018; 32:1459-1487. [PMID: 29732627 DOI: 10.1002/ptr.6098] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Revised: 03/07/2018] [Accepted: 03/24/2018] [Indexed: 12/26/2022]
Abstract
Apiaceae plants exhibit a broad spectrum of activities, for instance, antithrombotic, hypotensive, antioxidant, and insecticidal. They also provide a source of phthalides, which display antimicrobial activity. Considering the fact of rising resistance of both bacteria and fungi against commonly used antibiotics, developing of new naturally derived compounds is undeniably attractive approach. To our best knowledge, there are no other reviews concerning this subject in the literature. In view of above, an attempt to summarize an antimicrobial potential of isolated compounds and extracts from Apiaceae plants has been made, by specifying techniques of activity determination and methods of extraction. Techniques of antimicrobial activity evaluation are mainly based on bioautography, diffusion, and dilution methods. Therefore, we focused on in vitro data described in literature so far.
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Affiliation(s)
- Jakub Pannek
- Department of Chemistry, Wrocław University of Environmental and Life Sciences, Norwida 25, Wrocław, 50-375, Poland
| | - Joanna Gach
- Department of Chemistry, Wrocław University of Environmental and Life Sciences, Norwida 25, Wrocław, 50-375, Poland
| | - Filip Boratyński
- Department of Chemistry, Wrocław University of Environmental and Life Sciences, Norwida 25, Wrocław, 50-375, Poland
| | - Teresa Olejniczak
- Department of Chemistry, Wrocław University of Environmental and Life Sciences, Norwida 25, Wrocław, 50-375, Poland
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Horng YT, Wang CJ, Chung WT, Chao HJ, Chen YY, Soo PC. Phosphoenolpyruvate phosphotransferase system components positively regulate Klebsiella biofilm formation. JOURNAL OF MICROBIOLOGY, IMMUNOLOGY, AND INFECTION = WEI MIAN YU GAN RAN ZA ZHI 2018; 51:174-183. [DOI: 10.1016/j.jmii.2017.01.007] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Revised: 01/07/2017] [Accepted: 01/24/2017] [Indexed: 02/02/2023]
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Anesthesia in patients with infectious disease caused by multi-drug resistant bacteria. Curr Opin Anaesthesiol 2018; 30:426-434. [PMID: 28319476 DOI: 10.1097/aco.0000000000000457] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
PURPOSE OF REVIEW Up to 50% of specific bacterial strains in healthcare admission facilities are multi-drug resistant organisms (MDROs). Involvement of anesthesiologists in management of patients carrying/at risk of carrying MDROs may decrease transmission in the Operating Room (OR). RECENT FINDINGS Anesthesiologists, their work area and tools have all been implicated in MDRO outbreaks. Causes include contamination of external ventilation circuits and noncontribution of filters to prevention, inappropriate decontamination procedures for nondisposable equipment (e.g. laryngoscopes, bronchoscopes and stethoscopes) and the anesthesia workplace (e.g. external surfaces of cart and anesthesia machine, telephones and computer keyboards) during OR cleaning and lack of training in sterile drug management. SUMMARY Discussions regarding the management of potential MDRO carriers must include anesthesia providers to optimize infection control interventions as well as the anesthesia method, the location of surgery and recovery and the details of patient transport. Anesthesia staff must learn to identify patients at risk for MDRO infection. Antibiotic prophylaxis, although not evidence based, should adhere to known best practices. Adjuvant therapies (e.g. intranasal Mupirocin and bathing with antiseptics) should be considered. Addition of nonmanual OR cleaning methods such as ultraviolet irradiation or gaseous decontamination is encouraged. Anesthesiologists must undergo formal training in sterile drug preparation and administration.
