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Huang WC, Lin CB, Chien ST, Wang JY, Lin CJ, Feng JY, Lee CH, Shu CC, Yu MC, Lee JJ, Chiang CY. Performance of Nucleic Acid Amplification Tests in Patients with Presumptive Pulmonary Tuberculosis in Taiwan. Infect Dis Ther 2022; 11:871-885. [PMID: 35254635 PMCID: PMC8900096 DOI: 10.1007/s40121-022-00610-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Accepted: 02/14/2022] [Indexed: 11/24/2022] Open
Abstract
INTRODUCTION Several nucleic acid amplification tests (NAATs) for detection of Mycobacterium tuberculosis (TB) complex (MTBC) are available in Taiwan; however, their performances may differ and have not been extensively evaluated. Therefore, we aimed to explore the accuracy of NAATs overall followed by comparison between platforms commonly used in Taiwan. METHODS This study enrolled presumptive pulmonary TB patients with NAATs throughout Taiwan. The diagnostic performance of smear microscopy and NAATs was assessed using sputum culture as a reference standard. To investigate the performance of NAATs in excluding non-tuberculous mycobacteria (NTM), we quantified the false-positive proportion of NAATs in patients infected with NTM. RESULTS Of the 4126 enrollees, 860 (20.8%) had positive NAATs. The sensitivity and specificity of NAATs were 83.2% and 96.7%, respectively, compared to 81.5% and 55.3% for smear. There was no significant difference in sensitivity between the NAATs and smear; however, the specificity of smear was significantly lower than that of the NAATs [difference 41.4%, 95% confidence interval (CI) 39.6-43.2%]. There was no significant difference in sensitivity among Roche Cobas Amplicor Mycobacterium tuberculosis assay (Amplicor), Xpert MTB/RIF assay (Xpert) and in-house polymerase chain reaction (in-house PCR) (82.2% versus 83.8% versus 82.4%); however, in-house PCR was significantly less specific than Amplicor (difference 5.3%, 95% CI 2.4-8.2%) and Xpert (difference 5.8%, 95% CI 3.1-8.5%). The sensitivity of NAATs among smear-negative cases was 33.1% (95% CI 26.0-40.3%). In-house PCR had a significantly higher false-positive rate among specimens that were culture positive for NTM than Amplicor (7.7% versus 0.3%; difference 7.4%, 95% CI 3.4-11.5%) and Xpert (7.7% versus 0.7%; difference 7.0%, 95% CI 2.9-11.0%). CONCLUSION The NAATs overall had a relatively high sensitivity and specificity in detecting MTBC while Amplicor and Xpert performed better than in-house PCR in excluding NTM. Our findings will be useful for the development of national policy.
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Affiliation(s)
- Wei-Chang Huang
- Division of Chest Medicine, Department of Internal Medicine, Taichung Veterans General Hospital, Taichung, 407, Taiwan.,Department of Post-Baccalaureate Medicine, College of Medicine, National Chung Hsing University, Taichung, 402, Taiwan.,Department of Translational Medicine, National Chung Hsing University, Taichung, 402, Taiwan.,School of Medicine, Chung Shan Medical University, Taichung, 402, Taiwan.,Department of Industrial Engineering and Enterprise Information, Tunghai University, Taichung, 407, Taiwan.,Department of Medical Technology, Jen-Teh Junior College of Medicine, Nursing and Management, Miaoli, 350, Taiwan
| | - Chih-Bin Lin
- Division of Chest Medicine, Department of Internal Medicine, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien, 970, Taiwan.,School of Medicine, Tzu Chi University, Hualien, 970, Taiwan
| | - Shun-Tien Chien
- Chest Hospital, Ministry of Health and Welfare, Tainan, 701, Taiwan
| | - Jann-Yuan Wang
- Department of Internal Medicine, National Taiwan University Hospital, Taipei, 100, Taiwan.,School of Medicine, College of Medicine, National Taiwan University, Taipei, 100, Taiwan
| | - Chou-Jui Lin
- Taoyuan General Hospital, Ministry of Health and Welfare, Taoyuan, 330, Taiwan
| | - Jia-Yih Feng
