1
|
Nandlal L, Perumal R, Naidoo K. Rapid Molecular Assays for the Diagnosis of Drug-Resistant Tuberculosis. Infect Drug Resist 2022; 15:4971-4984. [PMID: 36060232 PMCID: PMC9438776 DOI: 10.2147/idr.s381643] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Accepted: 08/20/2022] [Indexed: 11/23/2022] Open
Affiliation(s)
- Louansha Nandlal
- Centre for the AIDS Programme of Research in South Africa (CAPRISA), South African Medical Research Council (SAMRC)-CAPRISA-TB-HIV Pathogenesis and Treatment Research Unit, University of KwaZulu-Natal Nelson R Mandela School of Medicine, Durban, South Africa
| | - Rubeshan Perumal
- Centre for the AIDS Programme of Research in South Africa (CAPRISA), South African Medical Research Council (SAMRC)-CAPRISA-TB-HIV Pathogenesis and Treatment Research Unit, University of KwaZulu-Natal Nelson R Mandela School of Medicine, Durban, South Africa
- Correspondence: Rubeshan Perumal, Centre for the AIDS Programme of Research in South Africa (CAPRISA), South African Medical Research Council (SAMRC)-CAPRISA-TB-HIV Pathogenesis and Treatment Research Unit, University of KwaZulu-Natal Nelson R Mandela School of Medicine, Durban, South Africa, Email
| | - Kogieleum Naidoo
- Centre for the AIDS Programme of Research in South Africa (CAPRISA), South African Medical Research Council (SAMRC)-CAPRISA-TB-HIV Pathogenesis and Treatment Research Unit, University of KwaZulu-Natal Nelson R Mandela School of Medicine, Durban, South Africa
| |
Collapse
|
2
|
Systematic Evaluation of Line Probe Assays for the diagnosis of Tuberculosis and Drug-resistant Tuberculosis. Clin Chim Acta 2022; 533:183-218. [DOI: 10.1016/j.cca.2022.06.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 05/22/2022] [Accepted: 06/17/2022] [Indexed: 11/19/2022]
|
3
|
Karunaratne RE, Wijenayaka LA, Wijesundera SS, De Silva KMN, Adikaram CP, Perera J. Use of nanotechnology for infectious disease diagnostics: application in drug resistant tuberculosis. BMC Infect Dis 2019; 19:618. [PMID: 31299893 PMCID: PMC6626415 DOI: 10.1186/s12879-019-4259-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Accepted: 07/04/2019] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The increased transmission of multidrug-resistant (MDR) tuberculosis (TB) poses a challenge to tuberculosis prevention and control in Sri Lanka. Isoniazid (INH) is a key element of the first line anti tuberculosis treatment regimen. Resistance to INH may lead to development of MDR TB. Therefore, early detection of INH resistance is important to curb spread of resistance. Due to the limited availability of rapid molecular methods for detection of drug resistance in Sri Lanka, this study was aimed at developing a simple and rapid gold nanoparticle (AuNP) based lateral flow strip for the simultaneous detection of the most common INH resistance mutation (katG S315 T, 78.6%) and Mycobacterium tuberculosis (MTb). METHODS Lateral flow strip was designed on an inert plastic backing layer containing a sample pad, nitrocellulose membrane and an absorption pad. Biotin labeled 4 capture probes which separately conjugated with streptavidin were immobilized on the nitrocellulose. The test sample was prepared by multiplex PCR using primers to amplify codon 315 region of the katG gene and MTb specific IS6110 region. The two detection probes complementary to the 5' end of each amplified fragment was conjugated with gold nanoparticles (20 nm) and coupled with the above amplified PCR products were applied on the sample pad. The hybridization of the amplified target regions to the respective capture probes takes place when the sample moves towards the absorption pad. Positive hybridization is indicated by red colour lines. RESULTS The three immobilized capture probes on the strip (for the detection of TB, katG wild type and mutation) were 100 and 96.6% specific and 100 and 92.1% sensitive respectively. CONCLUSION The AuNP based lateral flow assay was capable of differentiating the specific mutation and the wild type along with MTb identification within 3 h.
