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Gillespie SH, DiNardo AR, Georghiou SB, Sabiiti W, Kohli M, Panzner U, Kontsevaya I, Hittel N, Stuyver LJ, Tan JB, van Crevel R, Lange C, Thuong TNT, Heyckendorf J, Ruhwald M, Heinrich N. Developing biomarker assays to accelerate tuberculosis drug development: defining target product profiles. Lancet Microbe 2024:S2666-5247(24)00085-5. [PMID: 38735303 DOI: 10.1016/s2666-5247(24)00085-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 03/12/2024] [Accepted: 03/20/2024] [Indexed: 05/14/2024]
Abstract
Drug development for tuberculosis is hindered by the methodological limitations in the definitions of patient outcomes, particularly the slow organism growth and difficulty in obtaining suitable and representative samples throughout the treatment. We developed target product profiles for biomarker assays suitable for early-phase and late-phase clinical drug trials by consulting subject-matter experts on the desirable performance and operational characteristics of such assays for monitoring of tuberculosis treatment in drug trials. Minimal and optimal criteria were defined for scope, intended use, pricing, performance, and operational characteristics of the biomarkers. Early-stage trial assays should accurately quantify the number of viable bacilli, whereas late-stage trial assays should match the number, predict relapse-free cure, and replace culture conversion endpoints. The operational criteria reflect the infrastructure and resources available for drug trials. The effective tools should define the sterilising activity of the drug and lower the probability of treatment failure or relapse in people with tuberculosis. The target product profiles outlined in this Review should guide and de-risk the development of biomarker-based assays suitable for phase 2 and 3 clinical drug trials.
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Affiliation(s)
- Stephen H Gillespie
- Division of Infection and Global Health, School of Medicine, University of St Andrews, St Andrews, UK.
| | - Andrew R DiNardo
- Global TB Program, Texas Children's Hospital and Baylor College of Medicine, Houston, TX, USA; Department of Internal Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, GA Nijmegen, Netherlands
| | | | - Wilber Sabiiti
- Division of Infection and Global Health, School of Medicine, University of St Andrews, St Andrews, UK
| | | | - Ursula Panzner
- Division of Infectious Diseases and Tropical Medicine, University Hospital, Ludwig-Maximilians-Universität München (LMU), Munich, Germany; German Center for Infection Research (DZIF), Partner Site Munich, Munich, Germany
| | - Irina Kontsevaya
- German Center for Infection Research (DZIF), Partner Site Hamburg-Lübeck-Borstel-Riems, Borstel, Germany; Department of Infectious Disease, Faculty of Medicine, Imperial College London, London, UK
| | - Norbert Hittel
- Janssen Global Public Health R&D, Janssen Pharmaceutica NV, Beerse, Belgium
| | | | | | - Reinout van Crevel
- Department of Internal Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, GA Nijmegen, Netherlands; Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK
| | - Christoph Lange
- Global TB Program, Texas Children's Hospital and Baylor College of Medicine, Houston, TX, USA; Division of Clinical Infectious Diseases, Research Center Borstel, Borstel, Germany; German Center for Infection Research (DZIF), Clinical Tuberculosis Unit, Borstel, Germany; Respiratory Medicine & International Health, University of Lübeck, Lübeck, Germany
| | | | - Jan Heyckendorf
- Respiratory Medicine & International Health, University of Lübeck, Lübeck, Germany; Clinic for Internal Medicine I, University Hospital Schleswig-Holstein (UKSH) Campus Kiel, Kiel, Germany
| | | | - Norbert Heinrich
- Division of Infectious Diseases and Tropical Medicine, University Hospital, Ludwig-Maximilians-Universität München (LMU), Munich, Germany; German Center for Infection Research (DZIF), Partner Site Munich, Munich, Germany; Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, Immunology, Infection and Pandemic Research, Munich, Germany
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2
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Naidoo K, Perumal R, Cox H, Mathema B, Loveday M, Ismail N, Omar SV, Georghiou SB, Daftary A, O'Donnell M, Ndjeka N. The epidemiology, transmission, diagnosis, and management of drug-resistant tuberculosis-lessons from the South African experience. Lancet Infect Dis 2024:S1473-3099(24)00144-0. [PMID: 38527475 DOI: 10.1016/s1473-3099(24)00144-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Revised: 01/29/2024] [Accepted: 02/20/2024] [Indexed: 03/27/2024]
Abstract
Drug-resistant tuberculosis (DR-TB) threatens to derail tuberculosis control efforts, particularly in Africa where the disease remains out of control. The dogma that DR-TB epidemics are fueled by unchecked rates of acquired resistance in inadequately treated or non-adherent individuals is no longer valid in most high DR-TB burden settings, where community transmission is now widespread. A large burden of DR-TB in Africa remains undiagnosed due to inadequate access to diagnostic tools that simultaneously detect tuberculosis and screen for resistance. Furthermore, acquisition of drug resistance to new and repurposed drugs, for which diagnostic solutions are not yet available, presents a major challenge for the implementation of novel, all-oral, shortened (6-9 months) treatment. Structural challenges including poverty, stigma, and social distress disrupt engagement in care, promote poor treatment outcomes, and reduce the quality of life for people with DR-TB. We reflect on the lessons learnt from the South African experience in implementing state-of-the-art advances in diagnostic solutions, deploying recent innovations in pharmacotherapeutic approaches for rapid cure, understanding local transmission dynamics and implementing interventions to curtail DR-TB transmission, and in mitigating the catastrophic socioeconomic costs of DR-TB. We also highlight globally relevant and locally responsive research priorities for achieving DR-TB control in South Africa.
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Affiliation(s)
- Kogieleum Naidoo
- SAMRC-CAPRISA HIV/TB Pathogenesis and Treatment Research Unit, Centre for the AIDS Programme of Research in South Africa, Nelson R Mandela School of Medicine, University of KwaZulu-Natal, Durban, South Africa.