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Abstract
PURPOSE OF REVIEW Recent outbreaks of carbapenem-resistant enterobacteriaceae related to duodenoscopes in the United States and Europe have gained international attention and resulted in new regulations, especially in the United States, affecting healthcare facilities. In this review, we summarize findings from recent duodenoscope-related outbreaks, highlight what is known about the risk of transmission from these devices and discuss controversies about current recommendations to prevent transmission. RECENT FINDINGS Between 2013 and 2015, several US and European healthcare facilities reported outbreaks of carbapenem-resistant enterobacteriaceae associated with endoscopic retrograde cholangiopancreatography procedures. Unlike prior outbreaks (attributed to lapses in cleaning and reprocessing), the recent outbreaks occurred in spite of adherence to current reprocessing guidelines. Factors associated with infection transmission include a low margin of safety for gastrointestinal endoscopic procedures and complex design features of duodenoscopes. Outbreaks were halted with enhanced cleaning and surveillance measures or by adopting gas sterilization methods. New guidance from manufacturers and federal agencies has been issued as a result of these recent outbreaks; however, concerns remain that the new measures may not eliminate risks to patients. SUMMARY Recent duodenoscope-related outbreaks have highlighted the need for a reassessment of current guidelines for endoscope reprocessing and for new design of duodenoscope components. Although we summarize the US experience, this review has global implications for the safe cleaning and disinfection of these instruments.
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Akinbobola AB, Sherry L, Mckay WG, Ramage G, Williams C. Tolerance of Pseudomonas aeruginosa in in-vitro biofilms to high-level peracetic acid disinfection. J Hosp Infect 2017. [PMID: 28648453 DOI: 10.1016/j.jhin.2017.06.024] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
BACKGROUND Biofilm has been suggested as a cause of disinfection failures in flexible endoscopes where no lapses in the decontamination procedure can be identified. To test this theory, the activity of peracetic acid, one of the widely used disinfectants in the reprocessing of flexible endoscopes, was evaluated against both planktonic and sessile communities of Pseudomonas aeruginosa. AIM To investigate the ability of P. aeruginosa biofilm to survive high-level peracetic acid disinfection. METHOD The susceptibility of planktonic cells of P. aeruginosa and biofilms aged 24, 48, 96, and 192 h to peracetic acid was evaluated by estimating their viability using resazurin viability and plate count methods. The biomass of the P. aeruginosa biofilms was also quantified using Crystal Violet assay. Planktonic cells of P. aeruginosa were treated with 5-30 ppm concentration of peracetic acid in the presence of 3.0 g/L of bovine serum albumin (BSA) for 5 min. Biofilms of P. aeruginosa were also treated with various peracetic acid concentrations (100-3000 ppm) for 5 min. FINDINGS Planktonic cells of P. aeruginosa were eradicated by 20 ppm of peracetic acid, whereas biofilms showed an age-dependent tolerance to peracetic acid, and 96 h biofilm was only eradicated at peracetic acid concentration of 2500 ppm. CONCLUSION Ninety-six-hour P. aeruginosa biofilm survives 5 min treatment with 2000 ppm of peracetic acid, which is the working concentration used in some endoscope washer-disinfectors. This implies that disinfection failure of flexible endoscopes might occur when biofilms build up in the lumens of endoscopes.
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Affiliation(s)
- A B Akinbobola
- Institute of Healthcare Policy and Practice, School of Health, Nursing, and Midwifery, University of the West of Scotland, Paisley, UK
| | - L Sherry
- Institute of Healthcare Policy and Practice, School of Health, Nursing, and Midwifery, University of the West of Scotland, Paisley, UK; Oral Sciences Research Group, Glasgow Dental School, School of Medicine, Dentistry and Nursing, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - W G Mckay
- Institute of Healthcare Policy and Practice, School of Health, Nursing, and Midwifery, University of the West of Scotland, Paisley, UK
| | - G Ramage
- Oral Sciences Research Group, Glasgow Dental School, School of Medicine, Dentistry and Nursing, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - C Williams
- Institute of Healthcare Policy and Practice, School of Health, Nursing, and Midwifery, University of the West of Scotland, Paisley, UK.