- Department of Chest Medicine, Taipei Veterans General Hospital, Taipei, 112, Taiwan.,School of Medicine, National Yang Ming Chiao Tung University, Taipei, 112, Taiwan.,Institute of Emergency and Critical Care Medicine, National Yang Ming Chiao Tung University, Taipei, 112, Taiwan
| | - Chih-Hsin Lee
- Division of Pulmonary Medicine & Pulmonary Research Center, Department of Internal Medicine, Wan Fang Hospital, Taipei Medical University, 111 Xing-Long Road, Section 3, Taipei, 116, Taiwan.,Division of Pulmonary Medicine, Department of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei, 110, Taiwan
| | - Chin-Chung Shu
- Department of Internal Medicine, National Taiwan University Hospital, Taipei, 100, Taiwan.,School of Medicine, College of Medicine, National Taiwan University, Taipei, 100, Taiwan
| | - Ming-Chih Yu
- Division of Pulmonary Medicine & Pulmonary Research Center, Department of Internal Medicine, Wan Fang Hospital, Taipei Medical University, 111 Xing-Long Road, Section 3, Taipei, 116, Taiwan.,School of Respiratory Therapy, College of Medicine, Taipei Medical University, Taipei, 110, Taiwan
| | - Jen-Jyh Lee
- Division of Chest Medicine, Department of Internal Medicine, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien, 970, Taiwan.,School of Medicine, Tzu Chi University, Hualien, 970, Taiwan
| | - Chen-Yuan Chiang
- Division of Pulmonary Medicine & Pulmonary Research Center, Department of Internal Medicine, Wan Fang Hospital, Taipei Medical University, 111 Xing-Long Road, Section 3, Taipei, 116, Taiwan. .,Division of Pulmonary Medicine, Department of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei, 110, Taiwan. .,International Union Against Tuberculosis and Lung Disease, Paris, France.
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Khumsri J, Hanvoravongchai P, Hiransuthikul N, Chuchottaworn C. Cost-Effectiveness Analysis of Xpert MTB/RIF for Multi-Outcomes of Patients With Presumptive Pulmonary Tuberculosis in Thailand. Value Health Reg Issues 2020; 21:264-271. [PMID: 32388198 DOI: 10.1016/j.vhri.2019.09.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Revised: 08/22/2019] [Accepted: 09/30/2019] [Indexed: 11/17/2022]
Abstract
OBJECTIVES The cost-effectiveness of screening adult patients for pulmonary tuberculosis is not clear. As such, this study aims to identify the cost-effectiveness between the Xpert MTB/RIF assay and the sputum acid-fast bacilli (AFB) smear. Multi-outcomes were correct diagnosis, time to achieve correct diagnosis, and gain in quality-adjusted life-years (QALYs). METHODS A decision tree model was constructed to reveal a possible clinical pathway of tuberculosis diagnosis. The researchers used a clinical study to establish the probability of all clinical pathways for input into this model. The sample size was calculated following the correct diagnosis. Participants were randomly divided into 2 groups. A structural questionnaire and the Thai version of quality of life (EQ-5D-5L) were used for interviewing. RESULTS The results showed that the time to achieve the correct diagnosis for the group using Xpert MTB/RIF was shorter than that for the group using the sputum AFB smear. Both the correct diagnosis and QALYs of the base case analysis presented the Xpert MTB/RIF method as dominant. A Monte Carlo model, which analyzed the Xpert MTB/RIF method, revealed that the average number of patients who were correctly diagnosed was 673, the QALYs were 945.85 years, and the total cost was $143 110.64. For the sputum AFB smear method, the average number who received a correct diagnosis was 592, the QALYs were 940.40 years, and the total cost was $196 666.84. Probabilistic and one-way sensitivity analysis confirmed that the Xpert MTB/RIF remained dominant. CONCLUSIONS These results provide useful information for the National Strategic Plan to screen all adult patients for pulmonary tuberculosis.