| | - Rubeshan Perumal
- SAMRC-CAPRISA HIV/TB Pathogenesis and Treatment Research Unit, Centre for the AIDS Programme of Research in South Africa, Nelson R Mandela School of Medicine, University of KwaZulu-Natal, Durban, South Africa
| | - Helen Cox
- Institute of Infectious Diseases and Molecular Medicine, Wellcome Centre for Infectious Disease Research and Division of Medical Microbiology, University of Cape Town, Cape Town, South Africa
| | - Barun Mathema
- Mailman School of Public Health, Columbia University, New York City, NY, USA
| | - Marian Loveday
- South African Medical Research Council, Durban, South Africa
| | - Nazir Ismail
- School of Pathology, University of Witwatersrand, Johannesburg, South Africa
| | - Shaheed Vally Omar
- Centre for Tuberculosis, National & WHO Supranational TB Reference Laboratory, National Institute for Communicable Diseases, Division of the National Health Laboratory Service, Johannesburg, South Africa
| | | | - Amrita Daftary
- SAMRC-CAPRISA HIV/TB Pathogenesis and Treatment Research Unit, Centre for the AIDS Programme of Research in South Africa, Nelson R Mandela School of Medicine, University of KwaZulu-Natal, Durban, South Africa; School of Global Health and Dahdaleh Institute of Global Health Research, York University, Toronto, ON, Canada
| | - Max O'Donnell
- SAMRC-CAPRISA HIV/TB Pathogenesis and Treatment Research Unit, Centre for the AIDS Programme of Research in South Africa, Nelson R Mandela School of Medicine, University of KwaZulu-Natal, Durban, South Africa; Division of Pulmonary, Allergy, and Critical Care Medicine, Columbia University Irving Medical Center, New York City, NY, USA; Department of Epidemiology, Columbia University Irving Medical Center, New York City, NY, USA
| | - Norbert Ndjeka
- TB Control and Management, Republic of South Africa National Department of Health, Pretoria, South Africa
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3
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Georghiou SB, de Vos M, Velen K, Miotto P, Colman RE, Cirillo DM, Ismail N, Rodwell TC, Suresh A, Ruhwald M. Designing molecular diagnostics for current tuberculosis drug regimens. Emerg Microbes Infect 2023; 12:2178243. [PMID: 36752055 PMCID: PMC9980415 DOI: 10.1080/22221751.2023.2178243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
Diagnostic development must occur in parallel with drug development to ensure the longevity of new treatment compounds. Despite an increasing number of novel and repurposed anti-tuberculosis compounds and regimens, there remains a large number of drugs for which no rapid and accurate molecular diagnostic option exists. The lack of rapid drug susceptibility testing for linezolid, bedaquiline, clofazimine, the nitroimidazoles (i.e pretomanid and delamanid) and pyrazinamide at any level of the healthcare system compromises the effectiveness of current tuberculosis and drug-resistant tuberculosis treatment regimens. In the context of current WHO tuberculosis treatment guidelines as well as promising new regimens, we identify the key diagnostic gaps for initial and follow-on tests to diagnose emerging drug resistance and aid in regimen selection. Additionally, we comment on potential gene targets for inclusion in rapid molecular drug susceptibility assays and sequencing assays for novel and repurposed drug compounds currently prioritized in current regimens, and evaluate the feasibility of mutation detection given the design of existing technologies. Based on current knowledge, we also propose design priorities for next generation molecular assays to support triage of tuberculosis patients to appropriate and effective treatment regimens. We encourage assay developers to prioritize development of these key molecular assays and support the continued evolution, uptake, and utility of sequencing to build knowledge of tuberculosis resistance mechanisms and further inform rapid treatment decisions in order to curb resistance to critical drugs in current regimens and achieve End TB targets.Trial registration: ClinicalTrials.gov identifier: NCT05117788..
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Affiliation(s)
| | | | | | - Paolo Miotto
- IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Rebecca E. Colman
- FIND, the Global Alliance for Diagnostics, Geneva, Switzerland,Department of Medicine, University of California, San Diego, La Jolla, CA, USA
| | | | | | - Timothy C. Rodwell
- FIND, the Global Alliance for Diagnostics, Geneva, Switzerland,Department of Medicine, University of California, San Diego, La Jolla, CA, USA
| | - Anita Suresh
- FIND, the Global Alliance for Diagnostics, Geneva, Switzerland
| | - Morten Ruhwald
- FIND, the Global Alliance for Diagnostics, Geneva, Switzerland, Morten Ruhwald FIND, the Global Alliance for Diagnostics, Campus Biotech, 9 Chemin des Mines, Geneva1202, Switzerland
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Heyckendorf J, Georghiou SB, Frahm N, Heinrich N, Kontsevaya I, Reimann M, Holtzman D, Imperial M, Cirillo DM, Gillespie SH, Ruhwald M. Tuberculosis Treatment Monitoring and Outcome Measures: New Interest and New Strategies. Clin Microbiol Rev 2022; 35:e0022721. [PMID: 35311552 PMCID: PMC9491169 DOI: 10.1128/cmr.00227-21] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Despite the advent of new diagnostics, drugs and regimens, tuberculosis (TB) remains a global public health threat. A significant challenge for TB control efforts has been the monitoring of TB therapy and determination of TB treatment success. Current recommendations for TB treatment monitoring rely on sputum and culture conversion, which have low sensitivity and long turnaround times, present biohazard risk, and are prone to contamination, undermining their usefulness as clinical treatment monitoring tools and for drug development. We review the pipeline of molecular technologies and assays that serve as suitable substitutes for current culture-based readouts for treatment response and outcome with the potential to change TB therapy monitoring and accelerate drug development.
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Affiliation(s)
- Jan Heyckendorf
- Department of Medicine I, University Hospital Schleswig-Holstein, Kiel, Germany
- Division of Clinical Infectious Diseases, Research Center Borstel, Borstel, Germany
- German Center for Infection Research (DZIF), Braunschweig, Germany
- International Health/Infectious Diseases, University of Lübeck, Lübeck, Germany
| | | | - Nicole Frahm
- Bill & Melinda Gates Medical Research Institute, Cambridge, Massachusetts, USA
| | - Norbert Heinrich
- Division of Infectious Diseases and Tropical Medicine, Medical Centre of the University of Munich (LMU), Munich, Germany
| | - Irina Kontsevaya
- Division of Clinical Infectious Diseases, Research Center Borstel, Borstel, Germany
- German Center for Infection Research (DZIF), Braunschweig, Germany
- International Health/Infectious Diseases, University of Lübeck, Lübeck, Germany
| | - Maja Reimann
- Division of Clinical Infectious Diseases, Research Center Borstel, Borstel, Germany
- German Center for Infection Research (DZIF), Braunschweig, Germany
- International Health/Infectious Diseases, University of Lübeck, Lübeck, Germany
| | - David Holtzman
- FIND, the Global Alliance for Diagnostics, Geneva, Switzerland
| | - Marjorie Imperial
- University of California San Francisco, San Francisco, California, USA, United States
| | - Daniela M. Cirillo
- Emerging Bacterial Pathogens Unit, Division of Immunology, Transplantation and Infectious Diseases, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Stephen H. Gillespie
- School of Medicine, University of St Andrewsgrid.11914.3c, St Andrews, Fife, Scotland
| | - Morten Ruhwald
