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Jin W, Wang J, Yang X. Analysis of three cases with false positive PCR results of non tuberculosis mycobacterium. Respir Med Case Rep 2023; 47:101973. [PMID: 38260180 PMCID: PMC10801299 DOI: 10.1016/j.rmcr.2023.101973] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Accepted: 12/22/2023] [Indexed: 01/24/2024] Open
Abstract
Background Real-time fluorescent quantitative PCR (RT-PCR) can effectively distinguish between Mycobacterium tuberculosis (MTB) and Non-tuberculosis mycobacterium (NTM), but when there are overlapping sequences between other pathogens (such as Nocardia otidiscaviarum, Mycobacterium parantracellulare, Mycolicibacterium fluoranthenivorans) and NTM, abnormal amplification curves may appear. Case presentation The clinical manifestations of the three patients were fever and respiratory symptoms. Chest CT showed "multiple lung infections". The acid-fast bacilli were negative by microscopic examination. The results of RT-PCR detection of Mycobacterium tuberculosis DNA showed that they are all NTM, while the results of DNA microarray method showed that there were no non-Mycobacterium tuberculosis. Identified by MALDI-TOF mass spectrometry, they are Nocardia otidiscaviarum, Mycobacterium parantracellale, Mycolicibacterium fluoranthenivorans. We found that the sequences of the above three bacteria can be combined with the primers and probes used for NTM PCR detection, resulting in false positive. Conclusions In the RT-PCR detection of mycobacteria, if there's abnormal amplification, and the mycobacterial species cannot be identified, the amplified products sequencing or MALDI- TOF mass spectrometry identification will help avoid the omission of rare pathogens.
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Affiliation(s)
| | | | - Xin Yang
- The clinical Laboratory, Yantai Yuhuangding Hospital, 20 Yuhuangding East Road, Yantai 264000, Shandong, China
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Chen X, Huang J, Xiao Z, Yang X, Chen Y, Zheng W, Chen W, Chen H, Li S. Highly specific and sensitive detection of the Mycobacterium tuberculosis complex using multiplex loop-mediated isothermal amplification combined with a nanoparticle-based lateral flow biosensor. Braz J Microbiol 2021; 52:1315-1325. [PMID: 34176103 DOI: 10.1007/s42770-021-00520-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2021] [Accepted: 04/27/2021] [Indexed: 10/21/2022] Open
Abstract
Tuberculosis (TB) is the deadliest infectious caused by Mycobacterium tuberculosis complex (MTBC). Because most TB cases occur within low-income populations, developing a specific, sensitive, cost-saving, and rapid point-of-care test for the early diagnosis of TB is important for achieving the WHO's End Tuberculosis Strategy. In the current study, a novel nucleic acid detection strategy that includes multiplex loop-mediated isothermal amplification combined with a nanoparticle-based lateral flow biosensor (mLAMP-LFB) was used to detect MTBC. The two sets of LAMP primers specific to the IS6110 and gyrB genes of MTBC were successfully designed and validated for the detection of MTBC. The preferred reaction conditions for this assay were confirmed to be 65 °C for 40 min, and the amplification products could be visually identified through LFB within 2 min. The full assay process, including genomic DNA template extraction, LAMP reaction, and product detection, could be completed in 80 min. The limit detection of the assay was 100 fg of DNA in pure culture. The specificity of the assay was 100%, and it had no cross-reactions to other strains. Thus, the m-LAMP-LFB technology established in the present study was an objective, rapid, simple, and sensitive assay for MTBC identification, which could be applied in a clinical setting, especially in resource-constrained regions of the world.
