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Pham CD, Pettus K, Nash EE, Liu H, St Cyr SB, Schlanger K, Papp J, Gartin J, Dorji T, Akullo K, Kersh EN. Utility of MALDI-TOF MS for differentiation of Neisseria gonorrhoeae isolates with dissimilar azithromycin susceptibility profiles. J Antimicrob Chemother 2021; 75:3202-3208. [PMID: 32737509 DOI: 10.1093/jac/dkaa303] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Accepted: 06/09/2020] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND Antibiotic-resistant gonorrhoea has been a chronic public health burden since the mid-1930s. Recent emergence of isolates resistant to the current recommended antibiotics for gonorrhoea further magnifies the threat of untreatable gonorrhoea. The lack of new, effective antibiotics highlights the need for better understanding of the population structure of Neisseria gonorrhoeae in order to provide greater insight on how to curtail the spread of antimicrobial-resistant N. gonorrhoeae. OBJECTIVES To explore a potential application of MALDI-TOF MS to differentiate N. gonorrhoeae displaying different levels of susceptibility to the antibiotic azithromycin. METHODS We conducted MALDI-TOF MS using the Bruker Biotyper on 392 N. gonorrhoeae isolates collected through the Gonococcal Isolate Surveillance Project (GISP) and/or the Strengthening the United States Response to Resistant Gonorrhea (SURRG) project. The MALDI-TOF MS spectra were visually analysed to assess the presence of distinctive peak(s). Statistical analysis was performed to assess the relationship between gonococcal isolates with the distinct protein peak and antibiotic susceptibility. RESULTS In this study, we were able to differentiate N. gonorrhoeae isolates into two distinct subpopulations using MALDI-TOF MS. Isolates were distinguished by the presence or absence of a spectral peak at 11 300 Da. Notably, these two groups exhibited different levels of susceptibility to azithromycin. CONCLUSIONS We have shown that in addition to its ability to identify N. gonorrhoeae, MALDI-TOF MS could also be used to differentiate gonococcal isolates with different levels of susceptibility to azithromycin.
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Affiliation(s)
- Cau D Pham
- Division of STD Prevention, National Center for HIV/AIDS, Viral Hepatitis, STD, and TB, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Kevin Pettus
- Division of STD Prevention, National Center for HIV/AIDS, Viral Hepatitis, STD, and TB, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Evelyn E Nash
- Division of STD Prevention, National Center for HIV/AIDS, Viral Hepatitis, STD, and TB, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Hsi Liu
- Division of STD Prevention, National Center for HIV/AIDS, Viral Hepatitis, STD, and TB, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Sancta B St Cyr
- Division of STD Prevention, National Center for HIV/AIDS, Viral Hepatitis, STD, and TB, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Karen Schlanger
- Division of STD Prevention, National Center for HIV/AIDS, Viral Hepatitis, STD, and TB, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - John Papp
- Division of STD Prevention, National Center for HIV/AIDS, Viral Hepatitis, STD, and TB, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Jarrett Gartin
- Division of High Consequence Pathogens and Pathology, National Center for Emerging and Zoonotic Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Tandin Dorji
- Division of STD Prevention, National Center for HIV/AIDS, Viral Hepatitis, STD, and TB, Centers for Disease Control and Prevention, Atlanta, GA, USA.,Oak Ridge Institute for Science and Education, Oak Ridge, TN, USA
| | | | - Ellen N Kersh
- Division of STD Prevention, National Center for HIV/AIDS, Viral Hepatitis, STD, and TB, Centers for Disease Control and Prevention, Atlanta, GA, USA
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Kubo Y, Ueda O, Nagamitsu S, Yamanishi H, Nakamura A, Komatsu M. Novel strategy of rapid typing of Shiga toxin-producing Escherichia coli using MALDI Biotyper and ClinProTools analysis. J Infect Chemother 2021; 27:1137-1142. [PMID: 33745812 DOI: 10.1016/j.jiac.2021.03.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2020] [Revised: 02/14/2021] [Accepted: 03/01/2021] [Indexed: 11/17/2022]
Abstract
INTRODUCTION Rapid detection of Shiga toxin-producing Escherichia coli (STEC) is essential. Matrix-assisted laser-desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) allows rapid, accurate, and low-cost microbial identification. We aimed to examine the discrimination ability of MALDI Biotyper (Bruker Daltonics) between STEC and non-STEC. METHODS In total, 234 strains (79 STEC strains and 155 non-STEC strains) isolated from stool between 2009 and 2014 were measured by MALDI Biotyper and mass spectra of 2000-20,000 m/z were analyzed with ClinProTools (Bruker Daltonics). Eighty-three strains were randomly extracted to produce STEC detection models using 3 algorithms, and 151 strains were used as validation samples to verify STEC detection performance and discrimination performance of Shiga toxins with the STEC detection models. RESULTS The STEC detection model with Quick Classifier (QC) algorithm was the most sensitive: sensitivity, 84.1% (37/44); specificity, 94.4% (101/107). Discrimination between STEC and non-STEC was excellent, but individual discrimination of Shiga toxins was not possible. CONCLUSION MALDI Biotyper may be a useful rapid diagnostic method for STEC infection.
