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Garcia-Zamalloa A, Vicente D, Arnay R, Arrospide A, Taboada J, Castilla-Rodríguez I, Aguirre U, Múgica N, Aldama L, Aguinagalde B, Jimenez M, Bikuña E, Basauri MB, Alonso M, Perez-Trallero E. Diagnostic accuracy of adenosine deaminase for pleural tuberculosis in a low prevalence setting: A machine learning approach within a 7-year prospective multi-center study. PLoS One 2021; 16:e0259203. [PMID: 34735491 PMCID: PMC8568264 DOI: 10.1371/journal.pone.0259203] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2021] [Accepted: 10/14/2021] [Indexed: 11/17/2022] Open
Abstract
OBJECTIVE To analyze the performance of adenosine deaminase in pleural fluid combined with other parameters routinely measured in clinical practice and assisted by machine learning algorithms for the diagnosis of pleural tuberculosis in a low prevalence setting, and secondly, to identify effusions that are non-tuberculous and most likely malignant. PATIENTS AND METHODS We prospectively analyzed 230 consecutive patients diagnosed with lymphocytic exudative pleural effusion from March 2013 to June 2020. Diagnosis according to the composite reference standard was achieved in all cases. Pre-test probability of pleural tuberculosis was 3.8% throughout the study period. Parameters included were: levels of adenosine deaminase, pH, glucose, proteins, and lactate dehydrogenase, red and white cell counts and lymphocyte percentage in pleural fluid, as well as age. We tested six different machine learning-based classifiers to categorize the patients. Two different classifications were performed: a) tuberculous/non-tuberculous and b) tuberculous/malignant/other. RESULTS Out of a total of 230 patients with pleural effusion included in the study, 124 were diagnosed with malignant effusion and 44 with pleural tuberculosis, while 62 were given other diagnoses. In the tuberculous/non-tuberculous classification, and taking into account the validation predictions, the support vector machine yielded the best result: an AUC of 0.98, accuracy of 97%, sensitivity of 91%, and specificity of 98%, whilst in the tuberculous/malignant/other classification, this type of classifier yielded an overall accuracy of 80%. With this three-class classifier, the same sensitivity and specificity was achieved in the tuberculous/other classification, but it also allowed the correct classification of 90% of malignant cases. CONCLUSION The level of adenosine deaminase in pleural fluid together with cell count, other routine biochemical parameters and age, combined with a machine-learning approach, is suitable for the diagnosis of pleural tuberculosis in a low prevalence scenario. Secondly, non-tuberculous effusions that are suspected to be malignant may also be identified with adequate accuracy.
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Affiliation(s)
- Alberto Garcia-Zamalloa
- Internal Medicine Service, Osakidetza/Basque Health Service, Mendaro Hospital, Gipuzkoa, Spain.,Mycobacterial Infection Study Group (GEIM), From the Spanish Infectious Diseases Society, Spain
| | - Diego Vicente
- Microbiology Department, Respiratory Infection and Antimicrobial Resistance Group. Osakidetza/Basque Health Service, Biodonostia Health Research Institute, Donostia University Hospital, Gipuzkoa, Spain.,Faculty of Medicine, University of the Basque Country, UPV/EHU, Gipuzkoa, Donostia, Spain
| | - Rafael Arnay
- Departamento de Ingeniería Informática y de Sistemas, Universidad de La Laguna, Santa Cruz de Tenerife, Spain
| | - Arantzazu Arrospide
- Gipuzkoa Primary Care-Integrated Health Organisation Research Unit, Osakidetza/Basque Health Service, Debagoiena Integrated Health Organisation, Alto Deba Hospital, Arrasate-Mondragon, Spain.,Epidemiology and Public Health Area, Economic Evaluation of Chronic Diseases Research Group, Biodonostia Health Research Institute, Donostia, Spain.,Kronikgune Institute for Health Services Research, Bizkaia/Barakaldo, Spain.,Health Services Research on Chronic Patients Network (REDISSEC), Spain
| | - Jorge Taboada
- Preventive Medicine and Western Gipuzkoa Clinical Research Unit, Osakidetza/Basque Health Service, Mendaro Hospital, Gipuzkoa, Spain
| | - Iván Castilla-Rodríguez
- Departamento de Ingeniería Informática y de Sistemas, Universidad de La Laguna, Santa Cruz de Tenerife, Spain.,Health Services Research on Chronic Patients Network (REDISSEC), Spain
| | - Urko Aguirre
- Kronikgune Institute for Health Services Research, Bizkaia/Barakaldo, Spain.,Health Services Research on Chronic Patients Network (REDISSEC), Spain.,Osakidetza/Basque Health Service, Research Unit, Galdakao University Hospital, Bizkaia, Spain
| | - Nekane Múgica
- Pneumology Service, Osakidetza/Basque Health Service, Donostia University Hospital, Gipuzkoa. Spain
| | - Ladislao Aldama
- Pneumology Service, Osakidetza/Basque Health Service, Donostia University Hospital, Gipuzkoa. Spain
| | - Borja Aguinagalde
- Thoracic Surgery Service, Osakidetza/Basque Health Service, Donostia University Hospital, Gipuzkoa, Spain
| | - Montserrat Jimenez
- Epidemiological Surveillance Unit, Health Department, Basque Government, Gipuzkoa, Spain
| | - Edurne Bikuña
- Epidemiological Surveillance Unit, Health Department, Basque Government, Gipuzkoa, Spain
| | - Miren Begoña Basauri
- Biochemistry Laboratory, Osakidetza/Basque Health Service, Mendaro Hospital, Gipuzkoa, Spain
| | - Marta Alonso
- Microbiology Department, Respiratory Infection and Antimicrobial Resistance Group. Osakidetza/Basque Health Service, Biodonostia Health Research Institute, Donostia University Hospital, Gipuzkoa, Spain
| | - Emilio Perez-Trallero
- Microbiology Department, Respiratory Infection and Antimicrobial Resistance Group. Osakidetza/Basque Health Service, Biodonostia Health Research Institute, Donostia University Hospital, Gipuzkoa, Spain
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Dowling WB, Whitelaw A, Nel P. Tracing TB: Are there predictors for active TB disease in patients with Xpert Ultra trace results? Int J Infect Dis 2021; 114:115-123. [PMID: 34740802 DOI: 10.1016/j.ijid.2021.10.056] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2021] [Revised: 10/07/2021] [Accepted: 10/28/2021] [Indexed: 12/17/2022] Open
Abstract
OBJECTIVES The Xpert MTB/Rif Ultra (Xpert Ultra; Cepheid, USA) has increased sensitivity compared with its predecessor (Gene Xpert), due to the addition of multicopy amplification targets and a novel trace call. The World Health Organization suggests that tuberculosis (TB) treatment should be initiated in HIV, paediatric, and extra-pulmonary TB patients with trace results. However, other factors such as previous TB disease may complicate the interpretation of trace results in high-burden TB settings. This study aimed to clarify the positive predictors for active TB disease in patients with trace results and to investigate if previous TB disease influences TB culture positivity. METHODS A retrospective descriptive study was performed on 290 patients with trace results, to determine what the positive predictors for active TB are by comparing clinical factors to TB culture. RESULTS The key findings of this study were that extra-pulmonary TB samples (OR, 2.7; p=0.012), no previous TB disease (OR, 4.5; p=0.001) and symptoms suggestive of TB (OR, 6.4; p<0.001) are independent predictors for active TB disease. CONCLUSION This study found readily available clinical predictors that can aid clinicians with TB management decisions in patients with trace results.
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Affiliation(s)
- Wentzel Bruce Dowling
- Division of Medical Microbiology and Immunology, University of Stellenbosch, Cape Town, South Africa; National Health Laboratory Service, Tygerberg Hospital, Cape Town, South Africa.
| | - Andrew Whitelaw
- Division of Medical Microbiology and Immunology, University of Stellenbosch, Cape Town, South Africa; National Health Laboratory Service, Tygerberg Hospital, Cape Town, South Africa.
| | - Pieter Nel
- Division of Medical Microbiology and Immunology, University of Stellenbosch, Cape Town, South Africa; National Health Laboratory Service, Tygerberg Hospital, Cape Town, South Africa.
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Thiagarajan D, Teh DAL, Ahmad Tarmidzi NA, Ishak H, Abu Bakar Z, Bastion MLC. Tuberculous pleural effusion in a patient with sympathetic ophthalmia on immunosuppression: a case report. Trop Dis Travel Med Vaccines 2021; 7:27. [PMID: 34649627 PMCID: PMC8516487 DOI: 10.1186/s40794-021-00153-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Accepted: 08/26/2021] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Tuberculous pleural effusion (TPE) is paucibacillary, making its diagnosis difficult based on laboratory investigations alone. We present a case of a patient with a TPE who was initially misdiagnosed to have azathioprine-induced lung injury. The diagnosis of TPE was arrived at with the help of clinical assessment, laboratory and radiological investigations. CASE PRESENTATION A 25-year-old chronic smoker with sympathetic ophthalmia on long-term immunosuppression, latent tuberculosis infection and a significant family history of tuberculosis presented with a three-week history of productive cough, low-grade fever, night sweats and weight loss. Examination of the lungs showed reduced breath sounds at the right lower zone. Chest x-ray showed minimal right pleural effusion with a small area of right upper lobe consolidation. The pleural fluid was exudative with predominant mononuclear leukocytes. Direct smears of sputum and pleural fluid; polymerase chain reaction of pleural fluid; and sputum, pleural fluid and blood cultures were negative for M. tuberculosis (MTB) and other organisms. As he did not respond to a course of broad-spectrum antibiotics, he was then treated as a case of azathioprine-induced lung injury. However, his condition did not improve despite the cessation of azathioprine. A contrast-enhanced computed tomography of the thorax showed right upper lobe consolidation with tree-in-bud changes, bilateral lung atelectasis, subpleural nodule, mild right pleural effusion and mediastinal lymphadenopathy. Bronchoalveolar lavage was negative for malignant cells and microorganisms including, MTB. However, no pleural biopsy was done. He was empirically treated with anti-tubercular therapy for 9 months duration and showed complete recovery. CONCLUSION A high index of suspicion for TPE is required in individuals with immunosuppression living in regions endemic to tuberculosis. Targeted investigations and sound clinical judgement allow early diagnosis and prompt treatment initiation to prevent morbidity and mortality.
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Affiliation(s)
- Dharshana Thiagarajan
- Department of Ophthalmology, Hospital Kuala Lumpur, Ministry of Health Malaysia, Kuala Lumpur, Malaysia.