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Affiliation(s)
- Jiraporn Khumsri
- Department of Medical Services, Nopparat Rajathanee Hospital, Ministry of Public Health, Bangkok, Thailand; Department of Preventive and Social Medicine, Chulalongkorn University, Bangkok, Thailand
| | - Piya Hanvoravongchai
- Department of Preventive and Social Medicine, Chulalongkorn University, Bangkok, Thailand; Thailand Research Center for Health Services System, Chulalongkorn University, Bangkok, Thailand
| | - Narin Hiransuthikul
- Department of Preventive and Social Medicine, Chulalongkorn University, Bangkok, Thailand.
| | - Charoen Chuchottaworn
- Department of Medical Services, Central Chest Institute of Thailand, Ministry of Public Health, Nonthaburi, Thailand
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Bilinski A, Neumann P, Cohen J, Thorat T, McDaniel K, Salomon JA. When cost-effective interventions are unaffordable: Integrating cost-effectiveness and budget impact in priority setting for global health programs. PLoS Med 2017; 14:e1002397. [PMID: 28968399 PMCID: PMC5624570 DOI: 10.1371/journal.pmed.1002397] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Potential cost-effective barriers in cost-effectiveness studies mean that budgetary impact analyses should also be included in post-2015 Sustainable Development Goal projects says Joshua Salomon and colleagues.
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Affiliation(s)
- Alyssa Bilinski
- Interfaculty Initiative in Health Policy, Harvard University, Cambridge, Massachusetts, United States of America
- * E-mail:
| | - Peter Neumann
- Center for Evaluation and Risk in Health, Tufts Medical Center, Boston, Massachusetts, United States of America
| | - Joshua Cohen
- Center for Evaluation and Risk in Health, Tufts Medical Center, Boston, Massachusetts, United States of America
| | - Teja Thorat
- Center for Evaluation and Risk in Health, Tufts Medical Center, Boston, Massachusetts, United States of America
| | - Katherine McDaniel
- School of Social and Political Science, University of Edinburgh, Edinburgh, Scotland, United Kingdom
| | - Joshua A. Salomon
- Center for Health Policy and the Center for Primary Care and Outcomes Research, Stanford University, Stanford, California, United States of America
- Department of Global Health and Population, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, United States of America
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Yang R, Zhang H, Xiong Y, Gui X, Zhang Y, Deng L, Gao S, Luo M, Hou W, Guo D. Molecular diagnosis of central nervous system opportunistic infections and mortality in HIV-infected adults in Central China. AIDS Res Ther 2017; 14:24. [PMID: 28469695 PMCID: PMC5414136 DOI: 10.1186/s12981-017-0150-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Accepted: 04/20/2017] [Indexed: 01/20/2023] Open
Abstract
BACKGROUND CSF PCR is the standard diagnostic technique used in resource-rich settings to detect pathogens of the CNS infection. However, it is not currently used for routine CSF testing in China. Knowledge of CNS opportunistic infections among people living with HIV in China is limited. METHODS Intensive cerebrospiral fluid (CSF) testing was performed to evaluate for bacterial, viral and fungal etiologies. Pathogen-specific primers were used to detect DNA from cytomegalovirus (CMV), herpes simplex virus (HSV), varicella-zoster virus (VZV), Epstein-Barr virus (EBV), human herpesvirus 6 (HHV-6) and John Cunningham virus (JCV) via real-time polymerase chain reaction (PCR). RESULTS Cryptococcal meningitis accounted for 63.0% (34 of 54) of all causes of meningitis, 13.0% (7/54) for TB, 9.3% (5/54) for Toxoplasma gondii. Of 54 samples sent for viral PCR, 31.5% (17/54) were positive, 12 (22.2%) for CMV, 2 (3.7%) for VZV, 1 (1.9%) for EBV, 1 (1.9%) for HHV-6 and 1 (1.9%) for JCV. No patient was positive for HSV. Pathogen-based treatment and high GCS score tended to have a lower mortality rate, whereas patients with multiple pathogens infection, seizures or intracranial hypertension showed higher odds of death. CONCLUSION CNS OIs are frequent and multiple pathogens often coexist in CSF. Cryptococcal meningitis is the most prevalent CNS disorders among AIDS. The utility of molecular diagnostics for pathogen identification combined with the knowledge provided by the investigation may improve the diagnosis of AIDS related OIs in resource-limited developing countries, but the cost-efficacy remains to be further evaluated.