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Affiliation(s)
- Xu Chen
- Laboratory of Infectious Disease of Experimental Center, Guizhou Provincial Center for Disease Control and Prevention, 73 Bageyan Road, Guiyang, 550004, Guizhou, People's Republic of China.,The Second Affiliated Hospital, Guizhou University of Traditional Chinese Medicine, Guiyang, Guizhou, 550003, People's Republic of China
| | - Junfei Huang
- Laboratory of Infectious Disease of Experimental Center, Guizhou Provincial Center for Disease Control and Prevention, 73 Bageyan Road, Guiyang, 550004, Guizhou, People's Republic of China
| | - Ziyu Xiao
- The Second Affiliated Hospital, Guizhou University of Traditional Chinese Medicine, Guiyang, Guizhou, 550003, People's Republic of China.,Public Health School, Guizhou Medical University, Guiyang, People's Republic of China
| | - Xingui Yang
- Laboratory of Infectious Disease of Experimental Center, Guizhou Provincial Center for Disease Control and Prevention, 73 Bageyan Road, Guiyang, 550004, Guizhou, People's Republic of China.,Public Health School, Guizhou Medical University, Guiyang, People's Republic of China
| | - Yijiang Chen
- Laboratory of Infectious Disease of Experimental Center, Guizhou Provincial Center for Disease Control and Prevention, 73 Bageyan Road, Guiyang, 550004, Guizhou, People's Republic of China
| | - Wenlin Zheng
- Laboratory of Infectious Disease of Experimental Center, Guizhou Provincial Center for Disease Control and Prevention, 73 Bageyan Road, Guiyang, 550004, Guizhou, People's Republic of China
| | - Wei Chen
- Laboratory of Infectious Disease of Experimental Center, Guizhou Provincial Center for Disease Control and Prevention, 73 Bageyan Road, Guiyang, 550004, Guizhou, People's Republic of China
| | - Huijuan Chen
- Laboratory of Infectious Disease of Experimental Center, Guizhou Provincial Center for Disease Control and Prevention, 73 Bageyan Road, Guiyang, 550004, Guizhou, People's Republic of China
| | - Shijun Li
- Laboratory of Infectious Disease of Experimental Center, Guizhou Provincial Center for Disease Control and Prevention, 73 Bageyan Road, Guiyang, 550004, Guizhou, People's Republic of China. .,Public Health School, Guizhou Medical University, Guiyang, People's Republic of China.
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Nurwidya F, Handayani D, Burhan E, Yunus F. Molecular Diagnosis of Tuberculosis. Chonnam Med J 2018; 54:1-9. [PMID: 29399559 PMCID: PMC5794472 DOI: 10.4068/cmj.2018.54.1.1] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Revised: 12/19/2017] [Accepted: 12/20/2017] [Indexed: 12/13/2022] Open
Abstract
Tuberculosis (TB) is one of the leading causes of adult death in the Asia-Pacific Region, including Indonesia. As an infectious disease caused by Mycobacterium tuberculosis (MTB), TB remains a major public health issue especially in developing nations due to the lack of adequate diagnostic testing facilities. Diagnosis of TB has entered an era of molecular detection that provides faster and more cost-effective methods to diagnose and confirm drug resistance in TB cases, meanwhile, diagnosis by conventional culture systems requires several weeks. New advances in the molecular detection of TB, including the faster and simpler nucleic acid amplification test (NAAT) and whole-genome sequencing (WGS), have resulted in a shorter time for diagnosis and, therefore, faster TB treatments. In this review, we explored the current findings on molecular diagnosis of TB and drug-resistant TB to see how this advancement could be integrated into public health systems in order to control TB.
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Affiliation(s)
- Fariz Nurwidya
- Department of Pulmonology and Respiratory Medicine, Universitas Indonesia Faculty of Medicine, Persahabatan Hospital, Jakarta, Indonesia
| | - Diah Handayani
- Department of Pulmonology and Respiratory Medicine, Universitas Indonesia Faculty of Medicine, Persahabatan Hospital, Jakarta, Indonesia
| | - Erlina Burhan
- Department of Pulmonology and Respiratory Medicine, Universitas Indonesia Faculty of Medicine, Persahabatan Hospital, Jakarta, Indonesia
| | - Faisal Yunus
- Department of Pulmonology and Respiratory Medicine, Universitas Indonesia Faculty of Medicine, Persahabatan Hospital, Jakarta, Indonesia
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Wang HY, Uh Y, Kim S, Shim TS, Lee H. Evaluation of the Quantamatrix Multiplexed Assay Platform system for simultaneous detection of Mycobacterium tuberculosis and the rifampicin resistance gene using cultured mycobacteria. Int J Infect Dis 2017. [PMID: 28627431 DOI: 10.1016/j.ijid.2017.06.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND The differentiation of Mycobacterium tuberculosis complex (MTBC) from non-tuberculous mycobacteria (NTM) is of primary importance for infection control and the selection of anti-tuberculosis drugs. Up to date data on rifampicin (RIF)-resistant tuberculosis (TB) is essential for the early management of multidrug-resistant TB. The aim of this study was to evaluate the usefulness of a newly developed multiplexed, bead-based bioassay (Quantamatrix Multiplexed Assay Platform, QMAP) for the rapid differentiation of 23 Mycobacterium species including MTBC and RIF-resistant strains. METHODS A total of 314 clinical Mycobacterium isolates cultured from respiratory specimens were used in this study. RESULTS The sensitivity and specificity of the QMAP system for Mycobacterium species were 100% (95% CI 99.15-100%, p<0.0001) and 97.8% (95% CI 91.86-99.87%, p<0.0001), respectively. The results of conventional drug susceptibility testing and the QMAP Dual-ID assay were completely concordant for all clinical isolates (100%, 95% CI 98.56-100%). Out of 223 M. tuberculosis (MTB) isolates, 196 were pan-susceptible and 27 were resistant to RIF according to QMAP results. All of the mutations in the RIF resistance-determining region detected by the QMAP system were confirmed by rpoB sequence analysis and a REBA MTB-Rifa reverse blot hybridization assay. The majority of the mutations (n=26, 96.3%), including those missing wild-type probe signals, were located in three codons (529-534, 524-529, and 514-520), and 17 (65.4%) of these mutations were detected by three mutation probes (531TTG, 526TAC, and 516GTC). CONCLUSIONS The entire QMAP system assay takes about 3h to complete, while results from the culture-based conventional method can take up to 48-72h. Although improvements to the QMAP system are needed for direct respiratory specimens, it may be useful for rapid screening, not only to identify and accurately discriminate MTBC from NTM, but also to identify RIF-resistant MTB strains in positive culture samples.