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Adenosine triphosphate bioluminescence for bacteriologic surveillance and reprocessing strategies for minimizing risk of infection transmission by duodenoscopes. Gastrointest Endosc 2017; 85:1180-1187.e1. [PMID: 27818222 PMCID: PMC5534172 DOI: 10.1016/j.gie.2016.10.035] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/08/2016] [Accepted: 10/21/2016] [Indexed: 12/11/2022]
Abstract
BACKGROUND AND AIMS Recent outbreaks of duodenoscope-transmitted infections underscore the importance of adequate endoscope reprocessing. Adenosine triphosphate (ATP) bioluminescence testing allows rapid evaluation of endoscopes for bacteriologic/biologic residue. In this prospective study we evaluate the utility of ATP in bacteriologic surveillance and the effects of endoscopy staff education and dual cycles of cleaning and high-level disinfection (HLD) on endoscope reprocessing. METHODS ATP bioluminescence was measured after precleaning, manual cleaning, and HLD on rinsates from suction-biopsy channels of all endoscopes and elevator channels of duodenoscopes/linear echoendoscopes after use. ATP bioluminescence was remeasured in duodenoscopes (1) after re-education and competency testing of endoscopy staff and subsequently (2) after 2 cycles of precleaning and manual cleaning and single cycle of HLD or (3) after 2 cycles of precleaning, manual cleaning, and HLD. RESULTS The ideal ATP bioluminescence benchmark of <200 relative light units (RLUs) after manual cleaning was achieved from suction-biopsy channel rinsates of all endoscopes, but 9 of 10 duodenoscope elevator channel rinsates failed to meet this benchmark. Re-education reduced RLUs in duodenoscope elevator channel rinsates after precleaning (23,218.0 vs 1340.5 RLUs, P < .01) and HLD (177.0 vs 12.0 RLUs, P < .01). After 2 cycles of manual cleaning/HLD, duodenoscope elevator channel RLUs achieved levels similar to sterile water, with corresponding negative cultures. CONCLUSIONS ATP testing offers a rapid, inexpensive alternative for detection of endoscope microbial residue. Re-education of endoscopy staff and 2 cycles of cleaning and HLD decreased elevator channel RLUs to levels similar to sterile water and may therefore minimize the risk of transmission of infections by duodenoscopes.
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Parohl N, Stiefenhöfer D, Heiligtag S, Reuter H, Dopadlik D, Mosel F, Gerken G, Dechêne A, Heintschel von Heinegg E, Jochum C, Buer J, Popp W. Monitoring of endoscope reprocessing with an adenosine triphosphate (ATP) bioluminescence method. GMS HYGIENE AND INFECTION CONTROL 2017; 12:Doc04. [PMID: 28405542 PMCID: PMC5373681 DOI: 10.3205/dgkh000289] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Background: The arising challenges over endoscope reprocessing quality proposes to look for possibilities to measure and control the process of endoscope reprocessing. Aim: The goal of this study was to evaluate the feasibility of monitoring endoscope reprocessing with an adenosine triphosphate (ATP) based bioluminescence system. Methods: 60 samples of eight gastroscopes have been assessed from routine clinical use in a major university hospital in Germany. Endoscopes have been assessed with an ATP system and microbial cultures at different timepoints during the reprocessing. Findings: After the bedside flush the mean ATP level in relative light units (RLU) was 19,437 RLU, after the manual cleaning 667 RLU and after the automated endoscope reprocessor (AER) 227 RLU. After the manual cleaning the mean total viable count (TVC) per endoscope was 15.3 CFU/10 ml, and after the AER 5.7 CFU/10 ml. Our results show that there are reprocessing cycles which are not able to clean a patient used endoscope. Conclusion: Our data suggest that monitoring of flexible endoscope with ATP can identify a number of different influence factors, like the endoscope condition and the endoscopic procedure, or especially the quality of the bedside flush and manual cleaning before the AER. More process control is one option to identify and improve influence factors to finally increase the overall reprocessing quality, best of all by different methods. ATP measurement seems to be a valid technique that allows an immediate repeat of the manual cleaning if the ATP results after manual cleaning exceed the established cutoff of 200 RLU.
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Affiliation(s)
| | - Doris Stiefenhöfer
- Department of Gastroenterology and Hepatology, University Hospital Essen, Germany
| | | | | | - Dana Dopadlik
- Department of Hospital Hygiene, University Hospital Essen, Germany
| | - Frank Mosel
- Department of Clinical Microbiology, University Hospital Essen, Germany
| | - Guido Gerken
- Department of Gastroenterology and Hepatology, University Hospital Essen, Germany
| | - Alexander Dechêne
- Department of Gastroenterology and Hepatology, University Hospital Essen, Germany
| | | | - Christoph Jochum
- Department of Gastroenterology and Hepatology, University Hospital Essen, Germany
| | - Jan Buer
- Department of Clinical Microbiology, University Hospital Essen, Germany
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Petersen BT, Cohen J, Hambrick RD, Buttar N, Greenwald DA, Buscaglia JM, Collins J, Eisen G. Multisociety guideline on reprocessing flexible GI endoscopes: 2016 update. Gastrointest Endosc 2017; 85:282-294.e1. [PMID: 28069113 DOI: 10.1016/j.gie.2016.10.002] [Citation(s) in RCA: 127] [Impact Index Per Article: 18.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Accepted: 10/03/2016] [Indexed: 12/11/2022]
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Paula H, Tribl B, Presterl E, Diab-El Schahawi M. Prospective microbiologic evaluation of the forceps elevator in closed-channel duodenoscopes after reprocessing. Am J Infect Control 2017; 45:121-125. [PMID: 28341284 DOI: 10.1016/j.ajic.2016.08.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Revised: 08/12/2016] [Accepted: 08/12/2016] [Indexed: 11/26/2022]
Abstract
BACKGROUND Endoscopes are well-known sources of bacterial transmission in health care facilities offering endoscopy services. The association between multidrug-resistant bacterial infections in patients who had undergone an endoscopic retrograde cholangiopancreatography procedure with reprocessed duodenoscopes has been much discussed. Bacterial contamination of duodenoscopes has been attributed to difficulties with reprocessing these devices, specifically the distal end of the scope, which features a movable forceps elevator. In light of a recent Food and Drug Administration warning letter to Olympus regarding their closed-channel duodenoscope model TJF-Q180V, the aim of our study was to prospectively evaluate the efficacy and safety of our current reprocessing procedures with regard to the TJF-Q180V duodenoscope models used in our hospital. METHODS From August 2015-March 2016, we prospectively collected microbiologic surveillance samples from 6 TJF-Q180V model duodenoscopes in routine use at the Division of Gastroenterology and Hepatology using the ESwab collection system (COPAN Diagnostics Inc, Murrieta, CA). RESULTS A total of 237 microbiologic samples from the forceps elevator were obtained during the survey period. None of the samples yielded microorganism growth. CONCLUSION These findings suggest that when following a diligent and validated reprocessing standard in accordance with manufacturer's recommendations, closed-channel endoscope models can still be used. Nevertheless, validated adaptions of current closed-channel duodenoscope models are needed to allow for simple and safe reprocessing. Furthermore, comprehensive postmarket surveillance needs to be established.
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Parsi MA, Sullivan SA, Goodman A, Manfredi M, Navaneethan U, Pannala R, Smith ZL, Thosani N, Banerjee S, Maple JT. Automated endoscope reprocessors. Gastrointest Endosc 2016; 84:885-892. [PMID: 27765382 DOI: 10.1016/j.gie.2016.08.025] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Accepted: 08/23/2016] [Indexed: 01/10/2023]
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Disposable Bronchoscope Model for Simulating Endoscopic Reprocessing and Surveillance Cultures. Infect Control Hosp Epidemiol 2016; 38:136-142. [PMID: 27866488 DOI: 10.1017/ice.2016.264] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND Endoscope-associated infections are reported despite following proper reprocessing methods. Microbiological testing can confirm the adequacy of endoscope reprocessing. Multiple controversies related to the method and interpretation of microbiological testing cultures have arisen that make their routine performance a complex target. OBJECTIVE We conducted a pilot study using disposable bronchoscopes (DBs) to simulate different reprocessing times and soaking times and to compare high-level disinfection versus ethylene oxide sterilization. We also reviewed the time to reprocessing and duration of the procedures. METHODS Bronchoscopes were chosen because an alternative disposable scope is commercially available and because bronchoscopes are more prone to delays in processing. Disposable bronchoscopes were contaminated using a liquid bacterial suspension and were then incubated for 1-4 hours. Standard processing and high-level disinfection were performed on 36 endoscopes. Ethylene oxide sterilization was performed on 21 endoscopes. Endoscope cultures were performed using the standard "brush, flush, brush" technique. RESULTS After brushing was performed, a final water-flush culture procedure was the most effective method of detecting bacterial persistence on the disposable scopes. Klebsiella pneumoniae was the most commonly recovered organism after reprocessing. Ethylene oxide sterilization did not result in total elimination of viable bacteria. CONCLUSION Routine endoscopy cultures may be required to assess the adequacy of endoscopic processing. Infect Control Hosp Epidemiol 2017;38:136-142.
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McGrath BA, Ruane S, McKenna J, Thomas S. Contamination of single-use bronchoscopes in critically ill patients. Anaesthesia 2016; 72:36-41. [PMID: 27747865 DOI: 10.1111/anae.13622] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/29/2016] [Indexed: 11/29/2022]
Abstract
Disposable bronchoscopes such as the Ambu aScopeTM 3 are marketed as 'single use' The risks of contamination from prolonged device storage before possible re-use are unknown. Following clinical bronchoscopy in patients whose lungs were mechanically ventilated, 20 aScopeTM 3's bronchoscopes received a standard 'social clean' and were then stored. Subsequent paired saline flush and swab samples were taken at time zero, and at 24 h and 48 h. Positive microbiological cultures were obtained from at least one time point from 16 of the 20 bronchoscopes. Pathogens considered at high risk of causing pneumonia were isolated from seven bronchoscopes, with significant quantities from six of them. Our study demonstrates that aScopeTM 3's should not be re-used on the same patient, as clinically significant growth of micro-organisms occurs frequently, despite adequate social cleaning. Culture of bronchoscopes themselves may be a potentially useful diagnostic tool in the context of pulmonary infection. Our data make it clear that these devices are single use and not single patient use.
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Affiliation(s)
- B A McGrath
- University Hospital South Manchester, Manchester, UK.,Manchester Academic Health Sciences Campus, Manchester, UK
| | - S Ruane
- Health Education North-West, Manchester, UK
| | - J McKenna
- University Hospital South Manchester, Manchester, UK
| | - S Thomas
- University Hospital South Manchester, Manchester, UK
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Infectious complications in gastrointestinal endoscopy and their prevention. Best Pract Res Clin Gastroenterol 2016; 30:689-704. [PMID: 27931630 DOI: 10.1016/j.bpg.2016.09.008] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Revised: 08/31/2016] [Accepted: 09/06/2016] [Indexed: 01/31/2023]
Abstract
Gastrointestinal endoscopes are medical devices that have been associated with outbreaks of health care-associated infections. Because of the severity and limited treatment options of infections caused by multidrug-resistant Enterobacteriaceae and Pseudomonas aeruginosa, considerable attention has been paid to detection and prevention of these post-endoscopic outbreaks. Endoscope reprocessing involves cleaning, high-level disinfection/sterilization followed by rinsing and drying before storage. Failure of the decontamination process implies the risk of settlement of biofilm producing species in endoscope channels. This review covers the infectious complications in gastrointestinal endoscopy and their prevention and highlights the problem of infection risk associated with different steps of endoscope reprocessing.