- FIND, the Global Alliance for Diagnostics, Geneva, Switzerland
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5
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Georghiou SB, Rodwell TC, Korobitsyn A, Abbadi SH, Ajbani K, Alffenaar JW, Alland D, Alvarez N, Andres S, Ardizzoni E, Aubry A, Baldan R, Ballif M, Barilar I, Böttger EC, Chakravorty S, Claxton PM, Cirillo DM, Comas I, Coulter C, Denkinger CM, Derendinger B, Desmond EP, de Steenwinkel JE, Dheda K, Diacon AH, Dolinger DL, Dooley KE, Egger M, Ehsani S, Farhat MR, Fattorini L, Finci I, Le Ray LF, Furió V, Groenheit R, Gumbo T, Heysell SK, Hillemann D, Hoffmann H, Hsueh PR, Hu Y, Huang H, Hussain A, Ismail F, Izumi K, Jagielski T, Johnson JL, Kambli P, Kaniga K, Eranga Karunaratne G, Sharma MK, Keller PM, Kelly EC, Kholina M, Kohli M, Kranzer K, Laurenson IF, Limberis J, Grace Lin SY, Liu Y, López-Gavín A, Lyander A, Machado D, Martinez E, Masood F, Mitarai S, Mvelase NR, Niemann S, Nikolayevskyy V, Maurer FP, Merker M, Miotto P, Omar SV, Otto-Knapp R, Palaci M, Palacios Gutiérrez JJ, Peacock SJ, Peloquin CA, Perera J, Pierre-Audigier C, Pholwat S, Posey JE, Prammananan T, Rigouts L, Robledo J, Rockwood N, Rodrigues C, Salfinger M, Schechter MC, Seifert M, Sengstake S, Shinnick T, Shubladze N, Sintchenko V, Sirgel F, Somasundaram S, Sterling TR, Spitaleri A, Streicher E, Supply P, Svensson E, Tagliani E, Tahseen S, Takaki A, Theron G, Torrea G, Van Deun A, van Ingen J, Van Rie A, van Soolingen D, Vargas Jr R, Venter A, Veziris N, Villellas C, Viveiros M, Warren R, Wen S, Werngren J, Wilkinson RJ, Yang C, Yılmaz FF, Zhang T, Zimenkov D, Ismail N, Köser CU, Schön T. Updating the approaches to define susceptibility and resistance to anti-tuberculosis agents: implications for diagnosis and treatment. Eur Respir J 2022; 59:2200166. [PMID: 35422426 PMCID: PMC9059840 DOI: 10.1183/13993003.00166-2022] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Accepted: 03/05/2022] [Indexed: 11/07/2022]
Abstract
Approximately 85 000 deaths globally in 2019 were due to drug-resistant tuberculosis (TB), which corresponds to 7% of global deaths attributable to bacterial antimicrobial resistance [1]. Yet concerns have been mounting that drug-resistant TB was being underestimated because the approaches to define susceptibility and resistance to anti-TB agents had not kept up with those used for other major bacterial pathogens [2–9]. Here, we outline the recent, evidence-based initiatives spearheaded by the World Health Organization (WHO) and others to update breakpoints (traditionally referred to as critical concentrations (CCs)) that are used for phenotypic antimicrobial susceptibility testing (AST), also called drug susceptibility testing in the TB literature. Inappropriately high breakpoints have resulted in systematic false-susceptible AST results to anti-TB drugs. MIC, PK/PD and clinical outcome data should be combined when setting breakpoints to minimise the emergence and spread of antimicrobial resistance. https://bit.ly/3i43wb6
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Penn-Nicholson A, Georghiou SB, Ciobanu N, Kazi M, Bhalla M, David A, Conradie F, Ruhwald M, Crudu V, Rodrigues C, Myneedu VP, Scott L, Denkinger CM, Schumacher SG. Detection of isoniazid, fluoroquinolone, ethionamide, amikacin, kanamycin, and capreomycin resistance by the Xpert MTB/XDR assay: a cross-sectional multicentre diagnostic accuracy study. Lancet Infect Dis 2021; 22:242-249. [PMID: 34627496 DOI: 10.1016/s1473-3099(21)00452-7] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 06/30/2021] [Accepted: 07/19/2021] [Indexed: 11/17/2022]
Abstract
BACKGROUND The WHO End TB Strategy requires drug susceptibility testing and treatment of all people with tuberculosis, but second-line diagnostic testing with line-probe assays needs to be done in experienced laboratories with advanced infrastructure. Fewer than half of people with drug-resistant tuberculosis receive appropriate treatment. We assessed the diagnostic accuracy of the rapid Xpert MTB/XDR automated molecular assay (Cepheid, Sunnyvale, CA, USA) to overcome these limitations. METHODS We did a prospective study involving individuals presenting with pulmonary tuberculosis symptoms and at least one risk factor for drug resistance in four sites in India (New Delhi and Mumbai), Moldova, and South Africa between July 31, 2019, and March 21, 2020. The Xpert MTB/XDR assay was used as a reflex test to detect resistance to isoniazid, fluoroquinolones, ethionamide, amikacin, kanamycin, and capreomycin in adults with positive results for Mycobacterium tuberculosis complex on Xpert MTB/RIF or Ultra (Cepheid). Diagnostic performance was assessed against a composite reference standard of phenotypic drug-susceptibility testing and whole-genome sequencing. This study is registered with ClinicalTrials.gov, number NCT03728725. FINDINGS Of 710 participants, 611 (86%) had results from both Xpert MTB/XDR and the reference standard for any drug and were included in analysis. Sensitivity for Xpert MTB/XDR detection of resistance was 94% (460 of 488, 95% CI 92-96) for isoniazid, 94% (222 of 235, 90-96%) for fluoroquinolones, 54% (178 of 328, 50-61) for ethionamide, 73% (60 of 82, 62-81) for amikacin, 86% (181 of 210, 81-91) for kanamycin, and 61% (53 of 87, 49-70) for capreomycin. Specificity was 98-100% for all drugs. Performance was equivalent to that of line-probe assays. The non-determinate rate of Xpert MTB/XDR (ie, invalid M tuberculosis complex detection) was 2·96%. INTERPRETATION The Xpert MTB/XDR assay showed high diagnostic accuracy and met WHO's minimum target product profile criteria for a next-generation drug susceptibility test. The assay has the potential to diagnose drug-resistant tuberculosis rapidly and accurately and enable optimum treatment. FUNDING German Federal Ministry of Education and Research through KfW, Dutch Ministry of Foreign Affairs, and Australian Department of Foreign Affairs and Trade.
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Affiliation(s)
| | | | - Nelly Ciobanu
- Phthisiopneumology Institute "Chiril Draganiuc", Chișinău, Moldova
| | - Mubin Kazi
- PD Hinduja Hospital and Medical Research Centre, Mumbai, India
| | - Manpreet Bhalla
- National Institute of TB and Respiratory Diseases, New Delhi, India
| | - Anura David
- University of the Witwatersrand, School of Pathology, Johannesburg, South Africa
| | - Francesca Conradie
- University of the Witwatersrand, School of Pathology, Johannesburg, South Africa
| | | | - Valeriu Crudu
- Phthisiopneumology Institute "Chiril Draganiuc", Chișinău, Moldova
| | | | | | - Lesley Scott
- University of the Witwatersrand, School of Pathology, Johannesburg, South Africa
| | - Claudia M Denkinger
- FIND, Geneva, Switzerland; Heidelberg University Hospital, Center of Infectious Diseases, Heidelberg, Germany
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Georghiou SB, Penn-Nicholson A, de Vos M, Macé A, Syrmis MW, Jacob K, Mape A, Parmar H, Cao Y, Coulter C, Ruhwald M, Pandey SK, Schumacher SG, Denkinger CM. Analytical performance of the Xpert MTB/XDR® assay for tuberculosis and expanded resistance detection. Diagn Microbiol Infect Dis 2021; 101:115397. [PMID: 34130215 DOI: 10.1016/j.diagmicrobio.2021.115397] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 03/15/2021] [Accepted: 04/10/2021] [Indexed: 11/16/2022]
Abstract
In a manufacturer-independent laboratory validation study, the Xpert MTB/XDR® assay demonstrated equivalent limit of detection to Xpert MTB/RIF®, detected 100% of tested resistance mutations and showed some utility for resistance detection in strain mixtures. The Xpert MTB/XDR assay is a reliable, sensitive assay for tuberculosis and expanded resistance detection.