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Affiliation(s)
- Hye-Young Wang
- Optipharm, Inc., Wonju Eco Environmental Technology Center, Wonju, Gangwon, 26493, Republic of Korea
| | - Young Uh
- Department of Laboratory Medicine, Yonsei University Wonju College of Medicine, 20 Ilsan-ro, Wonju, Gangwon, 26426, Republic of Korea.
| | - Seoyong Kim
- Department of Biomedical Laboratory Science, College of Health Sciences, Yonsei University, Wonju, Gangwon, 26493, Republic of Korea
| | - Tae-Sun Shim
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of Ulsan College of Medicine, Asan Medical Center, Seoul, 05535, Republic of Korea
| | - Hyeyoung Lee
- Department of Biomedical Laboratory Science, College of Health Sciences, Yonsei University, Wonju, Gangwon, 26493, Republic of Korea.
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Yao Y, Liao Y, Han M, Li SL, Luo J, Zhang B. Two kinds of common prenatal screening tests for Down's syndrome: a systematic review and meta-analysis. Sci Rep 2016; 6:18866. [PMID: 26732706 PMCID: PMC4702166 DOI: 10.1038/srep18866] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2015] [Accepted: 11/11/2015] [Indexed: 12/18/2022] Open
Abstract
As the chromosomal examination of foetal cells for the prenatal diagnosis of Down's syndrome (DS) carries a risk of inducing miscarriage, serum screening tests are commonly used before invasive procedures. In this study, a total of 374 records from PubMed, EMBASE, and the ISI Science Citation Index databases were reviewed. As a result of duplication, insufficient data, and inappropriate article types, 18 independent articles containing 183,998 samples were used in the final systematic review and meta-analysis of the diagnostic performance of the serum triple screening test (STS) and the integrated screening test (INS). Data extracted from the selected studies were statistically analysed, and the presence of heterogeneity and publication bias was assessed using specific software. The overall sensitivity, specificity, positive likelihood ratio, negative likelihood ratio, diagnostic odds ratio, and the area under the curve for the STS were 0.77 (95% confidence interval = 0.73-0.81), 0.94 (0.94-0.94), 9.78 (6.87-13.93), 0.26 (0.22-0.31), 44.72 (30.77-65.01), and 0.9064, respectively. For the INS, these values were 0.93 (0.90-0.95), 0.93 (0.93-0.93), 22.38 (12.47-40.14), 0.08 (0.05-0.11), 289.81 (169.08-496.76), and 0.9781, respectively. These results indicate that the INS exhibits better diagnostic value for DS. However, further research is needed to identify other biomarkers to improve prenatal screening tests.