Collapse
Affiliation(s)
- Roshanthi Eranga Karunaratne
- Department of Microbiology, Faculty of Medicine, University of Colombo, box 271, Kynsey Road, Colombo, PO, 08, Sri Lanka.
| | - Lahiru A Wijenayaka
- Sri Lanka Institute of Nanotechnology (SLINTEC), Mahenwatte, Pitipana, Homagama, Sri Lanka.,Department of Chemistry, Faculty of Natural Sciences, The Open University of Sri Lanka, Nawala, Sri Lanka
| | - Sandya Sulochana Wijesundera
- Department of Molecular Biology and Biochemistry, Faculty of Medicine, University of Colombo, Colombo, 08, Sri Lanka
| | - K M Nalin De Silva
- Sri Lanka Institute of Nanotechnology (SLINTEC), Mahenwatte, Pitipana, Homagama, Sri Lanka.,Department of Chemistry, University of Colombo, Colombo, 03, Sri Lanka
| | - Chamila Priyangani Adikaram
- Central Public Health Laboratories, National Tuberculosis Reference Laboratory, Ministry of Health, Muscat, Sultanate of Oman
| | - Jennifer Perera
- Department of Microbiology, Faculty of Medicine, University of Colombo, box 271, Kynsey Road, Colombo, PO, 08, Sri Lanka
| |
Collapse
|
4
|
Chiappini E, Lo Vecchio A, Garazzino S, Marseglia GL, Bernardi F, Castagnola E, Tomà P, Cirillo D, Russo C, Gabiano C, Ciofi D, Losurdo G, Bocchino M, Tortoli E, Tadolini M, Villani A, Guarino A, Esposito S. Recommendations for the diagnosis of pediatric tuberculosis. Eur J Clin Microbiol Infect Dis 2016; 35:1-18. [PMID: 26476550 DOI: 10.1007/s10096-015-2507-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2015] [Accepted: 10/07/2015] [Indexed: 01/10/2023]
Abstract
Tuberculosis (TB) is still the world's second most frequent cause of death due to infectious diseases after HIV infection, and this has aroused greater interest in identifying and managing exposed subjects, whether they are simply infected or have developed one of the clinical variants of the disease. Unfortunately, not even the latest laboratory techniques are always successful in identifying affected children because they are more likely to have negative cultures and tuberculin skin test results, equivocal chest X-ray findings, and atypical clinical manifestations than adults. Furthermore, they are at greater risk of progressing from infection to active disease, particularly if they are very young. Consequently, pediatricians have to use different diagnostic strategies that specifically address the needs of children. This document describes the recommendations of a group of scientific societies concerning the signs and symptoms suggesting pediatric TB, and the diagnostic approach towards children with suspected disease.
Collapse
|
5
|
Miller S, Karaoz U, Brodie E, Dunbar S. Solid and Suspension Microarrays for Microbial Diagnostics. METHODS IN MICROBIOLOGY 2015; 42:395-431. [PMID: 38620236 PMCID: PMC7172482 DOI: 10.1016/bs.mim.2015.04.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Advancements in molecular technologies have provided new platforms that are being increasingly adopted for use in the clinical microbiology laboratory. Among these, microarray methods are particularly well suited for diagnostics as they allow multiplexing, or the ability to test for multiple targets simultaneously from the same specimen. Microarray technologies commonly used for the detection and identification of microbial targets include solid-state microarrays, electronic microarrays and bead suspension microarrays. Microarray methods have been applied to microbial detection, genotyping and antimicrobial resistance gene detection. Microarrays can offer a panel approach to diagnose specific patient presentations, such as respiratory or gastrointestinal infections, and can discriminate isolates by genotype for tracking epidemiology and outbreak investigations. And, as more information has become available on specific genes and pathways involved in antimicrobial resistance, we are beginning to be able to predict susceptibility patterns based on sequence detection for particular organisms. With further advances in automated microarray processing methods and genotype-phenotype prediction algorithms, these tests will become even more useful as an adjunct or replacement for conventional antimicrobial susceptibility testing, allowing for more rapid selection of targeted therapy for infectious diseases.
Collapse
Affiliation(s)
- Steve Miller
- Clinical Microbiology Laboratory, University of California, San Francisco, California, USA
| | - Ulas Karaoz
- Earth Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Eoin Brodie
- Earth Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | | |
Collapse
|
6
|
Quinlan P, Phelan E, Doyle M. Matrix-assisted laser desorption/ionisation time-of-flight (MALDI-TOF) mass spectrometry (MS) for the identification of mycobacteria from MBBacT ALERT 3D liquid cultures and Lowenstein–Jensen (LJ) solid cultures. Clin Mol Pathol 2015; 68:229-35. [DOI: 10.1136/jclinpath-2014-202374] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
7
|
Palomino JC, Vandamme P, Martin A. Classical and new assays for detecting drug resistance in tuberculosis. Biomark Med 2014; 8:1105-14. [DOI: 10.2217/bmm.14.73] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Tuberculosis is a public health concern worldwide. Particularly worrying is the emergence of severe forms of drug resistance, such as extensively drug resistant and totally drug resistant tuberculosis, with few treatment options for the afflicted patients. To avoid further spread of drug resistance, its early detection is extremely important. Conventional phenotypic procedures to detect drug resistance depended on the in vitro slow growth of the bacteria. More recent molecular approaches such as reverse-hybridization assays and real-time PCR tests have been introduced. Newer options proposed include, faster culture-based methods and whole-genome sequencing and nanotechnology. Not yet available is a real point-of-care test, applied directly in clinical samples and reliable enough for guiding a treatment option.
Collapse
Affiliation(s)
- Juan Carlos Palomino
- Laboratory of Microbiology, Department of Biochemistry & Microbiology, Ghent University, KL Ledeganckstraat 35, 9000 Gent, Belgium
| | - Peter Vandamme
- Laboratory of Microbiology, Department of Biochemistry & Microbiology, Ghent University, KL Ledeganckstraat 35, 9000 Gent, Belgium
| | - Anandi Martin
- Laboratory of Microbiology, Department of Biochemistry & Microbiology, Ghent University, KL Ledeganckstraat 35, 9000 Gent, Belgium
| |
Collapse
|
8
|
Viveiros M, Martins M, Couto I, Rodrigues L, Machado D, Portugal I, Amaral L. Molecular tools for rapid identification and novel effective therapy against MDRTB/XDRTB infections. Expert Rev Anti Infect Ther 2014; 8:465-80. [DOI: 10.1586/eri.10.20] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
9
|
Chang KC, Yew WW, Zhang Y. A systematic review of rapid drug susceptibility tests for multidrug-resistant tuberculosis using rifampin resistance as a surrogate. ACTA ACUST UNITED AC 2013; 3:99-122. [PMID: 23485158 DOI: 10.1517/17530050802665694] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND The emergence of multidrug-resistant tuberculosis (MDR-TB) has prompted the development of rapid drug susceptibility assays with a focus on rifampin in recent years. Systematic reviews with evaluation of predictive values for different assays are scarce. METHOD MEDLINE was searched on 6 September 2008 for English articles that contain concurrent original data for generating summary measures of sensitivity, specificity and likelihood ratios of rapid rifampin susceptibility assays. RESULTS/CONCLUSIONS Significant heterogeneity was found in likelihood ratios across studies of all assays except nitrate reductase assay and colorimetric assays. Although rapid assays are fairly reliable for ruling out MDR-TB, careful consideration of clinical risk factors is required before using these assays to rule in MDR-TB under different epidemiological settings.
Collapse
Affiliation(s)
- Kwok-Chiu Chang
- Senior Medical and Health Officer Tuberculosis and Chest Service, Wanchai Chest Clinic, Department of Health, 1st Floor, Wanchai Polyclinic, 99, Kennedy Road, Wanchai, Hong Kong, China +852 25911147 ; +852 28346627 ;
| | | | | |
Collapse
|
10
|
Heysell SK, Houpt ER. The future of molecular diagnostics for drug-resistant tuberculosis. Expert Rev Mol Diagn 2012; 12:395-405. [PMID: 22616704 DOI: 10.1586/erm.12.25] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The last decade has seen significant advances in tuberculosis diagnostics and drug susceptibility testing (DST). During the same time period the prevalence of drug-resistant tuberculosis has increased and therefore it has become critical to understand DST for medications used to treat multidrug-resistant and extensively drug-resistant tuberculosis. This review describes recent molecular diagnostic advances for DST. Recommendations are provided for clinicians interpreting molecular DST and we describe potential opportunities for the field.
Collapse
Affiliation(s)
- Scott K Heysell
- Division of Infectious Diseases & International Health, University of Virginia, PO Box 801337, Charlottesville, VA 22908-1337, USA
| | | |
Collapse
|
11
|
Raveendran R, Wattal C, Oberoi JK, Goel N, Datta S, Prasad KJ. Utility of GenoType MTBDRplus assay in rapid diagnosis of multidrug resistant tuberculosis at a tertiary care centre in India. Indian J Med Microbiol 2012; 30:58-63. [PMID: 22361762 DOI: 10.4103/0255-0857.93034] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
PURPOSE Molecular methods which allow rapid detection of tuberculosis as well as drug resistance directly from clinical samples have become the most popular diagnostic methodology with the emergence of multidrug resistant tuberculosis. The aim of the present study was to evaluate the performance of a line probe assay, GenoType MTBDRplus for the rapid detection of Mycobacterium tuberculosis and mutations causing rifampicin and INH resistance directly in smear positive pulmonary specimens and also in M. tuberculosis isolates grown from various clinical specimens. MATERIALS AND METHODS The MTBDRplus assay was done directly on 37 smear positive pulmonary specimens and also on 69 M. tuberculosis isolates obtained by rapid automated culture using Bact/Alert 3D. The results were compared with phenotypic drug susceptibility testing (1% proportion method) using Bact/Alert 3D. RESULTS The sensitivity and specificity for detection of resistance to rifampicin was 100% and 97.3%, and to INH was 91.9% and 98.4%, respectively, in comparison with the phenotypic drug susceptibility testing. CONCLUSION MTBDRplus assay had good sensitivity and specificity with turn around time of less than 48 hours. It may be a useful tool for rapid detection of multidrug resistant tuberculosis at a tertiary care centre.
Collapse
Affiliation(s)
- R Raveendran
- Department of Clinical Microbiology and Immunology, Sir Ganga Ram Hospital, New Delhi - 110 060, India
| | | | | | | | | | | |
Collapse
|
12
|
Palomino JC. Current developments and future perspectives for TB diagnostics. Future Microbiol 2012; 7:59-71. [PMID: 22191447 DOI: 10.2217/fmb.11.133] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
TB persists as a global epidemic with high morbidity and mortality, especially in low-income countries. It is the only infectious disease ever declared as a global emergency by the WHO. The HIV pandemic and the emergence of drug resistance represent two additional obstacles to better control of the disease. Important progress has been made in the last decade in TB diagnostics. Major needs still exist, such as the availability of a real point-of-care test, a better diagnosis of TB in immune-compromised populations and in children, and the possibility to predict progression to disease in latently infected people. This review will summarize the current developments in TB diagnostics and the perspectives for future developments in the field.
Collapse
Affiliation(s)
- Juan Carlos Palomino
- Mycobacteriology Unit, Institute of Tropical Medicine, Nationalestraat 155, 2000, Antwerp, Belgium.
| |
Collapse
|
13
|
Sankar S, Ramamurthy M, Nandagopal B, Sridharan G. An appraisal of PCR-based technology in the detection of Mycobacterium tuberculosis. Mol Diagn Ther 2011; 15:1-11. [PMID: 21250760 DOI: 10.1007/bf03257188] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Tuberculosis is an under-recognized yet catastrophic health problem, particularly in developing countries. The HIV pandemic has served to increase the number of susceptible individuals, and multidrug-resistance and poor socioeconomic conditions also augment the prevalence and the consequences of the disease. To control the disease and its spread, it is vital that tuberculosis diagnostics are accurate and rapid. Whereas microscopy and culture have several limitations (low sensitivity is a problem for the former, while the latter has a delayed turnaround time), PCR-based techniques targeting regions of the Mycobacterium tuberculosis genome such as IS6110 have proved to be useful. The purpose of this review is to assess the use of PCR-RFLP, nested PCR and real-time PCR protocols and the choice of target regions for the detection of M. tuberculosis. Real-time PCR for the detection of M. tuberculosis target genes in clinical specimens has contributed to improving diagnosis and epidemiologic surveillance in the past decade. However, targeting one genome sequence such as IS6110 may not by itself be sufficiently sensitive to reach 100% diagnosis, especially in the case of pulmonary tuberculosis. Additional testing for target genome sequences such as hsp65 seems encouraging. An interesting approach would be a multiplex real-time PCR targeting both IS6110 and hsp65 to achieve comprehensive and specific molecular diagnosis. This technology needs development and adequate field testing before it becomes the acceptable gold standard for diagnosis.
Collapse
Affiliation(s)
- Sathish Sankar
- Division of Biomedical Research, Sri Narayani Hospital and Research Centre, Thirumalaikodi, Sripuram, Vellore, Tamil Nadu, India.
| | | | | | | |
Collapse
|
14
|
|
15
|
Multidrug-resistant and extensively drug-resistant tuberculosis: consequences for the global HIV community. Curr Opin Infect Dis 2009; 22:11-7. [PMID: 19532076 DOI: 10.1097/qco.0b013e3283210020] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
PURPOSE OF REVIEW Physicians, researchers and policy makers must understand the myriad consequences of multidrug and extensively drug-resistant tuberculosis (TB) within the HIV community in order to guide clinical care, research and resource allocation. RECENT FINDINGS Extensively drug-resistant TB can no longer be considered as occurring in isolated outbreaks as it has been reported in 45 countries from all regions of the world. HIV has been associated as an independent risk factor for infection with drug-resistant TB. HIV patients appear more likely to suffer from primary, transmitted resistance as opposed to developing acquired resistance during the course of treatment for TB. New rapid diagnostics offer promise of providing clinically useful first-line drug susceptibility information but require validation in HIV patients and smear negative individuals. Demonstration projects of community-based treatment of drug-resistant TB and integration of TB and HIV care provide opportunities to decentralize management of drug-resistant TB. SUMMARY Multidrug-resistant and extensively drug-resistant TB disproportionately affect HIV patients and result in increased morbidity and mortality. In this study, we address these challenging issues and offer some short-term and longer term strategies for their alleviation.
Collapse
|
16
|
Tuberculosis in the developing world: recent advances in diagnosis with special consideration of extensively drug-resistant tuberculosis. Curr Opin Infect Dis 2008; 21:454-61. [PMID: 18725793 DOI: 10.1097/qco.0b013e32830ce783] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
PURPOSE OF REVIEW Globally tuberculosis is mainly diagnosed by sputum smear microscopy, which fails to detect half of all cases and fails to identify drug resistance. Inadequate global tuberculosis control through the directly observed therapy short course strategy alone and the growing threat of multidrug-resistant and extensively drug-resistant tuberculosis has driven recent development of new commercial and noncommercial tests, which are most desperately needed in resource-limited, high-burden settings. This review outlines the range of options currently available, highlighting particularly those recent developments with greatest potential for addressing the growing multidrug-resistant and extensively drug-resistant disaster as it affects those communities least technically and financially capable of controlling it. RECENT FINDINGS Simplification of molecular-diagnostic techniques, rapid-liquid culture and the use of colorimetric indicators have improved the sensitivity, speed and reliability of tuberculosis and multidrug-resistant tuberculosis detection, while decreasing cost and bringing diagnosis closer towards (though still some way from) the point-of-care. SUMMARY Global tuberculosis control in 2008 demands the use of new tools for more sensitive and rapid detection of active disease and of drug resistance. Improved technologies are available for reference laboratories but for settings where resources and technical capacity are limited there is little ready for field implementation. The pipeline is promising, but in the interim wider use of liquid culture and manual or colorimetric drug susceptibility testing should be promoted.
Collapse
|
17
|
GenoType MTBDRplus assay for molecular detection of rifampin and isoniazid resistance in Mycobacterium tuberculosis strains and clinical samples. J Clin Microbiol 2008; 46:3660-7. [PMID: 18784319 DOI: 10.1128/jcm.00618-08] [Citation(s) in RCA: 94] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The purpose of this study was to evaluate the GenoType MTBDRplus assay (Hain Lifescience GmbH, Nehren, Germany) for its ability to detect resistance to rifampin (RIF) and isoniazid (INH) in Mycobacterium tuberculosis clinical strains and directly in clinical samples. A total of 62 clinical strains characterized with the Bactec 460TB system were included. For the INH-resistant strains, the MIC was measured and sequencing was performed. Sixty-five clinical samples from 28 patients (39 smear-positive samples and 26 smear-negative samples) were also tested directly. The corresponding isolates of the clinical specimens were studied with the Bactec 460TB system. The overall rates of concordance of the MTBDRplus assay and the Bactec 460TB system for the detection of RIF and INH susceptibility in clinical strains were 98.3% (61/62) and 79% (49/62), respectively. The rate of concordance between the Bactec 460TB system and the MTBDRplus test for the detection of INH resistance in the group of 27 strains with low-level resistance was 62.9% (17/27), and that for the detection of INH resistance in the group of 21 strains with high-level resistance was 85.71% (18/21). Valid test results were obtained for 78.45% (51/65) of the clinical samples tested. The rates of concordance between both assays for the detection of drug resistance in these samples were 98% (50/51) for RIF and 96.2% (49/51) for INH. Taking into account only one sample per patient, the overall rate of concordance between both tests was 92.85% (26/28). The GenoType MTBDRplus assay is easy to perform and is a useful tool for the management of tuberculosis, as it allows the detection of resistance to RIF and INH in M. tuberculosis strains and also in clinical samples.
Collapse
|
18
|
Neonakis IK, Gitti Z, Krambovitis E, Spandidos DA. Molecular diagnostic tools in mycobacteriology. J Microbiol Methods 2008; 75:1-11. [DOI: 10.1016/j.mimet.2008.05.023] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2008] [Revised: 05/14/2008] [Accepted: 05/23/2008] [Indexed: 10/22/2022]
|