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Affiliation(s)
| | | | | | | | - Melanie W Syrmis
- Queensland Mycobacterium Reference Laboratory, Pathology Queensland, Queensland, Australia; The University of Queensland Centre for Clinical Research, University of Queensland, Queensland, Australia
| | - Kevin Jacob
- Queensland Mycobacterium Reference Laboratory, Pathology Queensland, Queensland, Australia
| | - Alyanna Mape
- Queensland Mycobacterium Reference Laboratory, Pathology Queensland, Queensland, Australia
| | - Heta Parmar
- New Jersey Medical School, Rutgers University, New Jersey, USA
| | - Yuan Cao
- New Jersey Medical School, Rutgers University, New Jersey, USA
| | - Chris Coulter
- Queensland Mycobacterium Reference Laboratory, Pathology Queensland, Queensland, Australia
| | | | - Sushil K Pandey
- Queensland Mycobacterium Reference Laboratory, Pathology Queensland, Queensland, Australia
| | | | - Claudia M Denkinger
- FIND, Geneva, Switzerland; Division of Tropical Medicine, Center of Infectious Diseases, University Hospital of Heidelberg, Heidelberg, Germany
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8
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Köser CU, Georghiou SB, Schön T, Salfinger M. On the Consequences of Poorly Defined Breakpoints for Rifampin Susceptibility Testing of Mycobacterium tuberculosis Complex. J Clin Microbiol 2021; 59:e02328-20. [PMID: 33568463 PMCID: PMC8092724 DOI: 10.1128/jcm.02328-20] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
In a recent report of a systematic review of critical concentrations (CCs), the World Health Organization (WHO) lowered the rifampin (RIF) CC for antimicrobial susceptibility testing (AST) of the Mycobacterium tuberculosis complex using Middlebrook 7H10 medium and the Bactec Mycobacterial Growth Indicator Tube (MGIT) 960 system from 1 to 0.5 μg/ml. The previous RIF CC for 7H10 had been in use for over half a century. Because it had served as the de facto reference standard, it contributed to the endorsement of inappropriately high CCs for other AST methods, including the U.S. Food and Drug Administration (FDA)-approved MGIT system. Moreover, this resulted in confusion about the interpretation of seven borderline resistance mutations in rpoB (i.e., L430P, D435Y, H445L, H445N, H445S, L452P, and I491F). In this issue of the Journal of Clinical Microbiology, Shea et al. (J Clin Microbiol 59:e01885-20, 2021, https://doi.org/10.1128/JCM.01885-20) provide evidence that the CC endorsed by the Clinical and Laboratory Standards Institute for the Sensititre MYCOTB system, which is not FDA approved but is CE-IVD marked in the European Union, is likely also too high. These findings underscore the importance of calibrating AST methods against a rigorously defined reference standard, as recently proposed by the European Committee on Antimicrobial Susceptibility Testing, as well as the value of routine next-generation sequencing for investigating discordant AST results.
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Affiliation(s)
- Claudio U Köser
- Department of Genetics, University of Cambridge, Cambridge, United Kingdom
| | | | - Thomas Schön
- Department of Infectious Diseases, Kalmar County Hospital, Linköping University, Kalmar, Sweden
- Unit of Infection and Inflammation, Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden
- Department of Infectious Diseases, Linköping University Hospital, Linköping, Sweden
| | - Max Salfinger
- University of South Florida College of Public Health and Morsani College of Medicine, Tampa, Florida, USA
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9
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Georghiou SB, Gomathi NS, Rajendran P, Nagalakshmi V, Prabakaran L, Prem Kumar MM, Macé A, Tripathy S, Ruhwald M, Schumacher SG, Penn-Nicholson A. Accuracy of the Truenat MTB-RIF Dx assay for detection of rifampicin resistance-associated mutations. Tuberculosis (Edinb) 2021; 127:102064. [PMID: 33652272 DOI: 10.1016/j.tube.2021.102064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2020] [Revised: 01/15/2021] [Accepted: 02/15/2021] [Indexed: 10/22/2022]
Affiliation(s)
| | | | - Priya Rajendran
- Indian Council for Medical Research-National Institute for Research in Tuberculosis, Chennai, India
| | - V Nagalakshmi
- Indian Council for Medical Research-National Institute for Research in Tuberculosis, Chennai, India
| | - L Prabakaran
- Foundation for Innovative New Diagnostics -India, New Delhi, India
| | - M Michel Prem Kumar
- Indian Council for Medical Research-National Institute for Research in Tuberculosis, Chennai, India
| | - Aurélien Macé
- Foundation for Innovative New Diagnostics, Geneva, Switzerland
| | - Srikanth Tripathy
- Indian Council for Medical Research-National Institute for Research in Tuberculosis, Chennai, India
| | - Morten Ruhwald
- Foundation for Innovative New Diagnostics, Geneva, Switzerland
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Catanzaro DG, Colman RE, Linger Y, Georghiou SB, Kukhtin AV, Seifert M, Holmberg RC, Mshaiel H, Chiles P, Hillery N, Cooney CG, Rodwell TC. Laboratory Evaluation of a Lateral-Flow Cell for Molecular Detection of First-Line and Second-Line Antituberculosis Drug Resistance. J Clin Microbiol 2020; 58:e01417-20. [PMID: 32817085 PMCID: PMC7587100 DOI: 10.1128/jcm.01417-20] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Accepted: 08/12/2020] [Indexed: 01/05/2023] Open
Abstract
Despite the WHO's call for universal drug susceptibility testing for all patients being evaluated for tuberculosis (TB), a lack of rapid diagnostic tests which can fully describe TB resistance patterns is a major challenge in ensuring that all persons diagnosed with drug-resistant TB are started on an appropriate treatment regime. We evaluated the accuracy of the Akonni Biosystems XDR-TB TruArray and lateral-flow cell (XDR-LFC), a novel multiplex assay to simultaneously detect mutations across seven genes that confer resistance to both first- and second-line anti-TB drugs. The XDR-LFC includes 271 discrete three-dimensional gel elements with target-specific probes for identifying mutations in katG, inhA promoter, and ahpC promoter (isoniazid), rpoB (rifampin), gyrA (fluoroquinolones), rrs and eis promoter (kanamycin), and rrs (capreomycin and amikacin). We evaluated XDR-LFC performance with 87 phenotypically and genotypically characterized clinical Mycobacterium tuberculosis isolates. The overall assay levels of accuracy for mutation detection in specific genes were 98.6% for eis promoter and 100.0% for the genes katG, inhA promoter, ahpC promoter, rpoB, gyrA, and rrs The sensitivity and specificity against phenotypic reference were 100% and 100% for isoniazid, 98.4% and 50% for rifampin (specificity increased to 100% once the strains with documented low-level resistance mutations in rpoB were excluded), 96.2% and 100% for fluoroquinolones, 92.6% and 100% for kanamycin, 93.9% and 97.4% for capreomycin, and 80% and 100% for amikacin. The XDR-LFC solution appears to be a promising new tool for accurate detection of resistance to both first- and second-line anti-TB drugs.
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Affiliation(s)
- Donald G Catanzaro
- Department of Biological Sciences, University of Arkansas, Fayetteville, Arkansas, USA
| | - Rebecca E Colman
- Department of Medicine, University of California, San Diego, La Jolla, California, USA
| | | | | | | | - Marva Seifert
- Department of Medicine, University of California, San Diego, La Jolla, California, USA
| | | | - Haifa Mshaiel
- Department of Medicine, University of California, San Diego, La Jolla, California, USA
| | - Peter Chiles
- Department of Medicine, University of California, San Diego, La Jolla, California, USA
| | - Naomi Hillery
- Department of Family Medicine and Public Health, University of California, San Diego, La Jolla, California, USA
| | | | - Timothy C Rodwell
- Department of Medicine, University of California, San Diego, La Jolla, California, USA
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Georghiou SB, Schumacher SG, Rodwell TC, Colman RE, Miotto P, Gilpin C, Ismail N, Rodrigues C, Warren R, Weyer K, Zignol M, Arafah S, Cirillo DM, Denkinger CM. Guidance for Studies Evaluating the Accuracy of Rapid Tuberculosis Drug-Susceptibility Tests. J Infect Dis 2020; 220:S126-S135. [PMID: 31593599 DOI: 10.1093/infdis/jiz106] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
The development and implementation of rapid molecular diagnostics for tuberculosis (TB) drug-susceptibility testing is critical to inform treatment of patients and to prevent the emergence and spread of resistance. Optimal trial planning for existing tests and those in development will be critical to rapidly gather the evidence necessary to inform World Health Organization review and to support potential policy recommendations. The evidence necessary includes an assessment of the performance for TB and resistance detection as well as an assessment of the operational characteristics of these platforms. The performance assessment should include analytical studies to confirm the limit of detection and assay ability to detect mutations conferring resistance across globally representative strains. The analytical evaluation is typically followed by multisite clinical evaluation studies to confirm diagnostic performance in sites and populations of intended use. This paper summarizes the considerations for the design of these analytical and clinical studies.