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Talukdar R, Nageshwar Reddy D. ERCP in developing countries: the way forward. Gastrointest Endosc 2016; 84:667-9. [PMID: 27633360 DOI: 10.1016/j.gie.2016.04.037] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Accepted: 04/27/2016] [Indexed: 02/06/2023]
Affiliation(s)
- Rupjyoti Talukdar
- Asian Institute of Gastroenterology, Asian Healthcare Foundation, Hyderabad, India
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Abstract
Numerous outbreaks of duodenoscope-associated transmission of multi-drug resistant bacteria have recently been reported. Unlike prior episodes of endoscope-transmitted infections, the latest outbreaks have occurred despite strict adherence to duodenoscope reprocessing guidelines. The current standard for all flexible endoscope reprocessing includes pre-cleaning, leak testing, an additional manual cleaning step, and high-level disinfection. When these steps are strictly followed, the risk of infection transmission during endoscopy is exceedingly rare. However, due to its complex design, the duodenoscope may not be able to be adequately disinfected using the current reprocessing standards. Supplemental measures to enhance scope reprocessing have subsequently been recommended to reduce the infection risk in patients undergoing endoscopic retrograde cholangiopancreatography. These methods are likely short-term solutions that have yet to be validated regarded their effectiveness. Additional approaches to monitor the quality of duodenoscope reprocessing may also be useful. Ultimately, a definitive, yet logistically feasible, method of duodenoscope reprocessing is required to ensure the safety of our patients.
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Affiliation(s)
- Stephen Kim
- Division of Digestive Diseases, David Geffen School of Medicine at the University of California, Los Angeles (UCLA), Los Angeles, CA, 90095, USA
| | - V Raman Muthusamy
- Division of Digestive Diseases, David Geffen School of Medicine at the University of California, Los Angeles (UCLA), Los Angeles, CA, 90095, USA.
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Kim S, Russell D, Mohamadnejad M, Makker J, Sedarat A, Watson RR, Yang S, Hemarajata P, Humphries R, Rubin Z, Muthusamy VR. Risk factors associated with the transmission of carbapenem-resistant Enterobacteriaceae via contaminated duodenoscopes. Gastrointest Endosc 2016; 83:1121-9. [PMID: 26993149 DOI: 10.1016/j.gie.2016.03.790] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Accepted: 03/08/2016] [Indexed: 12/11/2022]
Abstract
BACKGROUND AND AIMS The duodenoscopes used to perform ERCP have been implicated in several outbreaks of carbapenem-resistant Enterobacteriaceae (CRE) infection. The risk factors for CRE transmission via contaminated duodenoscopes remain unclear. METHODS In this retrospective, single-center, case-control study, all patients who underwent ERCP with either 1 of 2 contaminated duodenoscopes were evaluated. We compared the patients who acquired CRE (active infection or colonization) with those who did not. RESULTS Between October 3, 2014, and January 28, 2015, a total of 125 procedures were performed on 115 patients by using either of the contaminated duodenoscopes. Culture data were available for 104 of the 115 exposed patients (90.4%). Among these patients, 15 (14.4%) became actively infected (n = 8, 7.7%) or colonized (n = 7, 6.7%) with CRE. On univariate analysis, recent antibiotic exposure (66.7% vs 37.1%; P = .046), active inpatient status (60.0% vs 28.1%; P = .034), and a history of cholangiocarcinoma (26.7% vs 3.4%; P = .008) were patient characteristics associated with an increased risk of CRE infection. Biliary stent placement (53.3% vs 22.5%; P = .024) during ERCP was a significant procedure-related risk factor. After adjusting for cholangiocarcinoma, biliary stent placement (odds ratio 3.62; 95% confidence interval, 1.12-11.67), and active inpatient status (odds ratio 3.74; 95% confidence interval, 1.15-12.12) remained independent risk factors for CRE transmission. CONCLUSIONS In patients undergoing ERCP with a contaminated duodenoscope, biliary stent placement, a diagnosis of cholangiocarcinoma, and active inpatient status are associated with an increased risk of CRE transmission.