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Affiliation(s)
- Yumi Kubo
- FALCO Biosystems K. K., Tokai Central Laboratory, Test Group Microbiology, Aichi, Japan.
| | | | - Sawa Nagamitsu
- FALCO Biosystems K. K., Okayama Laboratory, Test Group Microbiology, Okayama, Japan.
| | - Hachiro Yamanishi
- Department of Clinical Laboratory Science, Faculty of Health Care, Tenri Health Care University, Japan.
| | - Akihiro Nakamura
- Department of Clinical Laboratory Science, Faculty of Health Care, Tenri Health Care University, Japan.
| | - Masaru Komatsu
- Department of Clinical Laboratory Science, Faculty of Health Care, Tenri Health Care University, Japan.
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Pereckaite L, Tatarunas V, Giedraitiene A. Current antimicrobial susceptibility testing for beta-lactamase-producing Enterobacteriaceae in clinical settings. J Microbiol Methods 2018; 152:154-164. [PMID: 30063958 DOI: 10.1016/j.mimet.2018.07.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2018] [Revised: 07/16/2018] [Accepted: 07/27/2018] [Indexed: 11/17/2022]
Abstract
The worldwide prevalence of beta-lactamase-producing Enterobacteriaceae (BL-E) is increasing. Bacterial infections involving ESBLs can be more difficult to treat because of antibiotic resistance, as there are fewer effective antibiotics left to be used. Moreover, treatment failure is often observed. Thus, quick and accurate identification of β-lactamases is imperative to minimize it. This review article describes most commonly used phenotypic techniques and molecular methods for the detection of ESBLs, acquired AmpC β-lactamases, and carbapenemases produced by Enterobacteriaceae. Phenotypic detection tests remain useful and relevant in clinical laboratories while molecular diagnostic methods are less affordable, more technically demanding, and not standardized. Molecular methods could be used to speed up results of bacterial antibiotic resistance or to clarify the results of phenotypic β-lactamases confirmation tests.
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Affiliation(s)
- Laura Pereckaite
- Department of Laboratory Medicine, Lithuanian University of Health Sciences, Kaunas, Lithuania
| | - Vacis Tatarunas
- Institute of Cardiology, Lithuanian University of Health Sciences, Kaunas, Lithuania
| | - Agne Giedraitiene
- Institute of Microbiology and Virology, Lithuanian University of Health Sciences, Kaunas, Lithuania.
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A Decade of Development of Chromogenic Culture Media for Clinical Microbiology in an Era of Molecular Diagnostics. Clin Microbiol Rev 2017; 30:449-479. [PMID: 28122803 DOI: 10.1128/cmr.00097-16] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
In the last 25 years, chromogenic culture media have found widespread application in diagnostic clinical microbiology. In the last decade, the range of media available to clinical laboratories has expanded greatly, allowing specific detection of additional pathogens, including Pseudomonas aeruginosa, group B streptococci, Clostridium difficile, Campylobacter spp., and Yersinia enterocolitica. New media have also been developed to screen for pathogens with acquired antimicrobial resistance, including vancomycin-resistant enterococci, carbapenem-resistant Acinetobacter spp., and Enterobacteriaceae with extended-spectrum β-lactamases and carbapenemases. This review seeks to explore the utility of chromogenic media in clinical microbiology, with particular attention given to media that have been commercialized in the last decade. The impact of laboratory automation and complementary technologies such as matrix-assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF MS) is also assessed. Finally, the review also seeks to demarcate the role of chromogenic media in an era of molecular diagnostics.
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Angeletti S. Matrix assisted laser desorption time of flight mass spectrometry (MALDI-TOF MS) in clinical microbiology. J Microbiol Methods 2016; 138:20-29. [PMID: 27613479 DOI: 10.1016/j.mimet.2016.09.003] [Citation(s) in RCA: 143] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2016] [Revised: 09/01/2016] [Accepted: 09/03/2016] [Indexed: 10/21/2022]
Abstract
The microbiological management of patients with suspected bacterial infection includes the identification of the pathogen and the determination of the antibiotic susceptibility. These traditional approaches, based on the pure culture of the microorganism, require at least 36-48h. A new method, Matrix Assisted Laser Desorption Ionization Time of Flight Mass Spectrometry (MALDI-TOF MS), has been recently developed to profile bacterial proteins from whole cell extracts and obtain a bacterial fingerprint able to discriminate microorganisms from different genera and species. By whole cell-mass spectrometry, microbial identification can be achieved within minutes from cultured isolate, rather than traditional phenotypic or genotypic characterizations. From the year 2009 an explosion of applications of this technology has been observed with promising results. Several studies have been performed and showed that MALDI-TOF represents a reliable alternative method for rapid bacteria and fungi identification in clinical setting. A future area of expansion is represented by the application of MALDI-TOF technology to the antibiotic susceptibility test. In conclusion, the revision of the literature available up to date demonstrated that MALDI-TOF MS represents an innovative technology for the rapid and accurate identification of bacterial and fungal isolates in clinical settings. By an earlier microbiological diagnosis, MALDI-TOF MS contributes to a reduced mortality and hospitalization time of the patients and consequently has a significant impact on cost savings and public health.
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Affiliation(s)
- Silvia Angeletti
- Clinical Pathology and Microbiology Unit, University Campus Bio-Medico of Rome, Italy.
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Bakour S, Sankar SA, Rathored J, Biagini P, Raoult D, Fournier PE. Identification of virulence factors and antibiotic resistance markers using bacterial genomics. Future Microbiol 2016; 11:455-66. [PMID: 26974504 DOI: 10.2217/fmb.15.149] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
In recent years, the number of multidrug-resistant bacteria has increased rapidly and several epidemics were signaled in different regions of the world. Faced with this situation that presents a major global public health concern, the development and the use of new and rapid technologies is more than urgent. The use of the next-generation sequencing platforms by microbiologists and infectious disease specialists has allowed great progress in the medical field. Here, we review the usefulness of whole-genome sequencing for the detection of virulence and antibiotic resistance associated genes.
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Affiliation(s)
- Sofiane Bakour
- Unité de recherche sur les maladies infectieuses et tropicales émergentes (URMITE), UM 63, CNRS 7278, IRD 198, INSERM 1095, IHU Méditerranée Infection, Faculté de Médecine et de Pharmacie, Aix-Marseille-Université, Marseille, France
| | - Senthil Alias Sankar
- Unité de recherche sur les maladies infectieuses et tropicales émergentes (URMITE), UM 63, CNRS 7278, IRD 198, INSERM 1095, IHU Méditerranée Infection, Faculté de Médecine et de Pharmacie, Aix-Marseille-Université, Marseille, France
| | - Jaishriram Rathored
- Unité de recherche sur les maladies infectieuses et tropicales émergentes (URMITE), UM 63, CNRS 7278, IRD 198, INSERM 1095, IHU Méditerranée Infection, Faculté de Médecine et de Pharmacie, Aix-Marseille-Université, Marseille, France
| | - Philippe Biagini
- UMR CNRS 7268 Equipe "Emergence et coévolution virale," Etablissement Français du Sang Alpes-Méditerranée et Aix-Marseille Université, 27 Boulevard Jean Moulin, 13005 Marseille
| | - Didier Raoult
- Unité de recherche sur les maladies infectieuses et tropicales émergentes (URMITE), UM 63, CNRS 7278, IRD 198, INSERM 1095, IHU Méditerranée Infection, Faculté de Médecine et de Pharmacie, Aix-Marseille-Université, Marseille, France
| | - Pierre-Edouard Fournier
- Unité de recherche sur les maladies infectieuses et tropicales émergentes (URMITE), UM 63, CNRS 7278, IRD 198, INSERM 1095, IHU Méditerranée Infection, Faculté de Médecine et de Pharmacie, Aix-Marseille-Université, Marseille, France
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