- Department of Ophthalmology, Faculty of Medicine, Hospital Canselor Tuanku Muhriz, Kuala Lumpur, Malaysia.
| | - Daphne Ai Lin Teh
- Department of Ophthalmology, Hospital Kuala Lumpur, Ministry of Health Malaysia, Kuala Lumpur, Malaysia
| | - Nor Azita Ahmad Tarmidzi
- Department of Ophthalmology, Hospital Kuala Lumpur, Ministry of Health Malaysia, Kuala Lumpur, Malaysia
| | - Hamisah Ishak
- Department of Ophthalmology, Hospital Kuala Lumpur, Ministry of Health Malaysia, Kuala Lumpur, Malaysia
| | - Zamzurina Abu Bakar
- Institute of Respiratory Medicine, Hospital Kuala Lumpur, Ministry of Health Malaysia, Kuala Lumpur, Malaysia
| | - Mae-Lynn Catherine Bastion
- Department of Ophthalmology, Faculty of Medicine, Hospital Canselor Tuanku Muhriz, Kuala Lumpur, Malaysia
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MPT64 antigen detection test improves diagnosis of pediatric extrapulmonary tuberculosis in Mbeya, Tanzania. Sci Rep 2021; 11:17540. [PMID: 34475471 PMCID: PMC8413277 DOI: 10.1038/s41598-021-97010-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Accepted: 08/17/2021] [Indexed: 12/20/2022] Open
Abstract
Pediatric extrapulmonary tuberculosis (EPTB) is a diagnostic challenge. A new immunochemistry based MPT64 antigen detection test has shown improved sensitivity compared to current laboratory tests. The aim of this study was to implement and validate the test performance in a resource limited African setting. Presumptive pediatric (0–18 y) EPTB patients were prospectively enrolled at Mbeya Zonal Referral Hospital, and followed to the end of treatment or until a final diagnosis was reached. Specimens from suspected sites of infection were subject to routine diagnostics, GeneXpert MTB/RIF assay and the MPT64 test. The performance of the tests was assessed using mycobacterial culture as well as a composite reference standard. 30 patients were categorized as TB cases, 31 as non-TB cases and 2 were uncategorized. In the TB group, the three most common infections were adenitis (30%), peritonitis (30%) and meningitis (20%). The sensitivity, specificity, positive predictive value, negative predictive value and accuracy of the MPT64 test was 92%, 88%, 87%, 92% and 90%, respectively. Mortality was equally high among TB/non-TB cases (23% vs 21%), and malnutrition was the main comorbidity among TB cases. The MPT64 test was implementable in the routine diagnostics in a low-resource setting and improved the diagnosis of pediatric EPTB.
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Sun B, Sun Y. Diagnostic performance of DNA microarray for detecting rifampicin and isoniazid resistance in Mycobacterium tuberculosis. J Thorac Dis 2021; 13:4448-4454. [PMID: 34422371 PMCID: PMC8339777 DOI: 10.21037/jtd-21-913] [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: 04/30/2021] [Accepted: 07/06/2021] [Indexed: 12/04/2022]
Abstract
Background While rifampicin (RFP) and isoniazid (INH) are the most commonly used first-line antituberculosis drugs, multidrug resistance in Mycobacterium tuberculosis poses a threat to the success of tuberculosis (TB) control programs. Clinical practice guidelines and expert consensuses recommend drug susceptibility testing (DST) before the initiation of antituberculosis treatment. However, traditional DST is time-consuming and has high requirements for laboratory conditions. The recently developed molecular diagnostic techniques, such as DNA microarray, offer new options. We thus investigated the diagnostic value of DNA microarray in detecting RFP + INH-resistant TB, with an attempt to identify simple, efficient, and accurate drug-resistant TB testing methods. Methods The clinical features and DST results of patients diagnosed with pulmonary tuberculosis by Bactec MGIT 960 liquid culture system (Becton, Dickinson and Company, Franklin Lakes, NJ, USA) who received DNA microarray analysis in our center from July 2019 to July 2020 were retrospectively analyzed. Level of agreement between liquid culture and DNA microarray technology was assessed by using the Cohen kappa coefficient. With the results of liquid culture as the gold standard, the sensitivity and specificity of the DNA microarray were calculated, and the receiver operating characteristic (ROC) curves were used to assess the diagnostic values of the DNA microarray in detecting RFP + INH-resistant TB. Results A total of 825 patients were enrolled. The sensitivity and specificity of DNA microarray were 0.84 and 0.94, respectively, in the detection of RFP resistance, with an area under the curve (AUC) of 0.89 [95% confidence interval (CI): 0.87–0.91)] and a Cohen kappa coefficient of 0.78 (95% CI: 0.72–0.83). For INH resistance, the sensitivity and specificity of the DNA microarray were 0.73 and 0.97, respectively, with an AUC of 0.85 (95% CI: 0.82–0.87) and a Cohen kappa coefficient of 0.75 (95% CI: 0.70–0.80). Conclusions The DNA microarray had high specificity and sensitivity in detecting RFP + INH-resistant TB. As a rapid, accurate, and practical technique, it can be routinely performed in clinical laboratories.
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Affiliation(s)
- Bingqi Sun
- Department of Laboratory Medicine, No. 10 People's Hospital of Shenyang, Shenyang, China
| | - Ying Sun
- Department of Oncology, No. 10 People's Hospital of Shenyang, Shenyang, China
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Binjomah AZ, Alnimr AM, Zareah SM, Alharbi SF, Alasmari KS, Aldosari KM, Alduealej IM. The diagnostic impact of implementing a molecular-based algorithm to standard mycobacterial screening at a reference laboratory with an intermediate prevalence for non-respiratory samples. Saudi J Biol Sci 2021; 28:4103-4108. [PMID: 34354388 PMCID: PMC8324989 DOI: 10.1016/j.sjbs.2021.05.080] [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: 03/17/2021] [Revised: 05/29/2021] [Accepted: 05/30/2021] [Indexed: 11/17/2022] Open
Abstract
Rapid, reliable results can be given by molecular, direct detection and identification of the Mycobacterium tuberculosis (MTB/Mtb) complex from clinical samples. The Xpert MTB/RIF assay is an assay that has been availablefor more than a decade for identification of Mycobacterium tuberculosis and resistance to rifampicin. However, there is minimal evidence on its clinical usefulness in paucibacillary, non-respiratory samples. The Xpert MTB/RIF assay clinical utility index, its diagnostic characteristics and the number required to diagnose 2935 non-respiratory specimens submitted for routine mycobacterial work-up in a reference laboratory in an intermediate prevalence setting per specimen form were evaluated. The Xpert MTB/RIF assay showed a variable clinical utility index and number required to diagnose (NND) depending on the type of specimen, which was moderate in tissue biopsies (NND = 1.8) and excellent in pus and urine samples, compared to acid-fast microscopy and culture as a gold standard technique (NND = 1.1 and 1.2). Microscopy, on the other hand, consistently showed a weak to fair index of clinical usefulness in all specimen forms, with in NND of 2.3-12.5. The NND for detecting tuberculous infection in the cerebrospinal fluid by the Xpert MTB/RIF assay was noted to be 1.2, with a moderate clinical utility index of 0.8. The evidence presented indicates that the overall appropriate diagnostic utility of the Xpert MTB/RIF assay is clinically successful in most non-respiratory samples. To check the cost-effectiveness and prognostic effect of integrating this completely automated molecular-based assay into the routine testing algorithm for non-respiratory mycobacterial specimens, further data must be collected.
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Affiliation(s)
- Abdulwahab Z. Binjomah
- Riyadh Regional Laboratory and Blood Bank, Mycobacteriology Reference Laboratory, Imam Abdulaziz Bin Mohammed Bin Saud Street, Ulaishah, 3485, Riyadh 12746, Saudi Arabia
- College of Medicine, Alfaisal University, Takhassusi Street, Riyadh 11533, Saudi Arabia
| | - Amani M. Alnimr
- Department of Microbiology, King Fahad Hospital of the University, College of Medicine, Imam Abdulrahman Bin Faisal University, King Faisal Road, Dammam 34212, Saudi Arabia
| | - Suzan M. Zareah
- Riyadh Regional Laboratory and Blood Bank, Mycobacteriology Reference Laboratory, Imam Abdulaziz Bin Mohammed Bin Saud Street, Ulaishah, 3485, Riyadh 12746, Saudi Arabia
| | - Shafi F. Alharbi
- Riyadh Regional Laboratory and Blood Bank, Mycobacteriology Reference Laboratory, Imam Abdulaziz Bin Mohammed Bin Saud Street, Ulaishah, 3485, Riyadh 12746, Saudi Arabia
| | - Khalid S. Alasmari
- Riyadh Regional Laboratory and Blood Bank, Mycobacteriology Reference Laboratory, Imam Abdulaziz Bin Mohammed Bin Saud Street, Ulaishah, 3485, Riyadh 12746, Saudi Arabia
| | - Kamel M. Aldosari
- Riyadh Regional Laboratory and Blood Bank, Mycobacteriology Reference Laboratory, Imam Abdulaziz Bin Mohammed Bin Saud Street, Ulaishah, 3485, Riyadh 12746, Saudi Arabia
| | - Ibrahim M. Alduealej
- Riyadh Regional Laboratory and Blood Bank, Mycobacteriology Reference Laboratory, Imam Abdulaziz Bin Mohammed Bin Saud Street, Ulaishah, 3485, Riyadh 12746, Saudi Arabia
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Shen Y, Yu G, Zhao W, Lang Y. Efficacy of Xpert MTB/RIF Ultra in diagnosing tuberculosis meningitis: A systematic review and meta-analysis. Medicine (Baltimore) 2021; 100:e26778. [PMID: 34398057 PMCID: PMC8294889 DOI: 10.1097/md.0000000000026778] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Accepted: 06/30/2021] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND This study aimed to assess whether Xpert MTB/RIF Ultra (Xpert Ultra) can effectively diagnose tuberculosis meningitis (TBM) and to simultaneously compare its effectiveness with Xpert in diagnosing TBM in the same population. METHODS On August 12, 2020, Wanfang Database, China National Knowledge Infrastructure, Embase, Cochrane Library, and PubMed were searched for studies evaluating the diagnostic accuracy of Xpert Ultra for TBM. Then, we assessed the efficacy of Xpert Ultra against a composite reference standard and culture. If applicable, we also examined the diagnostic efficacy of Xpert in the same population. Heterogeneity was then explored by meta-regression, subgroup, and sensitivity analyses. RESULTS Six studies containing 601 specimens reported the diagnostic efficacy of Xpert Ultra for TBM, with a composite reference standard. No study had compared the efficacy between Xpert Ultra and culture. The pooled sensitivity of Xpert Ultra was 64% (95% confidence interval [CI]: 45-80), and the I2 value was 86% (95% CI: 76-96); its specificity for TBM was consistently 100%. In the same population, 5 studies compared the diagnostic efficacy between Xpert Ultra and Xpert for TBM. The pooled sensitivity of Xpert Ultra and Xpert was 68% (95% CI: 46-84; I2 = 87%) and 37% (95% CI: 25-50; I2 = 72%), respectively. The studies were significantly heterogeneous in terms of sensitivity but not heterogeneous in specificity. CONCLUSIONS Xpert Ultra was more sensitive than Xpert, but both were specific (100%). Therefore, Xpert Ultra had an excellent diagnostic efficacy for TBM, and it could be the preferred initial test for TBM.