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Affiliation(s)
- Yuan Yao
- Department of Laboratory Medicine, Southwest Hospital, Third Military Medical University of PLA, Chongqing 400038, PR China
- Department of Laboratory Medicine, No. 191 Clinical Department of No. 303 Hospital of PLA, Guigang 537100, Guangxi, PR China
| | - Yang Liao
- Department of Laboratory Medicine, Guangzhou General Hospital of Guangzhou Military Command of PLA, Guangzhou 510010, Guangdong, PR China
| | - Mei Han
- Department of Laboratory Medicine, Southwest Hospital, Third Military Medical University of PLA, Chongqing 400038, PR China
| | - Sheng-Lan Li
- Department of Laboratory Medicine, Southwest Hospital, Third Military Medical University of PLA, Chongqing 400038, PR China
| | - Juan Luo
- Department of Laboratory Medicine, Southwest Hospital, Third Military Medical University of PLA, Chongqing 400038, PR China
| | - Bo Zhang
- Department of Laboratory Medicine, Southwest Hospital, Third Military Medical University of PLA, Chongqing 400038, PR China
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Chaoui I, Atalhi N, Sabouni R, Akrim M, Abid M, Amzazi S, ElMzibri M. Rifoligotyping assay: an alternative method for rapid detection of rifampicin resistance in Mycobacterium tuberculosis isolates from Morocco. BIOTECHNOL BIOTEC EQ 2014; 28:1095-1102. [PMID: 26740783 PMCID: PMC4684065 DOI: 10.1080/13102818.2014.975569] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2013] [Accepted: 08/26/2014] [Indexed: 11/08/2022] Open
Abstract
One of the greatest threats to global tuberculosis (TB) control is the growing prevalence of drug resistant strains. In the past decades, considerable efforts have been made upon the development of new molecular technologies and methodologies for detection of drug resistance in Mycobacterium tuberculosis (MTB). A sensitive, specific reverse line blot assay, called rifoligotyping (RIFO), for the detection of genotypic resistance to rifampicin (RIF), was designed and evaluated. RIFO includes oligonucleotide probes specific for wild-type and mutant sequences, allowing specific and sensitive detection of both genotypes in a single assay. The RIFO was applied on 500 MTB isolates from Morocco. The results of the RIFO showed a good sensitivity (90.9%) and high specificity (100%); the positive and negative predictive values were 100% and 96.1%, respectively. This rapid, simple, economical assay provides a practical alternative for RIF genotyping, especially in low-income countries, to improve TB control and management.
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Affiliation(s)
- Imane Chaoui
- Unit of Biology and Medical Research, National Center of Energy, Sciences and Nuclear Techniques, Rabat, Morocco; Laboratory of Biochimestry and Immunology, Faculty of Sciences, Mohammed V University, Rabat, Morocco
| | - Naima Atalhi
- Unit of Biology and Medical Research, National Center of Energy, Sciences and Nuclear Techniques , Rabat , Morocco
| | - Radia Sabouni
- National Tuberculosis Reference Laboratory, National Institute of Hygiene , Rabat , Morocco
| | - Mohammed Akrim
- National Tuberculosis Reference Laboratory, National Institute of Hygiene , Rabat , Morocco
| | - Mohammed Abid
- Laboratory of Mycobacteria Genetics, Research Service, Pasteur Institute , Tanger , Morocco
| | - Saaid Amzazi
- Laboratory of Biochimestry and Immunology, Faculty of Sciences, Mohammed V University , Rabat , Morocco
| | - Mohammed ElMzibri
- Unit of Biology and Medical Research, National Center of Energy, Sciences and Nuclear Techniques , Rabat , Morocco
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Cheng S, Cui Z, Li Y, Hu Z. Diagnostic accuracy of a molecular drug susceptibility testing method for the antituberculosis drug ethambutol: a systematic review and meta-analysis. J Clin Microbiol 2014; 52:2913-24. [PMID: 24899018 PMCID: PMC4136177 DOI: 10.1128/jcm.00560-14] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2014] [Accepted: 05/26/2014] [Indexed: 11/20/2022] Open
Abstract
Ethambutol (EMB) is a first-line antituberculosis drug; however, drug resistance to EMB has been increasing. Molecular drug susceptibility testing (DST), based on the embB gene, has recently been used for rapid identification of EMB resistance. The aim of this meta-analysis was to establish the accuracy of molecular assay for detecting drug resistance to EMB. PubMed, Embase, and Web of Science were searched according to a written protocol and explicit study selection criteria. Measures of diagnostic accuracy were pooled using a random effects model. A total of 34 studies were included in the meta-analysis. The respective pooled sensitivities and specificities were 0.57 and 0.93 for PCR-DNA sequencing that targeted the embB 306 codon, 0.76 and 0.89 for PCR-DNA sequencing that targeted the embB 306, 406, and 497 codons, 0.64 and 0.70 for detecting Mycobacterium tuberculosis isolates, 0.55 and 0.78 for detecting M. tuberculosis sputum specimens using the GenoType MTBDRsl test, 0.57 and 0.87 for pyrosequencing, and 0.35 and 0.98 for PCR-restriction fragment length polymorphism. The respective pooled sensitivities and specificities were 0.55 and 0.92 when using a lower EMB concentration as the reference standard, 0.67 and 0.73 when using a higher EMB concentration as the reference standard, and 0.60 and 1.0 when using multiple reference standards. PCR-DNA sequencing using multiple sites of the embB gene as detection targets, including embB 306, 406, and 497, can be a rapid method for preliminarily screening for EMB resistance, but it does not fully replace phenotypic DST. Of the reference DST methods examined, the agreement rates were the best using MGIT 960 for molecular DST and using the proportion method on Middlebrook 7H10 media.