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Affiliation(s)
| | | | | | | | - Paolo Miotto
- IRCCS San Raffaele Scientific Institute, Milan, Italy
| | | | - Nazir Ismail
- University of Pretoria, South Africa.,National Institute for Communicable Diseases, National Health Laboratory Service, Johannesburg, South Africa.,University Hospital Heidelberg, Division of Tropical Medicine, Centre of Infectious Diseases, Germany
| | | | - Rob Warren
- SAMRC Centre for Tuberculosis Research, Stellenbosch University, Tygerberg, South Africa
| | - Karin Weyer
- World Health Organization, Geneva, Switzerland
| | | | | | | | - Claudia M Denkinger
- FIND, Geneva, Switzerland.,University of Heidelberg, Centre of Infectious Diseases, Germany
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Seifert M, Georghiou SB, Garfein RS, Catanzaro D, Rodwell TC. Impact of Fluoroquinolone Use on Mortality Among a Cohort of Patients With Suspected Drug-Resistant Tuberculosis. Clin Infect Dis 2018; 65:772-778. [PMID: 28475735 DOI: 10.1093/cid/cix422] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Accepted: 04/28/2017] [Indexed: 11/13/2022] Open
Abstract
Background Previous retrospective and in vitro studies suggest that use of later-generation fluoroquinolones may reduce mortality risk and improve treatment outcomes for drug-resistant tuberculosis (TB) patients, including individuals resistant to a fluoroquinolone. Meta-analysis results are mixed and few studies have examined this relationship prospectively. Methods As part of a comparative diagnostic study, we conducted a prospective cohort study with 834 Mycobacterium tuberculosis-infected patients from selected hospitals and clinics with high prevalence of drug-resistant TB in India, Moldova, and South Africa. We used Cox proportional hazards regression models to assess the association between later-generation fluoroquinolone (moxifloxacin or levofloxacin) use and patient mortality, adjusting for risk factors typically associated with poor treatment outcomes. Results After adjusting for phenotypic resistance profile, low body mass index (<18.5 kg/m2), human immunodeficiency virus status, and study site, participants treated with a later-generation fluoroquinolone had half the risk of mortality compared with participants either not treated with any fluoroquinolone or treated only with an earlier-generation fluoroquinolone (adjusted hazard ratio, 0.46 [95% confidence interval, .26-.80]) during follow-up. Conclusions Use of later-generation fluoroquinolones significantly reduced patient mortality risk in our cohort, suggesting that removal of a later-generation fluoroquinolone from a treatment regimen because of demonstrated resistance to an earlier-generation fluoroquinolone might increase mortality risk. Further studies should evaluate the effectiveness of later-generation fluoroquinolones among patients with and without resistance to early-generation fluoroquinolones. Clinical Trials Registration NCT02170441.
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Affiliation(s)
- Marva Seifert
- Department of Medicine, University of California, San Diego, La Jolla
| | | | - Richard S Garfein
- Department of Medicine, University of California, San Diego, La Jolla
| | | | - Timothy C Rodwell
- Department of Medicine, University of California, San Diego, La Jolla
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13
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Catanzaro DG, Trollip AP, Seifert M, Georghiou SB, Garfein RS, Rodwell TC, Catanzaro A, Eisenach KD. Evaluation of the microscopic observation drug susceptibility assay for the detection of first- and second-line drug susceptibility for Mycobacterium tuberculosis. Eur Respir J 2017; 49:49/4/1602215. [PMID: 28381434 DOI: 10.1183/13993003.02215-2016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Accepted: 12/16/2016] [Indexed: 12/31/2022]
Affiliation(s)
- Donald G Catanzaro
- Dept of Biological Sciences, University of Arkansas, Fayetteville, AR, USA
| | - Andre P Trollip
- Foundation for Innovative New Diagnostics, Cape Town, South Africa
| | - Marva Seifert
- University of California San Diego School of Medicine, La Jolla, CA, USA
| | | | - Richard S Garfein
- University of California San Diego School of Medicine, La Jolla, CA, USA
| | - Timothy C Rodwell
- University of California San Diego School of Medicine, La Jolla, CA, USA
| | - Antonino Catanzaro
- University of California San Diego School of Medicine, La Jolla, CA, USA
| | - Kathleen D Eisenach
- University of Arkansas for Medical Sciences, Dept of Pathology, Little Rock, AR, USA
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Havumaki J, Hillemann D, Ismail N, Omar SV, Georghiou SB, Schumacher SG, Boehme C, Denkinger CM. Comparative accuracy of the REBA MTB MDR and Hain MTBDRplus line probe assays for the detection of multidrug-resistant tuberculosis: A multicenter, non-inferiority study. PLoS One 2017; 12:e0173804. [PMID: 28339465 PMCID: PMC5365104 DOI: 10.1371/journal.pone.0173804] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Accepted: 02/23/2017] [Indexed: 11/24/2022] Open
Abstract
Introduction Despite recent diagnostic advances, the majority of multidrug-resistant tuberculosis (MDR-TB) cases remain undiagnosed. Line probes assays (LiPAs) hold great promise to curb the spread of MDR-TB as they can rapidly detect MDR-TB even when laboratory infrastructure is limited, yet few of these assays are currently widely available or supported by World Health Organization (WHO) policy. Methods The aim of this prospective, blinded, non-inferiority study was to compare the performance of YD Diagnostics REBA MTB MDR LiPA (YD) to the WHO-endorsed Hain MTBDRplus V1 LiPA (Hain V1) for the detection of rifampicin and isoniazid resistance. In phase 1, YD and Hain V1 diagnostic performance was assessed with selected culture isolates and results were compared to phenotypic drug susceptibility testing (DST) results and targeted sequencing data. In phase 2, both assays were tested on processed sputum samples and results were compared to phenotypic DST results. Results In phase 1, YD did not achieve non-inferiority to Hain V1. For isoniazid resistance detection, Hain V1 had a sensitivity of 89% (95%CI 83.8–93%) and specificity of 99.4% (95%CI 96.9–100%). While YD had a similar sensitivity of 92% (95%CI 87.3–95.4%), the specificity was inferior at 92.6% (95%CI 87.6–96%). For rifampicin resistance detection, Hain V1 had a sensitivity of 90.2% (95%CI 84.8–94.2%) and specificity of 98.5% (95%CI 95.7–99.7%) while YD had an inferior sensitivity of 72.4% (95%CI 65.1–78.9%) and a comparable specificity of 98% (95%CI 95–99.5%). Similar results were observed in phase 2. For MDR-TB detection, the sensitivity and specificity of Hain V1 was 93.4% (95%CI 88.2–96.2%) and 96.2% (95%CI 88.2–96.8%), respectively, compared to 75.7% (95%CI 68–82.2%) and 92% (95%CI 88.2–94.9%) for YD. Conclusions YD did not achieve non-inferiority with Hain V1. Further improvements and repeat evaluation of YD is necessary prior to recommending its use for clinical settings.
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Affiliation(s)
- Joshua Havumaki
- Foundation for Innovative New Diagnostics, Geneva, Switzerland
| | - Doris Hillemann
- National Reference Laboratory for Mycobacteria, Forschungszentrum Borstel, Borstel, Germany
| | - Nazir Ismail
- Centre for Tuberculosis, National Institute for Communicable Diseases, Johannesburg, South Africa
| | - Shaheed Vally Omar
- Centre for Tuberculosis, National Institute for Communicable Diseases, Johannesburg, South Africa
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Seifert M, Ajbani K, Georghiou SB, Catanzaro D, Rodrigues C, Crudu V, Victor TC, Garfein RS, Catanzaro A, Rodwell TC. A performance evaluation of MTBDRplus version 2 for the diagnosis of multidrug-resistant tuberculosis. Int J Tuberc Lung Dis 2017; 20:631-7. [PMID: 27084817 DOI: 10.5588/ijtld.15.0788] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
OBJECTIVE To evaluate the performance of a recently updated rapid molecular diagnostic test, GenoType® MTBDRplus version 2, designed to detect drug resistance in both acid-fast bacilli (AFB) smear-negative and -positive specimens. DESIGN Sputum samples from 1128 patients at risk for multidrug-resistant tuberculosis (MDR-TB) were tested using MTBDRplus v2 and compared with reference standard MGIT™ 960™ drug susceptibility testing. The relationship of participant human immunodeficiency virus (HIV) status, diabetic status, previous treatment, and smear gradation to the likelihood of obtaining an interpretable result was assessed using logistic regression. RESULTS The sensitivity and specificity of MTBDRplus v2 for detecting MDR-TB, when compared to a reference standard, were respectively 96.0% (95%CI 93.5-97.6) and 99.2% (95%CI 97.0-99.9) in AFB smear-positive specimens and 82.8% (95%CI 63.5-93.5) and 98.3% (95%CI 89.9-99.9) in AFB smear-negative specimens. A dose-response relationship was observed between the proportion of interpretable test results and AFB smear bacterial load after adjusting for age, sex, body mass index, HIV status, previous treatment and diabetic status. CONCLUSION While MTBDRplus v2 performs well among both AFB smear-positive and -negative specimens, smear gradation appears to influence both the probability of obtaining an interpretable result and test sensitivity, indicating a significant association between bacillary load and test performance.
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Affiliation(s)
- M Seifert
- University of California, San Diego, California, USA
| | - K Ajbani
- Hinduja National Hospital, Mumbai, India
| | - S B Georghiou
- University of California, San Diego, California, USA
| | - D Catanzaro
- University of Arkansas, Fayetteville, Arkansas, USA
| | | | - V Crudu
- Institute of Phthisiopneumology, Chisinau, Moldova
| | - T C Victor
- Stellenbosch University, Cape Town, South Africa
| | - R S Garfein
- University of California, San Diego, California, USA
| | - A Catanzaro
- University of California, San Diego, California, USA
| | - T C Rodwell
- University of California, San Diego, California, USA
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16
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Nikam C, Patel R, Sadani M, Ajbani K, Kazi M, Soman R, Shetty A, Georghiou SB, Rodwell TC, Catanzaro A, Rodrigues C. Redefining MTBDRplus test results: what do indeterminate results actually mean? Int J Tuberc Lung Dis 2017; 20:154-9. [PMID: 26792465 DOI: 10.5588/ijtld.15.0319] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Although line-probe assays (LPAs) are promising, little research has been conducted to elucidate the true nature of indeterminate LPA results or assess the ability of these assays to perform on a wide range of clinical samples. OBJECTIVE To evaluate the performance of the commercially available GenoType(®) MTBDRplus LPA against conventional BACTEC™ MGIT™ 960 culture and drug susceptibility testing (DST) among 308 pulmonary tuberculosis (PTB) and 32 extra-pulmonary TB samples. RESULTS Invalid LPA results (defined as those with a missing Mycobacterium tuberculosis identification band) were obtained for 18 PTB samples, which were excluded from further analysis. The sensitivity and specificity of the MTBDRplus assay for multidrug-resistant TB, based upon the results obtained for the remaining 322 samples, was respectively 95.2% and 95.1%. Of 290 PTB samples, 40 (13.7%) were indeterminate on LPA (defined as the absence of both wild-type and corresponding mutation bands) for isoniazid (INH) and/or rifampicin (RMP), and were further evaluated by pyrosequencing (PSQ). Contrary to standard LPA interpretation, INH and RMP susceptibility were confirmed by both DST and PSQ in respectively 7.5% (3/40) and 27.5% (11/40) of indeterminate samples. CONCLUSION PSQ was found to be a valuable and rapid technique to resolve discrepancies in LPA test results that were not interpretable.
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Affiliation(s)
- C Nikam
- Department of Microbiology, P D Hinduja Hospital and Medical Research Centre, Mumbai, India
| | - R Patel
- Department of Microbiology, P D Hinduja Hospital and Medical Research Centre, Mumbai, India
| | - M Sadani
- Department of Microbiology, P D Hinduja Hospital and Medical Research Centre, Mumbai, India
| | - K Ajbani
- Department of Microbiology, P D Hinduja Hospital and Medical Research Centre, Mumbai, India
| | - M Kazi
- Department of Microbiology, P D Hinduja Hospital and Medical Research Centre, Mumbai, India
| | - R Soman
- Department of Microbiology, P D Hinduja Hospital and Medical Research Centre, Mumbai, India
| | - A Shetty
- Department of Microbiology, P D Hinduja Hospital and Medical Research Centre, Mumbai, India
| | - S B Georghiou
- Department of Medicine, University of California San Diego, La Jolla, California, USA
| | - T C Rodwell
- Department of Medicine, University of California San Diego, La Jolla, California, USA
| | - A Catanzaro
- Department of Medicine, University of California San Diego, La Jolla, California, USA
| | - C Rodrigues
- Department of Microbiology, P D Hinduja Hospital and Medical Research Centre, Mumbai, India
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Kambli P, Ajbani K, Nikam C, Sadani M, Shetty A, Udwadia Z, Georghiou SB, Rodwell TC, Catanzaro A, Rodrigues C. Corrigendum to “Correlating rrs and eis promoter mutations in clinical isolates of Mycobacterium tuberculosis with phenotypic susceptibility levels to the second-line injectables” [Int. J. Mycobacteriol. 5(1) 2016 1–6]. Int J Mycobacteriol 2016; 5:370-372. [DOI: 10.1016/j.ijmyco.2016.06.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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18
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Georghiou SB, Seifert M, Lin SY, Catanzaro D, Garfein RS, Jackson RL, Crudu V, Rodrigues C, Victor TC, Catanzaro A, Rodwell TC. Shedding light on the performance of a pyrosequencing assay for drug-resistant tuberculosis diagnosis. BMC Infect Dis 2016; 16:458. [PMID: 27576542 PMCID: PMC5006534 DOI: 10.1186/s12879-016-1781-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2016] [Accepted: 08/15/2016] [Indexed: 12/29/2022] Open
Abstract
Background Rapid molecular diagnostics, with their ability to quickly identify genetic mutations associated with drug resistance in Mycobacterium tuberculosis clinical specimens, have great potential as tools to control multi- and extensively drug-resistant tuberculosis (M/XDR-TB). The Qiagen PyroMark Q96 ID system is a commercially available pyrosequencing (PSQ) platform that has been validated for rapid M/XDR-TB diagnosis. However, the details of the assay’s diagnostic and technical performance have yet to be thoroughly investigated in diverse clinical environments. Methods This study evaluates the diagnostic performance of the PSQ assay for 1128 clinical specimens from patients from three areas of high TB burden. We report on the diagnostic performance of the PSQ assay between the three sites and identify variables associated with poor PSQ technical performance. Results In India, the sensitivity of the PSQ assay ranged from 89 to 98 % for the detection of phenotypic resistance to isoniazid, rifampicin, fluoroquinolones, and the injectables. In Moldova, assay sensitivity ranged from 7 to 94 %, and in South Africa, assay sensitivity ranged from 71 to 92 %. Specificity was high (94–100 %) across all sites. The addition of eis promoter sequencing information greatly improved the sensitivity of kanamycin resistance detection in Moldova (7 % to 79 %). Nearly all (89.4 %) sequencing reactions conducted on smear-positive, culture-positive specimens and most (70.8 %) reactions conducted on smear-negative, culture-positive specimens yielded valid PSQ reads. An investigation into the variables influencing sequencing failures indicated smear negativity, culture negativity, site (Moldova), and sequencing of the rpoB, gyrA, and rrs genes were highly associated with poor PSQ technical performance (adj. OR > 2.0). Conclusions This study has important implications for the global implementation of PSQ as a molecular TB diagnostic, as it demonstrates how regional factors may impact PSQ diagnostic performance, while underscoring potential gene targets for optimization to improve overall PSQ assay technical performance. Trial registration ClinicalTrials.gov (#NCT02170441). Registered 12 June 2014. Electronic supplementary material The online version of this article (doi:10.1186/s12879-016-1781-y) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Sophia B Georghiou
- Department of Medicine, University of California San Diego, La Jolla, CA, USA.
| | - Marva Seifert
- Department of Medicine, University of California San Diego, La Jolla, CA, USA
| | - Shou-Yean Lin
- California Department of Public Health, Richmond, CA, USA
| | | | - Richard S Garfein
- Department of Medicine, University of California San Diego, La Jolla, CA, USA
| | - Roberta L Jackson
- Department of Medicine, University of California San Diego, La Jolla, CA, USA
| | - Valeriu Crudu
- Microbiology and Morphology Laboratory, Institute of Phthisiopneumology, Chisinau, Moldova
| | - Camilla Rodrigues
- Department of Microbiology, P.D. Hinduja Hospital and Medical Research Centre, Mumbai, India
| | - Thomas C Victor
- Division of Molecular Biology and Human Genetics, Stellenbosch University, Stellenbosch, South Africa
| | - Antonino Catanzaro
- Department of Medicine, University of California San Diego, La Jolla, CA, USA
| | - Timothy C Rodwell
- Department of Medicine, University of California San Diego, La Jolla, CA, USA
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Georghiou SB, Ajbani K, Rodrigues C, Rodwell TC. Performance of a pyrosequencing platform in diagnosing drug-resistant extra-pulmonary tuberculosis in India. Int J Tuberc Lung Dis 2016; 20:160-5. [PMID: 26792466 DOI: 10.5588/ijtld.15.0459] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
SETTING Pyrosequencing diagnostic assays have shown great utility in identifying and characterizing pulmonary drug-resistant tuberculosis (TB) infections. However, the method has yet to be evaluated for the diagnosis of drug-resistant extra-pulmonary TB (EPTB). OBJECTIVE To evaluate the performance of a pyrosequencing platform in establishing molecular drug resistance profiles for 79 clinical EPTB specimens at a referral center for drug-resistant TB in India. DESIGN Genotypic drug resistance profiles were established for all 79 non-pulmonary, culture-positive TB clinical specimens. Acid-fast bacilli smear microscopy, MGIT™ 960™ culture and drug susceptibility testing were performed on all specimens for reference. RESULTS In comparison to MGIT 960, the sensitivity and specificity of pyrosequencing in detecting drug resistance among specimens was found to be respectively 100% and 100%, 67% and 98%, and 100% and 100% for isoniazid, rifampicin, and the fluoroquinolones. No EPTB specimens were phenotypically resistant to any of the injectables, but the specificity of the assay was determined to be 100%, 98%, and 98% for amikacin, kanamycin, and capreomycin. CONCLUSIONS Pyrosequencing is a rapid, appropriate technology for the diagnosis of isoniazid-, fluoroquinolone-, and potentially injectable drug-resistant EPTB clinical specimens, and should be considered as an alternative to conventional growth-based diagnostic methods for EPTB when resistance to these drugs is suspected.
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Affiliation(s)
- S B Georghiou
- Division of Global Public Health, School of Medicine, University of California San Diego, La Jolla, California, USA
| | - K Ajbani
- Section Microbiology, Department of Laboratory Medicine, P D Hinduja National Hospital and Medical Research Centre, Mumbai, India
| | - C Rodrigues
- Section Microbiology, Department of Laboratory Medicine, P D Hinduja National Hospital and Medical Research Centre, Mumbai, India
| | - T C Rodwell
- Division of Global Public Health, School of Medicine, University of California San Diego, La Jolla, California, USA
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Kambli P, Ajbani K, Nikam C, Sadani M, Shetty A, Udwadia Z, Georghiou SB, Rodwell TC, Catanzaro A, Rodrigues C. Correlating rrs and eis promoter mutations in clinical isolates of Mycobacterium tuberculosis with phenotypic susceptibility levels to the second-line injectables. Int J Mycobacteriol 2015; 5:1-6. [PMID: 26927983 DOI: 10.1016/j.ijmyco.2015.09.001] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Accepted: 09/02/2015] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE/BACKGROUND The in vitro drug-susceptibility testing of Mycobacterium tuberculosis reports isolates as resistant or susceptible on the basis of single critical concentrations. It is evident that drug resistance in M. tuberculosis is quite heterogeneous, and involves low level, moderate level, and high level of drug-resistant phenotypes. Thus, the aim of our study was to correlate rrs (X52917) and eis (AF144099) promoter mutations, found in M. tuberculosis isolates, with corresponding minimum inhibitory concentrations of amikacin, kanamycin, and capreomycin. METHODS Ninety M. tuberculosis clinical isolates were analyzed in this study. The minimum inhibitory concentrations were determined by MGIT 960 for 59 isolates with resistance-associated mutations in the rrs and eis promoter gene regions, and 31 isolates with wild-type sequences, as determined by the GenoType MTBDRsl (version 1) assay. RESULTS The rrs A1401G mutation was identified in 48 isolates resistant to the second-line injectables. The eis promoter mutations C-14T (n=3), G-10C (n=3), G-10A (n=3), and C-12T (n=2) were found within 11 isolates with various resistance profiles to the second-line injectables. Thirty-one isolates had wild-type sequences for the rrs and eis promoter gene regions of interest, one of which was amikacin, kanamycin, and capreomycin resistant. The isolates with the rrs A1401G mutation had amikacin, kanamycin, and capreomycin minimum inhibitory concentrations of >40mg/L, >20mg/L, and 5-15mg/L, respectively. The isolates with eis promoter mutations had amikacin, kanamycin, and capreomycin minimum inhibitory concentrations of 0.25-1.0mg/L, 0.625-10mg/L, and 0.625-2.5mg/L, respectively. CONCLUSION This study provides a preliminary basis for the prediction of phenotypic-resistance levels to the second-line injectables based upon the presence of genetic mutations associated with amikacin, kanamycin, and capreomycin resistance. The results suggest that isolates with eis promoter mutations have consistently lower resistance levels to amikacin, kanamycin, and capreomycin than isolates with the rrs A1401G mutation.