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Affiliation(s)
- Stephen Kim
- Division of Digestive Diseases, David Geffen School of Medicine at the University of California, Los Angeles, Los Angeles, California, USA
| | - Dana Russell
- Clinical Epidemiology and Infection Prevention, University of California, Los Angeles Health, Los Angeles, California, USA
| | - Mehdi Mohamadnejad
- Division of Digestive Diseases, David Geffen School of Medicine at the University of California, Los Angeles, Los Angeles, California, USA
| | - Jitin Makker
- Division of Digestive Diseases, David Geffen School of Medicine at the University of California, Los Angeles, Los Angeles, California, USA
| | - Alireza Sedarat
- Division of Digestive Diseases, David Geffen School of Medicine at the University of California, Los Angeles, Los Angeles, California, USA
| | - Rabindra R Watson
- Division of Digestive Diseases, David Geffen School of Medicine at the University of California, Los Angeles, Los Angeles, California, USA
| | - Shangxin Yang
- Pathology and Laboratory Medicine, David Geffen School of Medicine at the University of California, Los Angeles, Los Angeles, California, USA
| | - Peera Hemarajata
- Pathology and Laboratory Medicine, David Geffen School of Medicine at the University of California, Los Angeles, Los Angeles, California, USA
| | - Romney Humphries
- Pathology and Laboratory Medicine, David Geffen School of Medicine at the University of California, Los Angeles, Los Angeles, California, USA
| | - Zachary Rubin
- Infectious Diseases, David Geffen School of Medicine at the University of California, Los Angeles, Los Angeles, California, USA
| | - V Raman Muthusamy
- Division of Digestive Diseases, David Geffen School of Medicine at the University of California, Los Angeles, Los Angeles, California, USA
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Jørgensen S, Bojer M, Boll E, Martin Y, Helmersen K, Skogstad M, Struve C. Heat-resistant, extended-spectrum β-lactamase-producing Klebsiella pneumoniae in endoscope-mediated outbreak. J Hosp Infect 2016; 93:57-62. [DOI: 10.1016/j.jhin.2016.01.014] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2015] [Accepted: 01/20/2016] [Indexed: 11/30/2022]
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Higa JT, Gluck M, Ross AS. Duodenoscope-Associated Bacterial Infections: A Review and Update. ACTA ACUST UNITED AC 2016; 14:185-93. [PMID: 27020265 DOI: 10.1007/s11938-016-0088-9] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
OPINION STATEMENT Physicians depend on the use of flexible endoscopes for delivery of vital care that is morbidity sparing compared to surgical alternatives. Iatrogenic infection is a well-documented complication of therapeutic endoscopy. Recent emergence of unique antimicrobial resistance patterns and molecular "fingerprinting" of bacteria harken a new era in duodenoscope-related infections which occur in spite of compliance with device manufacturer-recommended protocols for high-level disinfection (HLD). Further studies suggest that these protocols are likely inadequate. Endoscopic retrograde cholangiopancreatography (ERCP) remains critical in the provision of minimally invasive diagnostic, therapeutic, and palliative care for patients with pancreaticobiliary disease. This manuscript reviews the history of duodenoscope-related infections, current challenges to scope reprocessing, and recommendations from regulatory agencies.
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Affiliation(s)
- Jennifer T Higa
- Division of Gastroenterology, University of Washington School of Medicine, 1959 NE Pacific Street, Box 356424, Seattle, WA, 98105, USA
| | - Michael Gluck
- Division of Gastroenterology, Virginia Mason Medical Center, 1100 Ninth Ave, C3GAS, Seattle, WA, 98111, USA
| | - Andrew S Ross
- Division of Gastroenterology, Virginia Mason Medical Center, 1100 Ninth Ave, C3GAS, Seattle, WA, 98111, USA.
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