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Oreskovic A, Panpradist N, Marangu D, Ngwane MW, Magcaba ZP, Ngcobo S, Ngcobo Z, Horne DJ, Wilson DPK, Shapiro AE, Drain PK, Lutz BR. Diagnosing Pulmonary Tuberculosis by Using Sequence-Specific Purification of Urine Cell-Free DNA. J Clin Microbiol 2021; 59:e0007421. [PMID: 33789959 PMCID: PMC8373247 DOI: 10.1128/jcm.00074-21] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Accepted: 03/19/2021] [Indexed: 01/17/2023] Open
Abstract
Transrenal urine cell-free DNA (cfDNA) is a promising tuberculosis (TB) biomarker, but is challenging to detect because of the short length (<100 bp) and low concentration of TB-specific fragments. We aimed to improve the diagnostic sensitivity of TB urine cfDNA by increasing recovery of short fragments during sample preparation. We developed a highly sensitive sequence-specific purification method that uses hybridization probes immobilized on magnetic beads to capture short TB cfDNA (50 bp) with 91.8% average efficiency. Combined with short-target PCR, the assay limit of detection was ≤5 copies of cfDNA in 10 ml urine. In a clinical cohort study in South Africa, our urine cfDNA assay had 83.7% sensitivity (95% CI: 71.0 to 91.5%) and 100% specificity (95% CI: 86.2 to 100%) for diagnosis of active pulmonary TB when using sputum Xpert MTB/RIF as the reference standard. The detected cfDNA concentration was 0.14 to 2,804 copies/ml (median 14.6 copies/ml) and was inversely correlated with CD4 count and days to culture positivity. Sensitivity was nonsignificantly higher in HIV-positive (88.2%) compared to HIV-negative patients (73.3%), and was not dependent on CD4 count. Sensitivity remained high in sputum smear-negative (76.0%) and urine lipoarabinomannan (LAM)-negative (76.5%) patients. With improved sample preparation, urine cfDNA is a viable biomarker for TB diagnosis. Our assay has the highest reported accuracy of any TB urine cfDNA test to date and has the potential to enable rapid non-sputum-based TB diagnosis across key underserved patient populations.
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Affiliation(s)
- Amy Oreskovic
- Department of Bioengineering, University of Washington, Seattle, Washington, USA
| | - Nuttada Panpradist
- Department of Bioengineering, University of Washington, Seattle, Washington, USA
| | - Diana Marangu
- Department of Paediatrics and Child Health, University of Nairobi, Nairobi, Kenya
| | - M. William Ngwane
- Umkhuseli Innovation and Research Management, Pietermaritzburg, South Africa
| | - Zanele P. Magcaba
- Umkhuseli Innovation and Research Management, Pietermaritzburg, South Africa
| | - Sindiswa Ngcobo
- Umkhuseli Innovation and Research Management, Pietermaritzburg, South Africa
| | - Zinhle Ngcobo
- Umkhuseli Innovation and Research Management, Pietermaritzburg, South Africa
| | - David J. Horne
- Department of Medicine, University of Washington, Seattle, Washington, USA
- Department of Global Health, University of Washington, Seattle, Washington, USA
| | - Douglas P. K. Wilson
- Umkhuseli Innovation and Research Management, Pietermaritzburg, South Africa
- Edendale Hospital, University of KwaZulu-Natal, Pietermaritzburg, South Africa
| | - Adrienne E. Shapiro
- Department of Medicine, University of Washington, Seattle, Washington, USA
- Department of Global Health, University of Washington, Seattle, Washington, USA
| | - Paul K. Drain
- Department of Medicine, University of Washington, Seattle, Washington, USA
- Department of Global Health, University of Washington, Seattle, Washington, USA
| | - Barry R. Lutz
- Department of Bioengineering, University of Washington, Seattle, Washington, USA
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Affiliation(s)
- Ruvandhi R Nathavitharana
- Division of Infectious Diseases, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA
| | - Dolores Freire Jijon
- Universidad de Guayaquil, Guayaquil, Ecuador
- Division of Pediatric Infectious Diseases, University of Alberta, Edmonton, Canada
| | - Pankaj Pal
- Division of Infectious Diseases, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA
| | - Saurabh Rane
- Wadhani Institute for Artificial Intelligence, Mumbai, India
- Survivors Against TB, India
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Bermick JR, Lincoln PM, Allen RM, Kunkel SL, Schaller MA. Elevated Notch ligands in serum are associated with HIV/TB coinfection. J Clin Tuberc Other Mycobact Dis 2021; 24:100258. [PMID: 34307905 PMCID: PMC8258674 DOI: 10.1016/j.jctube.2021.100258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Objective There is a clear need for improved biomarkers to diagnose HIV/TB coinfection. Although numerous tests can identify the existence of both of these microbes within the host, a parallel assessment of the host response to HIV/TB coinfection may prove as useful confirmation in cases where microbiological tests are inconclusive. To this end we assessed the levels of Notch ligands found in serum samples of patients with TB, HIV or HIV/TB coinfection. The Notch system is involved in almost every stage of development, including the maturation of the immune response. Upon exposure to a pathogen, the innate immune system will increase expression of Notch ligands Delta-like 1 and Delta-like 4. Previous research has demonstrated that Notch ligand expression is increased on monocytes from patients diagnosed with tuberculosis. We hypothesized that if Notch ligands were present in the peripheral blood of individuals diagnosed with TB, they may serve as a novel marker for infection. Design: Serum samples from patients with HIV, TB or HIV/TB coinfection were compared to serum from uninfected individuals to determine levels of DLL1 and DLL4 in a case controlled study. Methods DLL1 and DLL4 were measured by ELISA. Linear regression with post tests were used to determine if levels of DLL1 and DLL4 were increased in individuals with HIV/TB coinfection as compared to individuals infected with either HIV or TB or healthy controls. Results Delta-like 1 and Delta-like 4 were significantly increased in the serum of patients with HIV and HIV/ M. tuberculosis coinfection compared to other groups. Conclusions Assessment of Notch ligands in peripheral blood may enhance the diagnosis of individuals with active TB that are co-infected with HIV. The study will also need to be validated in in a larger cohort.
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Affiliation(s)
- Jennifer R Bermick
- Department of Pediatrics, Division of Neonatology, University of Iowa, Iowa City, IA, USA.,Department of Pediatrics, University of Michigan, Ann Arbor, MI, USA
| | - Pamela M Lincoln
- Department of Pathology, University of Michigan, Ann Arbor, MI, USA
| | - Ronald M Allen
- Department of Pathology, University of Michigan, Ann Arbor, MI, USA
| | - Steven L Kunkel
- Department of Pathology, University of Michigan, Ann Arbor, MI, USA
| | - Matthew A Schaller
- Department of Pathology, University of Michigan, Ann Arbor, MI, USA.,Division of Pulmonary, Critical Care and Sleep Medicine, University of Florida, Gainesville, FL, USA
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Berra TZ, Gomes D, Ramos ACV, Alves YM, Bruce ATI, Arroyo LH, dos Santos FL, Souza LLL, Crispim JDA, Arcêncio RA. Effectiveness and trend forecasting of tuberculosis diagnosis after the introduction of GeneXpert in a city in south-eastern Brazil. PLoS One 2021; 16:e0252375. [PMID: 34048490 PMCID: PMC8162696 DOI: 10.1371/journal.pone.0252375] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Accepted: 05/15/2021] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND To evaluate the effectiveness of a rapid molecular test for the detection of tuberculosis (TB) and to predict the rates of disease in a municipality of Brazil where TB is endemic. METHODS An ecological study was carried out in Ribeirão Preto-SP on a population of TB cases notified between 2006 and 2017. Monthly TB incidence rates and the average monthly percentage change (AMPC) were calculated. In order to identify changes in the series, the breakpoint technique was performed; the rates were modelled and predictions of the incidence of TB until 2025 were made. RESULTS AMPC showed a fall of 0.69% per month in TB and human immunodeficiency virus (TB-HIV) co-infection, a fall of 0.01% per month in general and lung TB and a fall of 0.33% per month in extrapulmonary TB. With the breakpoint technique, general and pulmonary TB changed in structure in late 2007, and extrapulmonary TB and TB-HIV co-infection changed in structure after 2014, which is considered the cut-off point. The IMA(3) models were adjusted for general and pulmonary TB and TB-HIV co-infection, and the AR(5) models for extrapulmonary TB, and predictions were performed. CONCLUSIONS The rapid molecular test for TB is the method currently recommended by the WHO for the diagnosis of the disease and its main advantage is to provide faster, more accurate results and to already check for drug resistance. It is necessary that professionals encourage the use of this technology in order to optimize the diagnosis so that the treatment begins as quickly as possible and in an effective way. Only by uniting professionals from all areas with health policies aimed at early case identification and rapid treatment initiation it is possible to break the chain of TB transmission so that its rates decrease and the goals proposed by the WHO are achieved.
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Affiliation(s)
- Thaís Zamboni Berra
- Department of Maternal-Infant and Public Health Nursing, University of São Paulo at Ribeirão Preto College of Nursing, Ribeirão Preto, São Paulo, Brazil
| | - Dulce Gomes
- Mathematics Department in University of Évora, Évora, Portugal
| | - Antônio Carlos Vieira Ramos
- Department of Maternal-Infant and Public Health Nursing, University of São Paulo at Ribeirão Preto College of Nursing, Ribeirão Preto, São Paulo, Brazil
| | - Yan Mathias Alves
- Department of Maternal-Infant and Public Health Nursing, University of São Paulo at Ribeirão Preto College of Nursing, Ribeirão Preto, São Paulo, Brazil
| | - Alexandre Tadashi Inomata Bruce
- Department of Maternal-Infant and Public Health Nursing, University of São Paulo at Ribeirão Preto College of Nursing, Ribeirão Preto, São Paulo, Brazil
| | - Luiz Henrique Arroyo
- Department of Maternal-Infant and Public Health Nursing, University of São Paulo at Ribeirão Preto College of Nursing, Ribeirão Preto, São Paulo, Brazil
| | - Felipe Lima dos Santos
- Department of Maternal-Infant and Public Health Nursing, University of São Paulo at Ribeirão Preto College of Nursing, Ribeirão Preto, São Paulo, Brazil
| | - Ludmilla Leideanne Limirio Souza
- Department of Maternal-Infant and Public Health Nursing, University of São Paulo at Ribeirão Preto College of Nursing, Ribeirão Preto, São Paulo, Brazil
| | - Juliane de Almeida Crispim
- Department of Maternal-Infant and Public Health Nursing, University of São Paulo at Ribeirão Preto College of Nursing, Ribeirão Preto, São Paulo, Brazil
| | - Ricardo Alexandre Arcêncio
- Department of Maternal-Infant and Public Health Nursing, University of São Paulo at Ribeirão Preto College of Nursing, Ribeirão Preto, São Paulo, Brazil
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Fei B, Zhou L, Zhang Y, Luo L, Chen Y. Application value of tissue tuberculosis antigen combined with Xpert MTB/RIF detection in differential diagnoses of intestinal tuberculosis and Crohn's disease. BMC Infect Dis 2021; 21:498. [PMID: 34049506 PMCID: PMC8161674 DOI: 10.1186/s12879-021-06210-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Accepted: 05/19/2021] [Indexed: 01/28/2023] Open
Abstract
Background The purpose of this study was to examine the value of Xpert MTB/RIF assay and detection of additional Mycobacterium tuberculosis complex (MTBC) species antigens from intestinal tissue samples in differentiating intestinal tuberculosis (ITB) from Crohn’s disease (CD). Methods Several clinical specimens of intestinal tissue obtained by either endoscopic biopsy or surgical excision were used for mycobacteriologic solid cultures,Xpert MTB/RIF assays, immunohistochemistry, and histological examinations. Four antigens (38KDa, ESAT-6, MPT64, and Ag85 complex) of MTBC in the intestinal tissue were detected by immunohistochemical analysis. Results The study included 42 patients with ITB and 46 with CD. Perianal lesions and longitudinal ulcers were more common in patients with CD, while caseating granuloma and annular ulcers were more common in patients with ITB. The positive rate of MTBC detected by Xpert MTB/RIF in intestinal tissues of patients with ITB was 33.33%, which was significantly higher than that in patients with CD and that detected using acid-fast staining smears. It was also higher than that detected by tissue MTBC culture, but the difference was not statistically significant. The positive MPT64 expression rate in patients with ITB was 40.48%, which was significantly higher than that observed in patients with CD. The sensitivity of parallelly combined detection of tuberculosis protein MPT64 and Xpert MTB/RIF in diagnosing ITB was 50.0%. Conclusions The detection of Xpert MTB/RIF in intestinal tissue is a rapid and useful method for establishing an early diagnosis of ITB. The detection of MTBC using Xpert MTB/RIF and MPT64 antigen in intestinal tissues has a definitive value in the differential diagnosis ofITB and CD. The combination of these two methods can improve the detection sensitivity.
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Affiliation(s)
- Baoying Fei
- Department of Gastroenterology, Tongde Hospital of Zhejiang Province, 234 Gucui Road, Hangzhou, 310012, Zhejiang, China.
| | - Lin Zhou
- Departments of Minimally Invasive Surgery, Tuberculous Experimental Center, Hangzhou Red Cross Hospital, Hangzhou, 310003, Zhejiang, China
| | - Yu Zhang
- Department of Gastroenterology, Zhejiang Province People's Hospital, Hangzhou, 310014, Zhejiang, China
| | - Linhe Luo
- Department of Gastroenterology, Tongde Hospital of Zhejiang Province, 234 Gucui Road, Hangzhou, 310012, Zhejiang, China
| | - Yuanyuan Chen
- Tuberculosis Diagnosis and Treatment Center, Hangzhou Red Cross Hospital, Hangzhou, 310003, Zhejiang, China
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Factors associated with negative pleural adenosine deaminase results in the diagnosis of childhood pleural tuberculosis. BMC Infect Dis 2021; 21:473. [PMID: 34034670 PMCID: PMC8152150 DOI: 10.1186/s12879-021-06209-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2021] [Accepted: 05/18/2021] [Indexed: 11/16/2022] Open
Abstract
Background Until now, the influential factors associated with pleural adenosine deaminase (ADA) activity among children remain unclear. This retrospective study was therefore conducted aiming to investigate the factors associated with negative pleural ADA results in the diagnosis of childhood pleural tuberculosis (TB). Methods Between January 2006 and December 2019, children patients with definite or possible pleural TB were recruited for potential analysis. Then, patients were stratified into two categories: negative pleural ADA results group (experimental group, ≤40 U/L) and positive pleural ADA results group (control group, > 40 U/L). Univariate and multivariate logistic regression analyses were performed to estimate risk factors for negative pleural ADA results. Results A total of 84 patients with pleural TB were recruited and subsequently classified as experimental (n = 17) and control groups (n = 67). Multivariate analysis (Hosmer–Lemeshow goodness-of-fit test: χ2 = 1.881, df = 6, P = 0.930) revealed that variables, such as chest pain (age-adjusted OR = 0.0510, 95% CI: 0.004, 0.583), pleural total protein (≤45.3 g/L, age-adjusted OR = 27.7, 95% CI: 2.5, 307.7), pleural lactate dehydrogenase (LDH, ≤505 U/L, age-adjusted OR = 59.9, 95% CI: 4.2, 857.2) and blood urea nitrogen (≤3.2 mmol/L, age-adjusted OR = 32.0, 95% CI: 2.4, 426.9), were associated with negative pleural ADA results when diagnosing childhood pleural TB. Conclusion Our findings demonstrated that chest pain, pleural total protein, pleural LDH, and blood urea nitrogen were associated with a negative pleural ADA result for the diagnosis of pleural TB among children. When interpreting pleural ADA levels in children with these characteristics, a careful clinical assessment is required for the pleural TB diagnosis. Supplementary Information The online version contains supplementary material available at 10.1186/s12879-021-06209-1.
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Agrawal S, Kant S, Das V, Jain A, Mishra S. Limited role of GeneXpert in peritoneal fluid in the diagnosis of genital tuberculosis in infertile women. J Family Med Prim Care 2021; 10:1656-1660. [PMID: 34123908 PMCID: PMC8144761 DOI: 10.4103/jfmpc.jfmpc_1957_20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Revised: 12/05/2020] [Accepted: 01/01/2021] [Indexed: 11/26/2022] Open
Abstract
Background and Objectives: Genital tuberculosis (TB) is an important cause of infertility in women that poses many challenges in diagnosis. The study is done to understand the utility of GeneXpert test in peritoneal fluid in the diagnosis of genital TB in infertile women. Methods: All infertile women in postmenstrual phase who were planned for laparoscopy in study period were included. Women who were already on anti-TB therapy were excluded. Peritoneal fluid/washings were retrieved during laparoscopy to test for Mycobacterium tuberculosis by GeneXpert. A note was made of laparoscopy evidence of TB. Endometrial sample was sent for microbiological testing of mycobacterium on smear and liquid culture. Histopathological test of endometrium was also done to look for granulomas. Results: In a total of 57 women, 8 (14.03%) women were diagnosed with TB on the basis of laparoscopy or microbiological or histopathological tests. Six women had caseating tubercles in pelvis, of them two women had presence of mycobacterium on smear, one woman also had positive liquid culture. In two women endometrial smear was positive. None of the women had a positive GeneXpert test in peritoneal fluid. Conclusion: Genital TB is a clinical problem in infertile women. Even in women with confirmed genital TB the peritoneal fluid/washings were negative for mycobacterium. GeneXpert did not pick Mycobacterium in peritoneal fluid in women with genital TB. Hence, it is not a sensitive and good tool for the diagnosis of female genital TB.
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Affiliation(s)
- Smriti Agrawal
- Departments of Obstetrics and Gynaecology, KGMU, Lucknow, Uttar Pradesh, India
| | - Surya Kant
- Department of Respiratory Medicine, KGMU, Lucknow, Uttar Pradesh, India
| | - Vinita Das
- Departments of Obstetrics and Gynaecology, KGMU, Lucknow, Uttar Pradesh, India
| | - Amita Jain
- Department of Microbiology, KGMU, Lucknow, Uttar Pradesh, India
| | - Shambhavi Mishra
- Department of Statistics, Lucknow University, Lucknow, Uttar Pradesh, India
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Yu G, Shen Y, Xu X, Lin L. Nucleic acid amplification techniques for rapid diagnosis of nontuberculous mycobacteria: A protocol of systematic review and meta-analysis. PLoS One 2021; 16:e0250470. [PMID: 33886648 PMCID: PMC8062022 DOI: 10.1371/journal.pone.0250470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Accepted: 04/01/2021] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Nontuberculous mycobacteria (NTM) infection is similar to Mycobacterium tuberculosis (MTB) infection. Early clinical identification and differentiation of NTM and MTB infections continues to be a major challenge. Nucleic acid amplification tests (NAATs) have the ability to efficiently and rapidly detect pathogens and are widely used in mycobacterial infections. The objective of this study is to estimate the diagnostic accuracy of NAATs for NTM. METHODS We will search candidate studies that assessing the accuracy of NAATs for diagnosis of NTM through PubMed, Embase and the Cochrane Library until May 2021. Studies with full text that meet the inclusion criteria will be included. Following a revised tool for Quality Assessment of Diagnostic Accuracy Studies (QUADAS-2), two researchers will independently evaluate the study quality. The STATA software (version 15.0) will be used to carry out meta-analyses. When heterogeneity is observed, subgroup analyses and meta-regression analyses will be used to explore sources of heterogeneity. Sensitivity analyses will be used to check the robustness of analyses. CONCLUSION We hope that this study will provide meaningful evidence for the early and rapid diagnosis of NAATs for NTM, which will help to guide the treatment of NTM and improve the prognosis of patients.
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Affiliation(s)
- Guocan Yu
- Zhejiang Tuberculosis Diagnosis and Treatment Center, Zhejiang Chinese Medicine and Western Medicine Integrated Hospital, Hangzhou, Zhejiang, 310003, China
| | - Yanqin Shen
- Zhejiang Tuberculosis Diagnosis and Treatment Center, Zhejiang Chinese Medicine and Western Medicine Integrated Hospital, Hangzhou, Zhejiang, 310003, China
| | - Xudong Xu
- Zhejiang Tuberculosis Diagnosis and Treatment Center, Zhejiang Chinese Medicine and Western Medicine Integrated Hospital, Hangzhou, Zhejiang, 310003, China
| | - Lihua Lin
- Zhejiang Tuberculosis Diagnosis and Treatment Center, Zhejiang Chinese Medicine and Western Medicine Integrated Hospital, Hangzhou, Zhejiang, 310003, China
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Flores J, Cancino JC, Chavez-Galan L. Lipoarabinomannan as a Point-of-Care Assay for Diagnosis of Tuberculosis: How Far Are We to Use It? Front Microbiol 2021; 12:638047. [PMID: 33935997 PMCID: PMC8081860 DOI: 10.3389/fmicb.2021.638047] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Accepted: 03/22/2021] [Indexed: 12/13/2022] Open
Abstract
Tuberculosis (TB) is still a severe public health problem; the current diagnostic tests have limitations that delay treatment onset. Lipoarabinomannan (LAM) is a glycolipid that is a component of the cell wall of the bacillus Mycobacterium tuberculosis, the etiologic agent of TB. This glycolipid is excreted as a soluble form in urine. The World Health Organization has established that the design of new TB diagnostic methods is one of the priorities within the EndTB Strategy. LAM has been suggested as a biomarker to develop diagnostic tests based on its identification in urine, and it is one of the most prominent candidates to develop point-of-care diagnostic test because urine samples can be easily collected. Moreover, LAM can regulate the immune response in the host and can be found in the serum of TB patients, where it probably affects a wide variety of host cell populations, consequently influencing the quality of both innate and adaptive immune responses during TB infection. Here, we revised the evidence that supports that LAM could be used as a tool for the development of new point-of-care tests for TB diagnosis, and we discussed the mechanisms that could contribute to the low sensitivity of diagnostic testing.
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Affiliation(s)
- Julio Flores
- Laboratory of Integrative Immunology, Instituto Nacional de Enfermedades Respiratorias Ismael Cosio Villegas, Mexico City, Mexico.,Laboratory of Immunomicrobiology, Department of Microbiology, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Mexico City, Mexico
| | - Juan Carlos Cancino
- Laboratory of Immunomicrobiology, Department of Microbiology, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Mexico City, Mexico
| | - Leslie Chavez-Galan
- Laboratory of Integrative Immunology, Instituto Nacional de Enfermedades Respiratorias Ismael Cosio Villegas, Mexico City, Mexico
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Pooled analysis of the Xpert MTB/RIF assay for diagnosing tuberculous meningitis. Biosci Rep 2021; 40:221365. [PMID: 31778149 PMCID: PMC6946622 DOI: 10.1042/bsr20191312] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2019] [Revised: 07/05/2019] [Accepted: 11/06/2019] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND Tuberculous meningitis (TBM) is one of the most serious types of extrapulmonary tuberculosis. However, low sensitivity of culture of cerebrospinal fluid (CSF) increases the difficulty in clinical diagnosis, leading to diagnostic delay, and misdiagnosis. Xpert MTB/RIF assay is a rapid and simple method to detect tuberculosis. However, the efficacy of this technique in diagnosing TBM remains unclear. Therefore, a meta-analysis was conducted to evaluate the diagnostic efficacy of Xpert MTB/RIF for TBM, which may enhance the development of early diagnosis of TBM. METHODS Relevant studies in the PubMed, Embase, and Web of Science databases were retrieved using the keywords 'Xpert MTB/RIF', 'tuberculous meningitis (TBM)'. The pooled sensitivity, pooled specificity, positive likelihood ratio, negative likelihood ratio, diagnostic odds ratio, summary receiver operator characteristic curve, and area under the curve (AUC) of Xpert MTB/RIF were determined and analyzed. RESULTS A total of 162 studies were enrolled and only 14 met the criteria for meta-analysis. The overall pooled sensitivity of Xpert MTB/RIF was 63% [95% confidence interval (CI), 59-66%], while the overall pooled specificity was 98.1% (95% CI, 97.5-98.5%). The pooled values of positive likelihood ratio, negative likelihood ratio, and diagnostic odds ratio were 20.91% (12.71-52.82%), 0.40% (0.32-0.50%), and 71.49% (32.64-156.56%), respectively. The AUC was 0.76. CONCLUSIONS Xpert MTB/RIF exhibited high specificity in diagnosing TBM in CSF samples, but its sensitivity was relatively low. It is necessary to combine other high-sensitive detection methods for the early diagnosis of TBM. Moreover, the centrifugation of CSF samples was found to be beneficial in improving the sensitivity.
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Xpert MTB/RIF on pleural biopsy in suspected pleural TB: Does it add anything other than cost? Afr J Thorac Crit Care Med 2021; 27. [PMID: 34240038 PMCID: PMC8203050 DOI: 10.7196/ajtccm.2021.v27i1.136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
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Tomaz APDO, Raboni SM, Kussen GMB, da Silva Nogueira K, Lopes Ribeiro CE, Costa LMD. The Xpert® MTB/RIF diagnostic test for pulmonary and extrapulmonary tuberculosis in immunocompetent and immunocompromised patients: Benefits and experiences over 2 years in different clinical contexts. PLoS One 2021; 16:e0247185. [PMID: 33657113 PMCID: PMC7928506 DOI: 10.1371/journal.pone.0247185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Accepted: 02/02/2021] [Indexed: 11/19/2022] Open
Abstract
Xpert® MTB/RIF has been widely used for tuberculosis (TB) diagnosis in Brazil, since 2014. This prospective observational study aimed to evaluate the performance of Xpert in different contexts during a two-year period: (i) laboratory and clinical/epidemiological diagnosis; (ii) HIV-positive and -negative populations; (iii) type of specimens: pulmonary and extrapulmonary. Overall, 924 specimens from 743 patients were evaluated. The performance of the assays was evaluated considering culture (Lowenstein Jensen or LJ medium) results and composite reference standard (CRS) classification as gold standard. According to CRS evaluation, 219 cases (29.5%) were classified as positive cases, 157 (21.1%) as ‘possible TB’, and 367 (49.3%) as ‘not TB’. Based on culture, Xpert and AFB smear achieved a sensitivity of 96% and 62%, respectively, while based on CRS, the sensitivities of Xpert, AFB smear, and culture were 40.7%, 20%, and 25%, respectively. The pooled sensitivity and specificity of Xpert were 96% and 94%, respectively. Metric evaluations were similar between pulmonary and extrapulmonary samples against culture, whereas compared to CRS, the sensitivities were 44.6% and 29.3% for the pulmonary and extrapulmonary cases, respectively. The Xpert detected 42/69 (60.9%) patients with confirmed TB and negative culture on LJ medium, and 52/69 (75.4%) patients with negative AFB smear results. There was no significant difference in the diagnostic accuracy based on the types of specimens and population (positive- and negative-HIV). Molecular testing detected 13 cases of TB in culture-negative patients with severe immunosuppression. Resistance to rifampicin was detected in seven samples. Herein, Xpert showed improved detection of pulmonary and extrapulmonary TB cases, both among HIV-positive and -negative patients, even in cases with advanced immunosuppression, thereby performing better than multiple other diagnostic parameters.
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Affiliation(s)
- Ana Paula de Oliveira Tomaz
- Programa de Pós graduação em Biotecnologia Aplicada à Saúde da Criança e do Adolescente da Faculdades Pequeno Príncipe (FPP), Instituto de Pesquisa Pelé Pequeno Príncipe (IPPPP), Curitiba, Paraná, Brasil
- Complexo Hospital de Clínicas, Universidade Federal do Paraná (CHC-UFPR), Setor de Infectologia, Setor de Bacteriologia, Unidade de Laboratório de Análises Clínicas (ULAC) Curitiba, Paraná, Brasil
| | - Sonia Mara Raboni
- Complexo Hospital de Clínicas, Universidade Federal do Paraná (CHC-UFPR), Setor de Infectologia, Setor de Bacteriologia, Unidade de Laboratório de Análises Clínicas (ULAC) Curitiba, Paraná, Brasil
| | - Gislene Maria Botão Kussen
- Complexo Hospital de Clínicas, Universidade Federal do Paraná (CHC-UFPR), Setor de Infectologia, Setor de Bacteriologia, Unidade de Laboratório de Análises Clínicas (ULAC) Curitiba, Paraná, Brasil
| | - Keite da Silva Nogueira
- Programa de Pós graduação em Biotecnologia Aplicada à Saúde da Criança e do Adolescente da Faculdades Pequeno Príncipe (FPP), Instituto de Pesquisa Pelé Pequeno Príncipe (IPPPP), Curitiba, Paraná, Brasil
- Complexo Hospital de Clínicas, Universidade Federal do Paraná (CHC-UFPR), Setor de Infectologia, Setor de Bacteriologia, Unidade de Laboratório de Análises Clínicas (ULAC) Curitiba, Paraná, Brasil
| | - Clea Elisa Lopes Ribeiro
- Secretaria Municipal da Saúde, Setor Vigilância Epidemiológica de HIV/AIDS, Curitiba, Paraná, Brasil
| | - Libera Maria Dalla Costa
- Programa de Pós graduação em Biotecnologia Aplicada à Saúde da Criança e do Adolescente da Faculdades Pequeno Príncipe (FPP), Instituto de Pesquisa Pelé Pequeno Príncipe (IPPPP), Curitiba, Paraná, Brasil
- Complexo Hospital de Clínicas, Universidade Federal do Paraná (CHC-UFPR), Setor de Infectologia, Setor de Bacteriologia, Unidade de Laboratório de Análises Clínicas (ULAC) Curitiba, Paraná, Brasil
- * E-mail:
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Guan M, Zhang J, Jia Y, Teng Y, Cao X, Li Y. Primary bilateral tuberculous otitis media with peripheral facial paralysis: a case report and literature review. INTERNATIONAL JOURNAL OF CLINICAL AND EXPERIMENTAL PATHOLOGY 2021; 14:304-313. [PMID: 33786147 PMCID: PMC7994147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Accepted: 12/31/2020] [Indexed: 06/12/2023]
Abstract
Tuberculous otitis media (TOM) is a rare disease. This study presents our experience in the diagnosis and treatment of TOM. A 49-year-old female had repeated ear discharge, vertigo, and severe hearing loss for six years, and underwent mastoid surgery four times because she was misdiagnosed with chronic suppurative otitis media. The patient had left-sided facial paralysis for two weeks when she was admitted to our hospital and was managed with radical mastoidectomy and facial nerve decompression. After surgery, facial nerve function gradually improved from grade V to grade II, and the patient was diagnosed with an unusual primary bilateral TOM after tuberculosis smear culture, pathologic examination, and tuberculosis DNA testing by the PCR technique. After anti-tuberculosis therapy, the operative mastoid cavity in the patient was eventually epithelialized and dry. Therefore, this study suggests that, TOM should be actively excluded in patients with uncontrollable ear leakage, massive white granulation tissue and dead bone formation in the ear. Surgical decompression is recommended to prevent permanent facial paralysis, since opening the facial nerve sheath effectively relieves facial nerve compression and edema due to the TOM-induced persistent inflammation and granulation tissue formation.
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Affiliation(s)
- Ming Guan
- Department of Otolaryngology, Affiliated Hangzhou First People’s Hospital, Zhejiang University School of MedicineHangzhou 310006, Zhejiang, China
- Department of Otolaryngology, Hangzhou First People’s HospitalHangzhou 310006, Zhejiang, China
| | - Jie Zhang
- Department of Pediatrics, Hangzhou Children’s HospitalHangzhou 310000, Zhejiang, China
| | - Yuezhi Jia
- Department of Otolaryngology, Affiliated Hangzhou First People’s Hospital, Zhejiang University School of MedicineHangzhou 310006, Zhejiang, China
- Department of Otolaryngology, Hangzhou First People’s HospitalHangzhou 310006, Zhejiang, China
| | - Yaoshu Teng
- Department of Otolaryngology, Affiliated Hangzhou First People’s Hospital, Zhejiang University School of MedicineHangzhou 310006, Zhejiang, China
- Department of Otolaryngology, Hangzhou First People’s HospitalHangzhou 310006, Zhejiang, China
| | - Xiaolin Cao
- Department of Otolaryngology, Affiliated Hangzhou First People’s Hospital, Zhejiang University School of MedicineHangzhou 310006, Zhejiang, China
- Department of Otolaryngology, Hangzhou First People’s HospitalHangzhou 310006, Zhejiang, China
| | - Yong Li
- Department of Otolaryngology, Affiliated Hangzhou First People’s Hospital, Zhejiang University School of MedicineHangzhou 310006, Zhejiang, China
- Department of Otolaryngology, Hangzhou First People’s HospitalHangzhou 310006, Zhejiang, China
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Abstract
Tuberculosis (TB) remains a leading cause of morbidity and mortality among people living with HIV. HIV-associated TB disproportionally affects African countries, particularly vulnerable groups at risk for both TB and HIV. Currently available TB diagnostics perform poorly in people living with HIV; however, new diagnostics such as Xpert Ultra and lateral flow urine lipoarabinomannan assays can greatly facilitate diagnosis of TB in people living with HIV. TB preventive treatment has been underutilized despite its proven benefits independent of antiretroviral therapy (ART). Shorter regimens using rifapentine can support increased availability and scale-up. Mortality is high in people with HIV-associated TB, and timely initiation of ART is critical. Programs should provide decentralized and integrated TB and HIV care in settings with high burden of both diseases to improve access to services that diagnose TB and HIV as early as possible. The new prevention and diagnosis tools recently recommended by WHO offer an immense opportunity to advance our fight against HIV-associated TB. They should be made widely available and scaled up rapidly supported by adequate funding with robust monitoring of the uptake to advance global TB elimination.
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Affiliation(s)
- Yohhei Hamada
- Centre for International Cooperation and Global TB Information, 46635Research Institute of Tuberculosis, Japan Anti-Tuberculosis Association, Tokyo, Japan.,Institute for Global Health, 4919University College London, London, UK
| | - Haileyesus Getahun
- Department of Global Coordination and Partnership on Antimicrobial Resistance, 3489WHO, Geneva, Switzerland
| | - Birkneh Tilahun Tadesse
- Department of Global Coordination and Partnership on Antimicrobial Resistance, 3489WHO, Geneva, Switzerland
| | - Nathan Ford
- Department of Paediatrics, College of Medicine and Health Sciences, 128167Hawassa University, Hawassa, Ethiopia
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Goravey W, Ali GA, Petkar M, Ammar A, Eldean MS, Al Maslamani MA, Abdel Hadi H. Ancient foe spectra: Case series of Mycobacterium tuberculosis presentations. Clin Case Rep 2021; 9:714-717. [PMID: 33598231 PMCID: PMC7869353 DOI: 10.1002/ccr3.3616] [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: 10/07/2020] [Revised: 10/29/2020] [Accepted: 11/10/2020] [Indexed: 11/28/2022] Open
Abstract
Extrapulmonary tuberculosis frequently eludes assessment through atypical presentations and constitute diagnostic challenges. High degree of suspicion with aids of GeneXpert MTB/RIF can clinch the diagnosis and avoid unnecessary consequences.
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Affiliation(s)
- Wael Goravey
- Department of Infectious DiseasesCommunicable Diseases CentreDohaQatar
| | - Gawahir A. Ali
- Department of Infectious DiseasesCommunicable Diseases CentreDohaQatar
| | - Mahir Petkar
- Department of Laboratory Medicine and PathologyHamad Medical CorporationDohaQatar
| | - Adham Ammar
- Department of Laboratory Medicine and PathologyHamad Medical CorporationDohaQatar
| | | | | | - Hamad Abdel Hadi
- Department of Infectious DiseasesCommunicable Diseases CentreDohaQatar
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Cresswell FV, Davis AG, Sharma K, Basu Roy R, Ganiem AR, Kagimu E, Solomons R, Wilkinson RJ, Bahr NC, Thuong NTT. Recent Developments in Tuberculous Meningitis Pathogenesis and Diagnostics. Wellcome Open Res 2021; 4:164. [PMID: 33364436 PMCID: PMC7739117 DOI: 10.12688/wellcomeopenres.15506.3] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/15/2021] [Indexed: 12/13/2022] Open
Abstract
The pathogenesis of Tuberculous meningitis (TBM) is poorly understood, but contemporary molecular biology technologies have allowed for recent improvements in our understanding of TBM. For instance, neutrophils appear to play a significant role in the immunopathogenesis of TBM, and either a paucity or an excess of inflammation can be detrimental in TBM. Further, severity of HIV-associated immunosuppression is an important determinant of inflammatory response; patients with the advanced immunosuppression (CD4+ T-cell count of <150 cells/μL) having higher CSF neutrophils, greater CSF cytokine concentrations and higher mortality than those with CD4+ T-cell counts > 150 cells/μL. Host genetics may also influence outcomes with LT4AH genotype predicting inflammatory phenotype, steroid responsiveness and survival in Vietnamese adults with TBM. Whist in Indonesia, CSF tryptophan level was a predictor of survival, suggesting tryptophan metabolism may be important in TBM pathogenesis. These varying responses mean that we must consider whether a "one-size-fits-all" approach to anti-bacillary or immunomodulatory treatment in TBM is truly the best way forward. Of course, to allow for proper treatment, early and rapid diagnosis of TBM must occur. Diagnosis has always been a challenge but the field of TB diagnosis is evolving, with sensitivities of at least 70% now possible in less than two hours with GeneXpert MTB/Rif Ultra. In addition, advanced molecular techniques such as CRISPR-MTB and metagenomic next generation sequencing may hold promise for TBM diagnosis. Host-based biomarkers and signatures are being further evaluated in childhood and adult TBM as adjunctive biomarkers as even with improved molecular assays, cases are still missed. A better grasp of host and pathogen behaviour may lead to improved diagnostics, targeted immunotherapy, and possibly biomarker-based, patient-specific treatment regimens.
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Affiliation(s)
- Fiona V Cresswell
- Clinical Research Department, London School of Hygiene and Tropical Medicine, London, WC1E 7HT, UK
- Research Department, Infectious Diseases Institute, Kampala, PO Box 22418, Uganda
- MRC-UVRI-London School of Hygiene and Tropical Medicine Uganda Research Unit, Entebbe, Uganda
| | - Angharad G. Davis
- University College London, London, WC1E6BT, UK
- Francis Crick Institute, London, NW1 1AT, UK
- Department of Medicine, Institute of Infectious Diseases and Molecular Medicine, University of Cape Town, 7925, South Africa
| | - Kusum Sharma
- Department of Medical Microbiology, Post-graduate Department of Medical Education and Research, Chandigahr, India
| | - Robindra Basu Roy
- Clinical Research Department, London School of Hygiene and Tropical Medicine, London, WC1E 7HT, UK
| | - Ahmad Rizal Ganiem
- Department of Neurology, Hasan Sadikin Hospital, Faculty of Medicine. Universitas Padjadjaran, Bandung, Indonesia
| | - Enock Kagimu
- Research Department, Infectious Diseases Institute, Kampala, PO Box 22418, Uganda
| | - Regan Solomons
- Department of Paediatrics and Child Health, Faculty of Medicine and Health Sciences, Stellenbosch University, South Africa
| | - Robert J. Wilkinson
- Francis Crick Institute, London, NW1 1AT, UK
- Department of Medicine, Institute of Infectious Diseases and Molecular Medicine, University of Cape Town, 7925, South Africa
- Department of Infectious Diseases, Imperial College, London, W2 1PG, UK
| | - Nathan C Bahr
- Division of Infectious Diseases. Department of Medicine., University of Kansas, Kansas City, USA
| | | | - Tuberculous Meningitis International Research Consortium
- Clinical Research Department, London School of Hygiene and Tropical Medicine, London, WC1E 7HT, UK
- Research Department, Infectious Diseases Institute, Kampala, PO Box 22418, Uganda
- MRC-UVRI-London School of Hygiene and Tropical Medicine Uganda Research Unit, Entebbe, Uganda
- University College London, London, WC1E6BT, UK
- Francis Crick Institute, London, NW1 1AT, UK
- Department of Medicine, Institute of Infectious Diseases and Molecular Medicine, University of Cape Town, 7925, South Africa
- Department of Medical Microbiology, Post-graduate Department of Medical Education and Research, Chandigahr, India
- Department of Neurology, Hasan Sadikin Hospital, Faculty of Medicine. Universitas Padjadjaran, Bandung, Indonesia
- Department of Paediatrics and Child Health, Faculty of Medicine and Health Sciences, Stellenbosch University, South Africa
- Department of Infectious Diseases, Imperial College, London, W2 1PG, UK
- Division of Infectious Diseases. Department of Medicine., University of Kansas, Kansas City, USA
- Oxford University Clinical Research Unit, Ho Chi Minh City, Vietnam
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74
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Hoang LT, Jain P, Pillay TD, Tolosa-Wright M, Niazi U, Takwoingi Y, Halliday A, Berrocal-Almanza LC, Deeks JJ, Beverley P, Kon OM, Lalvani A. Transcriptomic signatures for diagnosing tuberculosis in clinical practice: a prospective, multicentre cohort study. THE LANCET. INFECTIOUS DISEASES 2021; 21:366-375. [PMID: 33508221 PMCID: PMC7907671 DOI: 10.1016/s1473-3099(20)30928-2] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 08/15/2020] [Accepted: 11/23/2020] [Indexed: 12/23/2022]
Abstract
Background Blood transcriptomic signatures for diagnosis of tuberculosis have shown promise in case-control studies, but none have been prospectively designed or validated in adults presenting with the full clinical spectrum of suspected tuberculosis, including extrapulmonary tuberculosis and common differential diagnoses that clinically resemble tuberculosis. We aimed to evaluate the diagnostic accuracy of transcriptomic signatures in patients presenting with clinically suspected tuberculosis in routine practice. Methods The Validation of New Technologies for Diagnostic Evaluation of Tuberculosis (VANTDET) study was nested within a prospective, multicentre cohort study in secondary care in England (IDEA 11/H0722/8). Patients (aged ≥16 years) suspected of having tuberculosis in the routine clinical inpatient and outpatient setting were recruited at ten National Health Service hospitals in England for IDEA and were included in VANTDET if they provided consent for genomic analysis. Patients had whole blood taken for microarray analysis to measure abundance of transcripts and were followed up for 6–12 months to determine final diagnoses on the basis of predefined diagnostic criteria. The diagnostic accuracy of six signatures derived from the cohort and three previously published transcriptomic signatures with potentially high diagnostic performance were assessed by calculating area under the receiver-operating characteristic curves (AUC-ROCs), sensitivities, and specificities. Findings Between Nov 25, 2011, and Dec 31, 2013, 1162 participants were enrolled. 628 participants (aged ≥16 years) were included in the analysis, of whom 212 (34%) had culture-confirmed tuberculosis, 89 (14%) had highly probable tuberculosis, and 327 (52%) had tuberculosis excluded. The novel signature with highest performance for identifying all active tuberculosis gave an AUC-ROC of 0·87 (95% CI 0·81–0·92), sensitivity of 77% (66–87), and specificity of 84% (74–91). The best-performing published signature gave an AUC-ROC of 0·83 (0·80–0·86), sensitivity of 78% (73–83), and specificity of 76% (70–80). For detecting highly probable tuberculosis, the best novel signature yielded results of 0·86 (0·71–0·95), 77% (56–94%), and 77% (57–95%). None of the relevant cohort-derived or previously published signatures achieved the WHO-defined targets of paired sensitivity and specificity for a non-sputum-based diagnostic test. Interpretation In a clinically representative cohort in routine practice in a low-incidence setting, transcriptomic signatures did not have adequate accuracy for diagnosis of tuberculosis, including in patients with highly probable tuberculosis where the unmet need is greatest. These findings suggest that transcriptomic signatures have little clinical utility for diagnostic assessment of suspected tuberculosis. Funding National Institute for Health Research.
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Affiliation(s)
- Long T Hoang
- Tuberculosis Research Centre, National Heart and Lung Institute, Imperial College London, London, UK
| | - Pooja Jain
- Tuberculosis Research Centre, National Heart and Lung Institute, Imperial College London, London, UK
| | - Timesh D Pillay
- Tuberculosis Research Centre, National Heart and Lung Institute, Imperial College London, London, UK
| | - Mica Tolosa-Wright
- Tuberculosis Research Centre, National Heart and Lung Institute, Imperial College London, London, UK
| | - Umar Niazi
- Guy's and St Thomas' National Health Service Foundation Trust and King's College London National Institute for Health Research Biomedical Research Centre Translational Bioinformatics Platform, Guy's Hospital, London, UK
| | - Yemisi Takwoingi
- Test Evaluation Research Group, Institute of Applied Health Research, University of Birmingham, Birmingham, UK; National Institute of Health Research Birmingham Biomedical Research Centre, University Hospitals Birmingham National Health Service Foundation Trust and University of Birmingham, Birmingham, UK
| | - Alice Halliday
- Bristol Children's Vaccine Centre, University of Bristol, UK
| | - Luis C Berrocal-Almanza
- Tuberculosis Research Centre, National Heart and Lung Institute, Imperial College London, London, UK
| | - Jonathan J Deeks
- Test Evaluation Research Group, Institute of Applied Health Research, University of Birmingham, Birmingham, UK; National Institute of Health Research Birmingham Biomedical Research Centre, University Hospitals Birmingham National Health Service Foundation Trust and University of Birmingham, Birmingham, UK
| | - Peter Beverley
- Tuberculosis Research Centre, National Heart and Lung Institute, Imperial College London, London, UK
| | - Onn Min Kon
- Tuberculosis Research Centre, National Heart and Lung Institute, Imperial College London, London, UK; Tuberculosis Service, Imperial College Healthcare National Health Service Trust, London, UK
| | - Ajit Lalvani
- Tuberculosis Research Centre, National Heart and Lung Institute, Imperial College London, London, UK.
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Kohli M, Schiller I, Dendukuri N, Yao M, Dheda K, Denkinger CM, Schumacher SG, Steingart KR. Xpert MTB/RIF Ultra and Xpert MTB/RIF assays for extrapulmonary tuberculosis and rifampicin resistance in adults. Cochrane Database Syst Rev 2021; 1:CD012768. [PMID: 33448348 PMCID: PMC8078545 DOI: 10.1002/14651858.cd012768.pub3] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND Xpert MTB/RIF Ultra (Xpert Ultra) and Xpert MTB/RIF are World Health Organization (WHO)-recommended rapid nucleic acid amplification tests (NAATs) widely used for simultaneous detection of Mycobacterium tuberculosis complex and rifampicin resistance in sputum. To extend our previous review on extrapulmonary tuberculosis (Kohli 2018), we performed this update to inform updated WHO policy (WHO Consolidated Guidelines (Module 3) 2020). OBJECTIVES To estimate diagnostic accuracy of Xpert Ultra and Xpert MTB/RIF for extrapulmonary tuberculosis and rifampicin resistance in adults with presumptive extrapulmonary tuberculosis. SEARCH METHODS Cochrane Infectious Diseases Group Specialized Register, MEDLINE, Embase, Science Citation Index, Web of Science, Latin American Caribbean Health Sciences Literature, Scopus, ClinicalTrials.gov, the WHO International Clinical Trials Registry Platform, the International Standard Randomized Controlled Trial Number Registry, and ProQuest, 2 August 2019 and 28 January 2020 (Xpert Ultra studies), without language restriction. SELECTION CRITERIA Cross-sectional and cohort studies using non-respiratory specimens. Forms of extrapulmonary tuberculosis: tuberculous meningitis and pleural, lymph node, bone or joint, genitourinary, peritoneal, pericardial, disseminated tuberculosis. Reference standards were culture and a study-defined composite reference standard (tuberculosis detection); phenotypic drug susceptibility testing and line probe assays (rifampicin resistance detection). DATA COLLECTION AND ANALYSIS Two review authors independently extracted data and assessed risk of bias and applicability using QUADAS-2. For tuberculosis detection, we performed separate analyses by specimen type and reference standard using the bivariate model to estimate pooled sensitivity and specificity with 95% credible intervals (CrIs). We applied a latent class meta-analysis model to three forms of extrapulmonary tuberculosis. We assessed certainty of evidence using GRADE. MAIN RESULTS 69 studies: 67 evaluated Xpert MTB/RIF and 11 evaluated Xpert Ultra, of which nine evaluated both tests. Most studies were conducted in China, India, South Africa, and Uganda. Overall, risk of bias was low for patient selection, index test, and flow and timing domains, and low (49%) or unclear (43%) for the reference standard domain. Applicability for the patient selection domain was unclear for most studies because we were unsure of the clinical settings. Cerebrospinal fluid Xpert Ultra (6 studies) Xpert Ultra pooled sensitivity and specificity (95% CrI) against culture were 89.4% (79.1 to 95.6) (89 participants; low-certainty evidence) and 91.2% (83.2 to 95.7) (386 participants; moderate-certainty evidence). Of 1000 people where 100 have tuberculous meningitis, 168 would be Xpert Ultra-positive: of these, 79 (47%) would not have tuberculosis (false-positives) and 832 would be Xpert Ultra-negative: of these, 11 (1%) would have tuberculosis (false-negatives). Xpert MTB/RIF (30 studies) Xpert MTB/RIF pooled sensitivity and specificity against culture were 71.1% (62.8 to 79.1) (571 participants; moderate-certainty evidence) and 96.9% (95.4 to 98.0) (2824 participants; high-certainty evidence). Of 1000 people where 100 have tuberculous meningitis, 99 would be Xpert MTB/RIF-positive: of these, 28 (28%) would not have tuberculosis; and 901 would be Xpert MTB/RIF-negative: of these, 29 (3%) would have tuberculosis. Pleural fluid Xpert Ultra (4 studies) Xpert Ultra pooled sensitivity and specificity against culture were 75.0% (58.0 to 86.4) (158 participants; very low-certainty evidence) and 87.0% (63.1 to 97.9) (240 participants; very low-certainty evidence). Of 1000 people where 100 have pleural tuberculosis, 192 would be Xpert Ultra-positive: of these, 117 (61%) would not have tuberculosis; and 808 would be Xpert Ultra-negative: of these, 25 (3%) would have tuberculosis. Xpert MTB/RIF (25 studies) Xpert MTB/RIF pooled sensitivity and specificity against culture were 49.5% (39.8 to 59.9) (644 participants; low-certainty evidence) and 98.9% (97.6 to 99.7) (2421 participants; high-certainty evidence). Of 1000 people where 100 have pleural tuberculosis, 60 would be Xpert MTB/RIF-positive: of these, 10 (17%) would not have tuberculosis; and 940 would be Xpert MTB/RIF-negative: of these, 50 (5%) would have tuberculosis. Lymph node aspirate Xpert Ultra (1 study) Xpert Ultra sensitivity and specificity (95% confidence interval) against composite reference standard were 70% (51 to 85) (30 participants; very low-certainty evidence) and 100% (92 to 100) (43 participants; low-certainty evidence). Of 1000 people where 100 have lymph node tuberculosis, 70 would be Xpert Ultra-positive and 0 (0%) would not have tuberculosis; 930 would be Xpert Ultra-negative and 30 (3%) would have tuberculosis. Xpert MTB/RIF (4 studies) Xpert MTB/RIF pooled sensitivity and specificity against composite reference standard were 81.6% (61.9 to 93.3) (377 participants; low-certainty evidence) and 96.4% (91.3 to 98.6) (302 participants; low-certainty evidence). Of 1000 people where 100 have lymph node tuberculosis, 118 would be Xpert MTB/RIF-positive and 37 (31%) would not have tuberculosis; 882 would be Xpert MTB/RIF-negative and 19 (2%) would have tuberculosis. In lymph node aspirate, Xpert MTB/RIF pooled specificity against culture was 86.2% (78.0 to 92.3), lower than that against a composite reference standard. Using the latent class model, Xpert MTB/RIF pooled specificity was 99.5% (99.1 to 99.7), similar to that observed with a composite reference standard. Rifampicin resistance Xpert Ultra (4 studies) Xpert Ultra pooled sensitivity and specificity were 100.0% (95.1 to 100.0), (24 participants; low-certainty evidence) and 100.0% (99.0 to 100.0) (105 participants; moderate-certainty evidence). Of 1000 people where 100 have rifampicin resistance, 100 would be Xpert Ultra-positive (resistant): of these, zero (0%) would not have rifampicin resistance; and 900 would be Xpert Ultra-negative (susceptible): of these, zero (0%) would have rifampicin resistance. Xpert MTB/RIF (19 studies) Xpert MTB/RIF pooled sensitivity and specificity were 96.5% (91.9 to 98.8) (148 participants; high-certainty evidence) and 99.1% (98.0 to 99.7) (822 participants; high-certainty evidence). Of 1000 people where 100 have rifampicin resistance, 105 would be Xpert MTB/RIF-positive (resistant): of these, 8 (8%) would not have rifampicin resistance; and 895 would be Xpert MTB/RIF-negative (susceptible): of these, 3 (0.3%) would have rifampicin resistance. AUTHORS' CONCLUSIONS Xpert Ultra and Xpert MTB/RIF may be helpful in diagnosing extrapulmonary tuberculosis. Sensitivity varies across different extrapulmonary specimens: while for most specimens specificity is high, the tests rarely yield a positive result for people without tuberculosis. For tuberculous meningitis, Xpert Ultra had higher sensitivity and lower specificity than Xpert MTB/RIF against culture. Xpert Ultra and Xpert MTB/RIF had similar sensitivity and specificity for rifampicin resistance. Future research should acknowledge the concern associated with culture as a reference standard in paucibacillary specimens and consider ways to address this limitation.
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MESH Headings
- Adult
- Antibiotics, Antitubercular/therapeutic use
- Bias
- Drug Resistance, Bacterial
- False Negative Reactions
- False Positive Reactions
- Humans
- Mycobacterium tuberculosis/drug effects
- Mycobacterium tuberculosis/isolation & purification
- Nucleic Acid Amplification Techniques/methods
- Nucleic Acid Amplification Techniques/statistics & numerical data
- Reagent Kits, Diagnostic
- Rifampin/therapeutic use
- Sensitivity and Specificity
- Tuberculosis/cerebrospinal fluid
- Tuberculosis/diagnosis
- Tuberculosis/drug therapy
- Tuberculosis, Lymph Node/cerebrospinal fluid
- Tuberculosis, Lymph Node/diagnosis
- Tuberculosis, Lymph Node/drug therapy
- Tuberculosis, Meningeal/cerebrospinal fluid
- Tuberculosis, Meningeal/diagnosis
- Tuberculosis, Meningeal/drug therapy
- Tuberculosis, Multidrug-Resistant/cerebrospinal fluid
- Tuberculosis, Multidrug-Resistant/diagnosis
- Tuberculosis, Multidrug-Resistant/drug therapy
- Tuberculosis, Pleural/cerebrospinal fluid
- Tuberculosis, Pleural/diagnosis
- Tuberculosis, Pleural/drug therapy
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Affiliation(s)
- Mikashmi Kohli
- Department of Epidemiology, Biostatistics and Occupational Health, McGill University, Montreal, Canada
| | - Ian Schiller
- Centre for Outcomes Research, McGill University Health Centre - Research Institute, Montreal, Canada
| | - Nandini Dendukuri
- Centre for Outcomes Research, McGill University Health Centre - Research Institute, Montreal, Canada
| | - Mandy Yao
- Centre for Outcomes Research, McGill University Health Centre - Research Institute, Montreal, Canada
| | - Keertan Dheda
- Centre for Lung Infection and Immunity Unit, Department of Medicine and UCT Lung Institute, University of Cape Town, Cape Town, South Africa
- Faculty of Infectious and Tropical Diseases, Department of Immunology and Infection, London School of Hygiene and Tropical Medicine, London, UK
| | - Claudia M Denkinger
- FIND, Geneva , Switzerland
- Division of Tropical Medicine, Centre for Infectious Diseases, University Hospital Heidelberg, Heidelberg, Germany
| | | | - Karen R Steingart
- Honorary Research Fellow, Department of Clinical Sciences, Liverpool School of Tropical Medicine, Liverpool, UK
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Mokaddas E, Ahmad S, Eldeen H. Performance Comparison of GeneXpert MTB/RIF and ProbeTec ET Tests for Rapid Molecular Diagnosis of Extrapulmonary Tuberculosis in a Low TB/MDR-TB Incidence Country. Med Princ Pract 2021; 30:277-284. [PMID: 33592621 PMCID: PMC8280443 DOI: 10.1159/000515254] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2020] [Accepted: 02/15/2021] [Indexed: 12/22/2022] Open
Abstract
OBJECTIVE This study evaluated the performance of GeneXpert MTB/RIF (Xpert) and ProbeTec ET (PTec-ET) assays in diagnosing extrapulmonary tuberculosis (EPTB) in Kuwait. MATERIALS AND METHODS We tested nonrespiratory clinical specimens (n = 3,995) collected from 3,995 patients suspected to have EPTB. These included cavitary fluids (n = 2,054), fine-needle aspirate (FNA)/pus/tissue biopsy (n = 1,461), urine (n = 302), cerebrospinal fluid (CSF, n = 118), and others (n = 60). All specimens were processed for acid-fast bacilli (AFB), culture in mycobacteria growth indicator tube 960 system, and nucleic acid detection by Xpert and PTec-ET according to manufacturer's instructions. RESULTS Of 3,995 specimens, 95 were AFB-positive, 403 were culture-positive, and an additional 86 samples had histopathology suggestive of TB. Using culture as reference, the sensitivity and specificity values were 88.33 and 97.3% for Xpert and 72.95 and 97.80% for PTec-ET, respectively. Although performance of both tests was comparable in AFB-positive samples, Xpert detected significantly more cases in culture-positive samples. Among culture-negative samples, Xpert detected 18 more cases including 16 with histopathological evidence of TB. Lowest positivity was detected for both tests in cavitary fluids. Xpert performed better than PTec-ET in culture-positive FNA/pus/tissue biopsy and CSF samples. CONCLUSIONS Although performance of both tests was suboptimal for AFB-negative/culture-positive samples, Xpert performed better than PTec-ET and also detected more cases of AFB-negative/culture-negative/histopathology-positive samples. PTec-ET was positive in 3, while Xpert was positive in all 6 culture-positive CSF specimens for rapid diagnosis of TB meningitis. Xpert was thus superior to PTec-ET or smear microscopy in rapid diagnosis of EPTB.
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Affiliation(s)
- Eiman Mokaddas
- Department of Microbiology, Faculty of Medicine, Kuwait University, Safat, Kuwait
- Kuwait National TB Control Laboratory, Shuwaikh, Kuwait
| | - Suhail Ahmad
- Department of Microbiology, Faculty of Medicine, Kuwait University, Safat, Kuwait
- *Correspondence to: Suhail Ahmad,
| | - Hanaa Eldeen
- Kuwait National TB Control Laboratory, Shuwaikh, Kuwait
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77
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Luo Y, Xue Y, Mao L, Lin Q, Tang G, Song H, Wang F, Sun Z. Diagnostic Value of T-SPOT.TB Assay for Tuberculous Peritonitis: A Meta-Analysis. Front Med (Lausanne) 2020; 7:585180. [PMID: 33425937 PMCID: PMC7785855 DOI: 10.3389/fmed.2020.585180] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Accepted: 11/26/2020] [Indexed: 12/27/2022] Open
Abstract
Background: Tuberculous peritonitis (TP) is a common form of abdominal tuberculosis (TB). Diagnosing TP remains challenging in clinical practice. The aim of the present meta-analysis was to evaluate the diagnostic accuracy of peripheral blood (PB) T-SPOT and peritoneal fluid (PF) T-SPOT for diagnosing TP. Methods: PubMed, EmBase, Cochrane, Scopus, Google scholar, China national knowledge internet, and Wan-Fang databases were searched for relevant articles from August 1, 2005 to July 5, 2020. Statistical analysis was performed using Stata, Revman, and Meta-Disc software. Diagnostic parameters including pooled sensitivity, specificity, positive likelihood ratio (PLR), negative likelihood ratio (NLR), and diagnostic odds ratio (DOR) were determined. Summary receiver operating characteristic curve was used to determine the area under the curve (AUC). Results: Twelve studies were eligible and included in the meta-analysis. The analysis showed that the pooled sensitivity and specificity of PB T-SPOT in diagnosing TP were 0.91 (95% CI, 0.88–0.94) and 0.78 (95% CI, 0.73–0.81), respectively, while the pooled PLR, NLR, and DOR were 4.05 (95% CI, 2.73–6.01), 0.13 (95% CI, 0.07–0.23), and 37.8 (95% CI, 15.04–94.98), respectively. On the other hand, the summary estimates of sensitivity, specificity, PLR, NLR, and DOR of PF T-SPOT for TP diagnosis were 0.90 (95% CI, 0.85–0.94), 0.78 (95% CI, 0.72–0.83), 6.35 (95% CI, 2.67–15.07), 0.14 (95% CI, 0.09–0.21), and 58.22 (95% CI, 28.76–117.83), respectively. Furthermore, the AUC of PB T-SPOT and PF T-SPOT for TP diagnosis were 0.91 and 0.94, respectively. Conclusions: Our results indicate that both PB T-SPOT and PF T-SPOT can be served as sensitive approaches for the diagnosis of TP. However, the unsatisfactory specificities of these two methods limit their application as rule-in tests for TP diagnosis. Furthermore, the standardization of the operating procedure of PF T-SPOT is further needed.
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Affiliation(s)
- Ying Luo
- Department of Laboratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Ying Xue
- Department of Immunology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Liyan Mao
- Department of Laboratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Qun Lin
- Department of Laboratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Guoxing Tang
- Department of Laboratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Huijuan Song
- Department of Laboratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Feng Wang
- Department of Laboratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Ziyong Sun
- Department of Laboratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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78
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Yu G, Zhao W, Shen Y, Zhu P, Zheng H. Metagenomic next generation sequencing for the diagnosis of tuberculosis meningitis: A systematic review and meta-analysis. PLoS One 2020; 15:e0243161. [PMID: 33259541 PMCID: PMC7707562 DOI: 10.1371/journal.pone.0243161] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Accepted: 11/16/2020] [Indexed: 12/13/2022] Open
Abstract
Background Tuberculous meningitis (TBM) is a severe form of extrapulmonary tuberculosis and its early diagnosis is very difficult leading to present with severe disability or die. The current study aimed to assess the accuracy of metagenomic next generation sequencing (mNGS) for TBM, and to identify a new test for the early diagnosis of TBM. Methods We searched for articles published in Embase, PubMed, Cochrane Library, China National Knowledge Infrastructure, and Wanfang Data up to June 30, 2020 for studies that assessed the efficacy of mNGS for the diagnosis of TBM. Then, the accuracy between mNGS and a composite reference standard (CRS) in these articles was compared using the meta-analysis approach. Results Four independent studies with 342 samples comparing mNGS and a CRS were included in this study. The sensitivity of mNGS for TBM diagnosis ranged from 27% to 84%. The combined sensitivity of mNGS was 61%, and the I2 value was 92%. Moreover, the specificity of mNGS for TBM diagnosis ranged from 96% to 100%. The combined specificity of mNGS was 98%, and the I2 value was 74%. The heterogeneity between studies in terms of sensitivity and specificity was significant. The area under the curve (AUC) of the summary receiver operating characteristic curve (SROC) of mNGS for TBM was 0.98. Conclusions The sensitivity of mNGS for TBM diagnosis was moderate. Furthermore, the specificity was extremely high, and the AUC of the SROC indicated a very good diagnostic efficacy. mNGS could be used as an early diagnostic method for TBM, however, the results should be treated with caution for the heterogeneity between studies was extremely significant. Systematic review registration INPLASY202070100.
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Affiliation(s)
- Guocan Yu
- Zhejiang Tuberculosis Diagnosis and Treatment Center, Zhejiang Chinese Medicine and Western Medicine Integrated Hospital, Hangzhou, Zhejiang, China
| | - Wuchen Zhao
- Zhejiang Tuberculosis Diagnosis and Treatment Center, Zhejiang Chinese Medicine and Western Medicine Integrated Hospital, Hangzhou, Zhejiang, China
| | - Yanqin Shen
- Zhejiang Tuberculosis Diagnosis and Treatment Center, Zhejiang Chinese Medicine and Western Medicine Integrated Hospital, Hangzhou, Zhejiang, China
| | - Pengfei Zhu
- Zhejiang Tuberculosis Diagnosis and Treatment Center, