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Matsumura Y, Ikegaya K. MALDI-TOF MS Approaches for the Identification of the Susceptibility of Extended-Spectrum β-Lactamases in Escherichia coli. Microorganisms 2023; 11:1250. [PMID: 37317224 DOI: 10.3390/microorganisms11051250] [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: 04/03/2023] [Revised: 04/28/2023] [Accepted: 05/04/2023] [Indexed: 06/16/2023] Open
Abstract
The increase in multidrug-resistant microorganisms that produce extended-spectrum β-lactamases (ESBLs) and carbapenemases is a serious problem worldwide. Recently, matrix-assisted laser desorption ionization-time-of-flight mass spectrometry (MALDI-TOF MS) has been used for the rapid detection of antibiotic-resistant bacteria. The objective of this study was to establish a method to detect ESBL-producing Escherichia coli by monitoring the hydrolyzation of cefotaxime (CTX) using MALDI-TOF MS. According to the ratio of the peak intensity of CTX and hydrolyzed-CTX-related compounds, the ESBL-producing strains could be clearly distinguished after 15 min of incubation. Moreover, the minimum inhibitory concentration (MIC) values for E. coli were 8 μg/mL and lower than 4 μg/mL, which could be distinguished after 30 min and 60 min of incubation, respectively. The enzymatic activity was determined using the difference in the signal intensity of the hydrolyzed CTX at 370 Da for the ESBL-producing strains incubated with or without clavulanate. The ESBL-producing strains with low enzymatic activity or blaCTX-M genes could be detected by monitoring the hydrolyzed CTX. These results show that this method can rapidly detect high-sensitivity ESBL-producing E. coli.
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Affiliation(s)
- Yuriko Matsumura
- Postgraduate School of Healthcare, Tokyo Healthcare University, 4-1-17 Higashi-Gotanda, Shinagawa-ku, Tokyo 141-8648, Japan
| | - Kazuko Ikegaya
- Shizuoka City Shimizu Hospital, 1231, Miyakami, Shimizu-ku, Shizuoka 424-8638, Japan
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Kaji D, Matsumura Y, Iwasawa A, Kimura S, Iwama A. Rapid detection of bacteria that produce extended-spectrum β-lactamase by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. J Glob Antimicrob Resist 2021; 27:309-314. [PMID: 34710631 DOI: 10.1016/j.jgar.2021.09.009] [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: 04/30/2021] [Revised: 09/25/2021] [Accepted: 09/30/2021] [Indexed: 10/20/2022] Open
Abstract
OBJECTIVES Proper use of antibacterial agents is necessary to prevent the spread of drug-resistant bacteria. To support clinicians, laboratories need to rapidly determine bacterial drug susceptibility/resistance. We have established a method to distinguish extended-spectrum β-lactamase (ESBL)-producing clinical isolates by capturing structural changes in β-lactam antibiotics using matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF/MS). METHODS Clinical isolates of Escherichia coli, Klebsiella pneumoniae and Proteus mirabilis, classified into ESBL-producing strains and sensitive strains based on the presence or absence of a CTX-M-type gene, were used. Test bacteria were cultured aerobically in solid-phase wells of Eiken DPD1 dry plates at 35°C for 15 min or 30 min with the antibiotics cefotaxime (CTX), cefpodoxime (CPDX) or piperacillin (PIPC). Culture supernatants were then used for analysis with a MALDI Biotyper. RESULTS Signals derived from non-hydrolyzed products of antibiotics were observed in all strains. In the case of ESBL-producing strains, signals derived from the hydrolysis products of antibiotics were also observed. Since the ratio of signal intensity derived from hydrolysis products divided by the total signal intensity detected was ≥11% for CTX and ≥6% for CPDX and PIPC, all strains were determined to be ESBL-producing bacteria. CONCLUSION The short incubation time of 15 min suggests that this method can identify ESBL-producing strains much more rapidly than conventional methods.
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Affiliation(s)
- Daiki Kaji
- Division of Infection Prevention and Control, Tokyo Healthcare University Postgraduate School, 4-1-17 Higashi-Gotanda, Shinagawa-ku, Tokyo, Japan; Clinical Laboratory Department, Kimitsu Chuo Hospital, 1010 Sakurai, Kisarazu City, Chiba, Japan
| | - Yuriko Matsumura
- Division of Infection Prevention and Control, Tokyo Healthcare University Postgraduate School, 4-1-17 Higashi-Gotanda, Shinagawa-ku, Tokyo, Japan.
| | - Atsuo Iwasawa
- Division of Infection Prevention and Control, Tokyo Healthcare University Postgraduate School, 4-1-17 Higashi-Gotanda, Shinagawa-ku, Tokyo, Japan
| | - Satoshi Kimura
- Division of Infection Prevention and Control, Tokyo Healthcare University Postgraduate School, 4-1-17 Higashi-Gotanda, Shinagawa-ku, Tokyo, Japan
| | - Akiko Iwama
- Clinical Laboratory Department, Kimitsu Chuo Hospital, 1010 Sakurai, Kisarazu City, Chiba, Japan
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Zhang R, Dong N, Shen Z, Zeng Y, Lu J, Liu C, Zhou H, Hu Y, Sun Q, Cheng Q, Shu L, Cai J, Chan EWC, Chen G, Chen S. Epidemiological and phylogenetic analysis reveals Flavobacteriaceae as potential ancestral source of tigecycline resistance gene tet(X). Nat Commun 2020; 11:4648. [PMID: 32938927 PMCID: PMC7494873 DOI: 10.1038/s41467-020-18475-9] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2020] [Accepted: 08/25/2020] [Indexed: 11/25/2022] Open
Abstract
Emergence of tigecycline-resistance tet(X) gene orthologues rendered tigecycline ineffective as last-resort antibiotic. To understand the potential origin and transmission mechanisms of these genes, we survey the prevalence of tet(X) and its orthologues in 2997 clinical E. coli and K. pneumoniae isolates collected nationwide in China with results showing very low prevalence on these two types of strains, 0.32% and 0%, respectively. Further surveillance of tet(X) orthologues in 3692 different clinical Gram-negative bacterial strains collected during 1994–2019 in hospitals in Zhejiang province, China reveals 106 (2.7%) tet(X)-bearing strains with Flavobacteriaceae being the dominant (97/376, 25.8%) bacteria. In addition, tet(X)s are found to be predominantly located on the chromosomes of Flavobacteriaceae and share similar GC-content as Flavobacteriaceae. It also further evolves into different orthologues and transmits among different species. Data from this work suggest that Flavobacteriaceae could be the potential ancestral source of the tigecycline resistance gene tet(X). Emergence of tigecycline-resistance tet(X) genes is of concern. Here, the authors determine tet(X) prevalence in more than 6,000 clinical Gram-negative bacterial isolates collected between 1994 to 2019 in hospitals in China and suggest that Flavobacteriaceae could be the potential ancestral source of the tigecycline resistance genes.
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Affiliation(s)
- Rong Zhang
- Department of Clinical Laboratory, Second Affiliated Hospital of Zhejiang University, School of Medicine, Zhejiang, Hangzhou, China
| | - Ning Dong
- Department of Infectious Diseases and Public Health, Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Kowloon, Hong Kong, China
| | - Zhangqi Shen
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Yu Zeng
- Department of Clinical Laboratory, Second Affiliated Hospital of Zhejiang University, School of Medicine, Zhejiang, Hangzhou, China
| | - Jiauyue Lu
- Department of Clinical Laboratory, Second Affiliated Hospital of Zhejiang University, School of Medicine, Zhejiang, Hangzhou, China
| | - Congcong Liu
- Department of Clinical Laboratory, Second Affiliated Hospital of Zhejiang University, School of Medicine, Zhejiang, Hangzhou, China
| | - Hongwei Zhou
- Department of Clinical Laboratory, Second Affiliated Hospital of Zhejiang University, School of Medicine, Zhejiang, Hangzhou, China
| | - Yanyan Hu
- Department of Clinical Laboratory, Second Affiliated Hospital of Zhejiang University, School of Medicine, Zhejiang, Hangzhou, China
| | - Qiaoling Sun
- Department of Clinical Laboratory, Second Affiliated Hospital of Zhejiang University, School of Medicine, Zhejiang, Hangzhou, China
| | - Qipeng Cheng
- Department of Infectious Diseases and Public Health, Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Kowloon, Hong Kong, China.,State Key Lab of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, China
| | - Lingbing Shu
- Department of Clinical Laboratory, Second Affiliated Hospital of Zhejiang University, School of Medicine, Zhejiang, Hangzhou, China
| | - Jiachang Cai
- Department of Clinical Laboratory, Second Affiliated Hospital of Zhejiang University, School of Medicine, Zhejiang, Hangzhou, China
| | - Edward Wai-Chi Chan
- State Key Lab of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, China
| | - Gongxiang Chen
- Department of Clinical Laboratory, Second Affiliated Hospital of Zhejiang University, School of Medicine, Zhejiang, Hangzhou, China.
| | - Sheng Chen
- Department of Infectious Diseases and Public Health, Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Kowloon, Hong Kong, China.
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Tadros M, Goneau L, Romaschin A, Jarvis M, Matukas L. Rapid detection of resistance to carbapenems and cephalosporins in Enterobacteriaceae using liquid chromatography tandem mass spectrometry. PLoS One 2018; 13:e0206842. [PMID: 30412608 PMCID: PMC6226185 DOI: 10.1371/journal.pone.0206842] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Accepted: 10/19/2018] [Indexed: 12/20/2022] Open
Abstract
Carbapenemase producing Enterobacteriaceae (CPE) are becoming a global healthcare concern. Current laboratory methods for the detection of CPE include screening followed by confirmatory phenotypic and genotypic tests. These processes would generally take ≥72 hours, which could negatively impact patient care and Infection Control practices. To this end, we developed a protocol for rapid resistance testing (RRT) to detect hydrolysis in a panel of beta lactam antibiotics consisting of ampicillin, cefazolin, cefotaxime and imipenem, using liquid chromatography tandem mass spectrometry. Ninety—nine beta lactamase producing Enterobacteriaceae isolates were used to evaluate the RRT method, 54 isolates were CPE and 45 isolates were Class A or AmpC beta lactamase producing Enterobacteriaceae but not carbapenemase producers. We also tested 10 E.coli isolates that were susceptible to ampicillin, cefazolin, cefotaxime and imipenem. Receiver Operating Characteristic (ROC) Curves analysis showed that imipenem had a sensitivity and a specificity of 100% for crabapenemase detection at hydrolysis cut off values that are greater than 50% and less than or equal to 80%. The RRT protocol can be conducted in a time frame of less than 2 hours. This preliminary study shows that the rapid resistance testing protocol might have utility for the rapid detection of CPE. Additional work with a greater number and variety of beta- lactamase producing Enterobacteriaceae isolates is required to validate these preliminary findings.
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Affiliation(s)
- Manal Tadros
- Department of Laboratory Medicine & Pathobiology, University of Toronto, Toronto, Ontario, Canada
- Division of Microbiology, St. Michael’s Hospital, Toronto, Ontario, Canada
- * E-mail:
| | - Lee Goneau
- Department of Microbiology, Public Health Ontario, Toronto, Ontario, Canada
| | | | | | - Larissa Matukas
- Department of Laboratory Medicine & Pathobiology, University of Toronto, Toronto, Ontario, Canada
- Division of Microbiology, St. Michael’s Hospital, Toronto, Ontario, Canada
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Bouza E, Muñoz P, Burillo A. Role of the Clinical Microbiology Laboratory in Antimicrobial Stewardship. Med Clin North Am 2018; 102:883-898. [PMID: 30126578 DOI: 10.1016/j.mcna.2018.05.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
For adequate antimicrobial stewardship, microbiology needs to move from the laboratory to become physically and verbally amenable to the caregivers of an institution. Herein, we describe the contributions of our microbiology department to the antimicrobial stewardship program of a large teaching hospital as 10 main points ranging from the selection of patients deemed likely to benefit from a fast track approach, to their clinical samples, or the rapid reporting of results via a microbiology hotline, to rapid searches for pathogens and susceptibility testing. These points should serve as guidelines for similar programs designed to decrease the unnecessary use of antimicrobials.
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Affiliation(s)
- Emilio Bouza
- Medicine Department, School of Medicine, Universidad Complutense de Madrid (UCM), Plaza Ramón y Cajal s/n, Madrid 28040, Spain; Instituto de Investigación Sanitaria Gregorio Marañón, Doctor Esquerdo, 46, Madrid 28007, Spain; Department of Clinical Microbiology and Infectious Diseases, Hospital General Universitario Gregorio Marañón, Doctor Esquerdo 46, Madrid 28007, Spain; CIBER de Enfermedades Respiratorias (CIBERES CB06/06/0058), Doctor Esquerdo 46, Madrid 28007, Spain.
| | - Patricia Muñoz
- Medicine Department, School of Medicine, Universidad Complutense de Madrid (UCM), Plaza Ramón y Cajal s/n, Madrid 28040, Spain; Instituto de Investigación Sanitaria Gregorio Marañón, Doctor Esquerdo, 46, Madrid 28007, Spain; Department of Clinical Microbiology and Infectious Diseases, Hospital General Universitario Gregorio Marañón, Doctor Esquerdo 46, Madrid 28007, Spain; CIBER de Enfermedades Respiratorias (CIBERES CB06/06/0058), Doctor Esquerdo 46, Madrid 28007, Spain
| | - Almudena Burillo
- Medicine Department, School of Medicine, Universidad Complutense de Madrid (UCM), Plaza Ramón y Cajal s/n, Madrid 28040, Spain; Instituto de Investigación Sanitaria Gregorio Marañón, Doctor Esquerdo, 46, Madrid 28007, Spain; Department of Clinical Microbiology and Infectious Diseases, Hospital General Universitario Gregorio Marañón, Doctor Esquerdo 46, Madrid 28007, Spain
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Gray J. Ten recent articles from the Journal of Hospital Infection that would not have been seen in Issue 1. J Hosp Infect 2018; 100:120-121. [PMID: 30076865 PMCID: PMC7134505 DOI: 10.1016/j.jhin.2018.07.040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Accepted: 07/26/2018] [Indexed: 12/05/2022]
Affiliation(s)
- James Gray
- 162 King's Cross Road, London WC1X 9DH, UK.
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Grégory D, Chaudet H, Lagier JC, Raoult D. How mass spectrometric approaches applied to bacterial identification have revolutionized the study of human gut microbiota. Expert Rev Proteomics 2018; 15:217-229. [PMID: 29336192 DOI: 10.1080/14789450.2018.1429271] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
INTRODUCTION Describing the human hut gut microbiota is one the most exciting challenges of the 21st century. Currently, high-throughput sequencing methods are considered as the gold standard for this purpose, however, they suffer from several drawbacks, including their inability to detect minority populations. The advent of mass-spectrometric (MS) approaches to identify cultured bacteria in clinical microbiology enabled the creation of the culturomics approach, which aims to establish a comprehensive repertoire of cultured prokaryotes from human specimens using extensive culture conditions. Areas covered: This review first underlines how mass spectrometric approaches have revolutionized clinical microbiology. It then highlights the contribution of MS-based methods to culturomics studies, paying particular attention to the extension of the human gut microbiota repertoire through the discovery of new bacterial species. Expert commentary: MS-based approaches have enabled cultivation methods to be resuscitated to study the human gut microbiota and thus to fill in the blanks left by high-throughput sequencing methods in terms of culturing minority populations. Continued efforts to recover new taxa using culture methods, combined with their rapid implementation in genomic databases, would allow for an exhaustive analysis of the gut microbiota through the use of a comprehensive approach.
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Affiliation(s)
- Dubourg Grégory
- a Aix Marseille Université, Microbes Evolution Phylogeny and Infections (MEPHI), Assistance Publique - Hôpitaux de Marseille - IHU Méditerranée Infection , Marseille , France
| | - Hervé Chaudet
- a Aix Marseille Université, Microbes Evolution Phylogeny and Infections (MEPHI), Assistance Publique - Hôpitaux de Marseille - IHU Méditerranée Infection , Marseille , France
| | - Jean-Christophe Lagier
- a Aix Marseille Université, Microbes Evolution Phylogeny and Infections (MEPHI), Assistance Publique - Hôpitaux de Marseille - IHU Méditerranée Infection , Marseille , France
| | - Didier Raoult
- a Aix Marseille Université, Microbes Evolution Phylogeny and Infections (MEPHI), Assistance Publique - Hôpitaux de Marseille - IHU Méditerranée Infection , Marseille , France
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