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Cowan JF, Chandler AS, Kracen E, Park DR, Wallis CK, Liu E, Song C, Persing DH, Fang FC. Clinical Impact and Cost-effectiveness of Xpert MTB/RIF Testing in Hospitalized Patients With Presumptive Pulmonary Tuberculosis in the United States. Clin Infect Dis 2017; 64:482-489. [PMID: 28172666 PMCID: PMC5399932 DOI: 10.1093/cid/ciw803] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2016] [Accepted: 12/01/2016] [Indexed: 11/12/2022] Open
Abstract
Background Microscopic examination of acid-fast-stained sputum smears is the current standard of care in the United States to determine airborne infection isolation (AII) of inpatients with presumptive pulmonary tuberculosis (PTB). However, nucleic acid amplification testing (NAAT) with the Xpert MTB/RIF assay (Xpert) may be more efficient and less costly. Methods This prospective observational cohort study enrolled a consecutive sample of 318 AII-eligible inpatients from a public hospital in Seattle, Washington, from March 2012 to October 2013. Sputum samples were collected from each inpatient and analyzed using smear microscopy, culture, drug susceptibility testing, and NAAT. The performance, clinical utility (AII duration and survival), and cost-effectiveness from an institutional perspective were compared for 5 testing strategies. Results Among the 318 admissions with presumptive PTB, 20 (6.3%) were culture-positive for Mycobacterium tuberculosis. The sensitivity of 1 Xpert, 2 Xperts, 2 smears, or 3 smears compared to culture was 0.85 (95% confidence interval [CI], .61–.96), 0.95 (95% CI, .73–1.0), 0.70 (95% CI, .46–.88), and 0.80 (95% CI, .56–.93), respectively. A cost-effectiveness analysis of the study results demonstrated that an Xpert test on 1 unconcentrated sputum sample (assuming equivalent results for unconcentrated and concentrated sputum samples) is the most cost-effective strategy (99.9% preferred at willingness-to-pay of US$50000) and on average would save 51.5 patient-hours in AII and up to $11466 relative to microscopy without a compromise in sensitivity. Conclusions In hospitalized patients with presumptive PTB in a low-burden setting, NAAT can reduce AII and is comparably sensitive, more specific, and more cost-effective than smear microscopy.
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Affiliation(s)
- James F Cowan
- Department of Global Health, University of Washington Schools of Medicine and Public Health
| | | | - Elizabeth Kracen
- Department of Medicine, University of Washington School of Medicine
| | - David R Park
- Department of Global Health, University of Washington Schools of Medicine and Public Health
- Harborview Medical Center
| | - Carolyn K Wallis
- Harborview Medical Center
- Department of Laboratory Medicine, University of Washington School of Medicine, Seattle
| | | | | | | | - Ferric C Fang
- Harborview Medical Center
- Department of Laboratory Medicine, University of Washington School of Medicine, Seattle
- Department of Microbiology, University of Washington School of Medicine, Seattle
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Bates M, Zumla A. The development, evaluation and performance of molecular diagnostics for detection of Mycobacterium tuberculosis. Expert Rev Mol Diagn 2016; 16:307-22. [PMID: 26735769 DOI: 10.1586/14737159.2016.1139457] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The unique pathogenesis of tuberculosis (TB) poses several barriers to the development of accurate diagnostics: a) the establishment of life-long latency by Mycobacterium tuberculosis (M.tb) after primary infection confounds the development of classical antibody or antigen based assays; b) our poor understanding of the molecular pathways that influence progression from latent to active disease; c) the intracellular nature of M.tb infection in tissues means that M.tb and/or its components, are not readily detectable in peripheral specimens; and d) the variable presence of M.tb bacilli in specimens from patients with extrapulmonary TB or children. The literature on the current portfolio of molecular diagnostics tests for TB is reviewed here and the developmental pipeline is summarized. Also reviewed are data from recently published operational research on the GeneXpert MTB/RIF assay and discussed are the lessons that can be taken forward for the design of studies to evaluate the impact of TB diagnostics.
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Affiliation(s)
- Matthew Bates
- a UNZA-UCLMS Research & Training Programme , University Teaching Hospital , Lusaka , Zambia.,b Centre for Clinical Microbiology, Division of Infection and Immunity , University College London , London , UK
| | - Alimuddin Zumla
- a UNZA-UCLMS Research & Training Programme , University Teaching Hospital , Lusaka , Zambia.,b Centre for Clinical Microbiology, Division of Infection and Immunity , University College London , London , UK.,c NIHR Biomedical Research Centre , University College London Hospitals , London , UK
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