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Affiliation(s)
- Priti Kambli
- Microbiology Section, Department of Laboratory Medicine, P. D. Hinduja Hospital & Medical Research Centre, Mumbai, India
| | - Kanchan Ajbani
- Microbiology Section, Department of Laboratory Medicine, P. D. Hinduja Hospital & Medical Research Centre, Mumbai, India
| | - Chaitali Nikam
- Microbiology Section, Department of Laboratory Medicine, P. D. Hinduja Hospital & Medical Research Centre, Mumbai, India
| | - Meeta Sadani
- Microbiology Section, Department of Laboratory Medicine, P. D. Hinduja Hospital & Medical Research Centre, Mumbai, India
| | - Anjali Shetty
- Microbiology Section, Department of Laboratory Medicine, P. D. Hinduja Hospital & Medical Research Centre, Mumbai, India
| | - Zarir Udwadia
- Pulmonology Section, Department of Medicine, P. D. Hinduja Hospital & Medical Research Centre, Mumbai, India
| | - Sophia B Georghiou
- Department of Medicine, University of California, San Diego, San Diego, CA, United States
| | - Timothy C Rodwell
- Department of Medicine, University of California, San Diego, San Diego, CA, United States
| | - Antonino Catanzaro
- Department of Medicine, University of California, San Diego, San Diego, CA, United States
| | - Camilla Rodrigues
- Microbiology Section, Department of Laboratory Medicine, P. D. Hinduja Hospital & Medical Research Centre, Mumbai, India.
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Catanzaro A, Rodwell TC, Catanzaro DG, Garfein RS, Jackson RL, Seifert M, Georghiou SB, Trollip A, Groessl E, Hillery N, Crudu V, Victor TC, Rodrigues C, Lin GSY, Valafar F, Desmond E, Eisenach K. Performance Comparison of Three Rapid Tests for the Diagnosis of Drug-Resistant Tuberculosis. PLoS One 2015; 10:e0136861. [PMID: 26322781 PMCID: PMC4556461 DOI: 10.1371/journal.pone.0136861] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Accepted: 08/10/2015] [Indexed: 01/17/2023] Open
Abstract
Background The aim of this study was to compare the performance of several recently developed assays for the detection of multi- and extensively drug-resistant tuberculosis (M/XDR-TB) in a large, multinational field trial. Methods Samples from 1,128 M/XDR-TB suspects were examined by Line Probe Assay (LPA), Pyrosequencing (PSQ), and Microscopic Observation of Drug Susceptibility (MODS) and compared to the BACTEC MGIT960 reference standard to detect M/XDR-TB directly from patient sputum samples collected at TB clinics in India, Moldova, and South Africa. Results Specificity for all three assays was excellent: 97–100% for isoniazid (INH), rifampin (RIF), moxifloxacin (MOX) and ofloxacin (OFX) and 99–100% for amikacin (AMK), capreomycin (CAP) and kanamycin (KAN) resistance. Sensitivities were lower, but still very good: 94–100% for INH, RIF, MOX and OFX, and 84–90% for AMK and CAP, but only 48–62% for KAN. In terms of agreement, statistically significant differences were only found for detection of RIF (MODS outperformed PSQ) and KAN (MODS outperformed LPA and PSQ) resistance. Mean time-to-result was 1.1 days for LPA and PSQ, 14.3 days for MODS, and 24.7 days for MGIT. Conclusions All three rapid assays evaluated provide clinicians with timely detection of resistance to the drugs tested; with molecular results available one day following laboratory receipt of samples. In particular, the very high specificity seen for detection of drug resistance means that clinicians can use the results of these rapid tests to avoid the use of toxic drugs to which the infecting organism is resistant and develop treatment regiments that have a higher likelihood of yielding a successful outcome.
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Affiliation(s)
- Antonino Catanzaro
- University of California San Diego, La Jolla, California, United States of America
- * E-mail:
| | - Timothy C. Rodwell
- University of California San Diego, La Jolla, California, United States of America
| | | | - Richard S. Garfein
- University of California San Diego, La Jolla, California, United States of America
| | - Roberta L. Jackson
- University of California San Diego, La Jolla, California, United States of America
| | - Marva Seifert
- University of California San Diego, La Jolla, California, United States of America
| | - Sophia B. Georghiou
- University of California San Diego, La Jolla, California, United States of America
| | | | - Erik Groessl
- University of California San Diego, La Jolla, California, United States of America
| | - Naomi Hillery
- University of California San Diego, La Jolla, California, United States of America
| | | | | | | | - Grace Shou-Yean Lin
- Microbial Diseases Laboratory, California Department of Public Health, Richmond, California, United States of America
| | - Faramarz Valafar
- San Diego State University, San Diego, California, United States of America
| | - Edward Desmond
- Microbial Diseases Laboratory, California Department of Public Health, Richmond, California, United States of America
| | - Kathleen Eisenach
- University of Arkansas, Little Rock, Arkansas, United States of America
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Georghiou SB, Magana M, Garfein RS, Catanzaro DG, Catanzaro A, Rodwell TC. Evaluation of genetic mutations associated with Mycobacterium tuberculosis resistance to amikacin, kanamycin and capreomycin: a systematic review. PLoS One 2012; 7:e33275. [PMID: 22479378 PMCID: PMC3315572 DOI: 10.1371/journal.pone.0033275] [Citation(s) in RCA: 178] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2011] [Accepted: 02/12/2012] [Indexed: 11/23/2022] Open
Abstract
Background Rapid molecular diagnostics for detecting multidrug-resistant and extensively drug-resistant tuberculosis (M/XDR-TB) primarily identify mutations in Mycobacterium tuberculosis (Mtb) genes associated with drug resistance. Their accuracy, however, is dependent largely on the strength of the association between a specific mutation and the phenotypic resistance of the isolate with that mutation, which is not always 100%. While this relationship is well established and reliable for first-line anti-TB drugs, rifampin and isoniazid, it is less well-studied and understood for second-line, injectable drugs, amikacin (AMK), kanamycin (KAN) and capreomycin (CAP). Methodology/Principal Findings We conducted a systematic review of all published studies evaluating Mtb mutations associated with resistance to AMK, KAN, CAP in order to characterize the diversity and frequency of mutations as well as describe the strength of the association between specific mutations and phenotypic resistance in global populations. Our objective was to determine the potential utility and reliability of these mutations as diagnostic markers for detecting AMK, KAN and CAP resistance. Mutation data was reviewed for 1,585 unique clinical isolates from four continents and over 18 countries. Mutations in the rrs, tlyA, eis promoter and gidB genes were associated with AMK, KAN and/or CAP resistance. Conclusions/Significance The rrs A1401G mutation was present in the majority of AMK, KAN and CAP resistant Mtb strains reviewed, but was also found in 7% of CAP susceptible strains. The 1401 mutation alone, however, was not found with sufficient frequency to detect more than 70–80% of global Mtb strains resistant to AMK and CAP, and 60% of strains resistant to KAN. Additional mutations in the rrs, eis promoter, tlyA and gidB genes appear to be associated with resistance and could improve sensitivity and specificity of future diagnostics.
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Affiliation(s)
- Sophia B. Georghiou
- Department of Molecular Biology, The Scripps Research Institute, La Jolla, California, United States of America
| | - Marisa Magana
- University of California San Diego Medical Center, San Diego, California, United States of America
| | - Richard S. Garfein
- Division of Global Public Health, University of California San Diego School of Medicine, La Jolla, California, United States of America
| | - Donald G. Catanzaro
- Department of Family and Preventive Medicine, University of California San Diego Health Services Research Center, La Jolla, California, United States of America
| | - Antonino Catanzaro
- University of California San Diego Medical Center, San Diego, California, United States of America
| | - Timothy C. Rodwell
- Division of Global Public Health, University of California San Diego School of Medicine, La Jolla, California, United States of America
- * E-mail:
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