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Affiliation(s)
- Song Cheng
- Shanghai Key Laboratory of Tuberculosis, Shanghai Pulmonary Hospital, Medical School, Tongji University, Shanghai, China
| | - Zhenling Cui
- Shanghai Key Laboratory of Tuberculosis, Shanghai Pulmonary Hospital, Medical School, Tongji University, Shanghai, China
| | - Yuanyuan Li
- Shanghai Key Laboratory of Tuberculosis, Shanghai Pulmonary Hospital, Medical School, Tongji University, Shanghai, China School of Biology and Basic Medical Sciences, Soochow University, Suzhou, China
| | - Zhongyi Hu
- Shanghai Key Laboratory of Tuberculosis, Shanghai Pulmonary Hospital, Medical School, Tongji University, Shanghai, China
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He J, Zhu B, Yang Z, Hu B, Lin L, Zhang Q. Molecular analysis of the rpsL gene for rapid detection of streptomycin-resistant Mycobacterium tuberculosis: a meta-analysis. SCANDINAVIAN JOURNAL OF INFECTIOUS DISEASES 2014; 46:585-92. [PMID: 24934990 DOI: 10.3109/00365548.2014.918649] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND Drug-resistant Mycobacterium tuberculosis (MTB) is a major threat to tuberculosis (TB) control programs and public health. Most conventional methods of drug susceptibility testing (DST) are precise but time-consuming. Molecular analysis of the rpsL gene has been used widely in diagnosing streptomycin-resistant MTB since it is rapid and specific. The aim of the present study was to perform a meta-analysis to assess the accuracy of molecular assay of the rpsL gene for the rapid detection of streptomycin-resistant MTB. METHODS We searched PubMed, Web of Science, and EBSCO databases for studies that applied a molecular assay of the rpsL gene to detect streptomycin-resistant MTB with a conventional method as the reference. The sensitivity and specificity were pooled by a random effect model using Meta-DiSc software. A summary receiver operating characteristic curve (SROC) was applied to summarize the diagnostic accuracy. RESULTS A total of 22 studies involving 2618 specimens with 1372 streptomycin-resistant and 1246 streptomycin-susceptible specimens met our inclusion criteria. The overall sensitivity and specificity estimates were 0.64 (95% confidence interval (CI) 0.61-0.66) and 1.00 (95% CI 0.99-1.00), respectively. The area under the SROC curve was 0.9069 and the Cochrane (Q*) index was 0.8387. CONCLUSIONS This meta-analysis reveals that molecular assay of the rpsL gene is a reliable and useful method for the detection of streptomycin-resistant MTB.
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Affiliation(s)
- Jing He
- From the Faculty of Environmental Science and Engineering, Kunming University of Science and Technology
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Chen D, Wang YY, Chuai ZR, Huang JF, Wang YX, Liu K, Zhang LQ, Yang Z, Shi DC, Liu Q, Huang Q, Fu WL. High-resolution melting analysis for accurate detection of BRAF mutations: a systematic review and meta-analysis. Sci Rep 2014; 4:4168. [PMID: 24566771 PMCID: PMC3933866 DOI: 10.1038/srep04168] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2013] [Accepted: 02/03/2014] [Indexed: 12/24/2022] Open
Abstract
The high-resolution melting curve analysis (HRMA) might be a good alternative method for rapid detection of BRAF mutations. However, the accuracy of HRMA in detection of BRAF mutations has not been systematically evaluated. We performed a systematic review and meta-analysis involving 1324 samples from 14 separate studies. The overall sensitivity of HRMA was 0.99 (95% confidence interval (CI) = 0.75–0.82), and the overall specificity was very high at 0.99 (95% CI = 0.94–0.98). The values for the pooled positive likelihood ratio, negative likelihood ratio, and diagnostic odds ratio were 68.01 (95% CI = 25.33–182.64), 0.06 (95% CI = 0.03–0.11), and1263.76 (95% CI = 393.91–4064.39), respectively. The summary receiver operating characteristic curve for the same data shows an area of 1.00 and a Q* value of 0.97. The high sensitivity and specificity, simplicity, low cost, less labor or time and rapid turnaround make HRMA a good alternative method for rapid detection of BRAF mutations in the clinical practice.
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Affiliation(s)
- Dong Chen
- Department of Laboratory Medicine, Southwest Hospital, Third Military Medical University, Chongqing, PR China
| | - Yan-Yan Wang
- Research and service centre of laboratory medicine, Chengdu Military general Hospital, Chengdu, PR China
| | - Zheng-Ran Chuai
- Department of Laboratory Medicine, Southwest Hospital, Third Military Medical University, Chongqing, PR China
| | - Jun-Fu Huang
- Department of Laboratory Medicine, Southwest Hospital, Third Military Medical University, Chongqing, PR China
| | - Yun-Xia Wang
- Department of Laboratory Medicine, Southwest Hospital, Third Military Medical University, Chongqing, PR China
| | - Kai Liu
- Research Center for Nutrition and Food Safety, Institute of Military Preventive Medicine, Third Military Medical University, Chongqing, PR China
| | - Li-Qun Zhang
- Department of Laboratory Medicine, Southwest Hospital, Third Military Medical University, Chongqing, PR China
| | - Zhao Yang
- Department of Laboratory Medicine, Southwest Hospital, Third Military Medical University, Chongqing, PR China
| | - Da-Chuan Shi
- Department of Laboratory Medicine, Southwest Hospital, Third Military Medical University, Chongqing, PR China
| | - Qian Liu
- Department of Laboratory Medicine, Southwest Hospital, Third Military Medical University, Chongqing, PR China
| | - Qing Huang
- Department of Laboratory Medicine, Southwest Hospital, Third Military Medical University, Chongqing, PR China
| | - Wei-Ling Fu
- Department of Laboratory Medicine, Southwest Hospital, Third Military Medical University, Chongqing, PR China
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High-resolution melting curve analysis for rapid detection of rifampin resistance in Mycobacterium tuberculosis: a meta-analysis. J Clin Microbiol 2013; 51:3294-9. [PMID: 23885006 DOI: 10.1128/jcm.01264-13] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
A rapid, simple, accurate, and affordable method for the detection of drug-resistant tuberculosis is very critical for the selection of antimicrobial therapy and management of patient treatment. High-resolution melting curve analysis has been used for the detection of rifampin resistance in Mycobacterium tuberculosis and has shown promise. We did a systematic review and meta-analysis of published studies to evaluate the accuracy of high-resolution melting curve analysis for the detection of rifampin resistance in clinical M. tuberculosis isolates. We searched the PubMed, BIOSIS Previews, and Web of Science databases to identify studies and included them according to predetermined criteria. We used the DerSimonian-Laird random-effects model to calculate pooled measures and applied Moses' constant for linear models to fit the summary receiver operating characteristic curve. According to the selection criteria, most of the identified studies were excluded, and only seven studies were included in the final analysis. The overall sensitivity of the high-resolution melting curve analysis was 94% (95% confidence interval [CI], 92% to 96%), and the overall specificity was very high at 99% (95% CI, 98% to 100%). The values for the pooled positive likelihood ratio, negative likelihood ratio, and diagnostic odds ratio were 63.39 (95% CI, 30.21 to 133.00), 0.06 (95% CI, 0.04 to 0.09), and 892.70 (95% CI, 385.50 to 2,067.24), respectively. There was no significant heterogeneity across all included studies for the measurements we evaluated. The summary receiver operating characteristic curve for the same data shows an area of 0.99 and a Q* value of 0.97. High-resolution melting curve analysis has high sensitivity and specificity for the detection of rifampin resistance in clinical M. tuberculosis isolates. This method might be a good alternative to conventional drug susceptibility tests in clinical practice.
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Cremonesi P, Pozzi F, Ricchi M, Castiglioni B, Luini M, Chessa S. Technical note: Identification of Prototheca species from bovine milk samples by PCR-single strand conformation polymorphism. J Dairy Sci 2012; 95:6963-8. [DOI: 10.3168/jds.2012-5785] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2012] [Accepted: 07/29/2012] [Indexed: 01/14/2023]
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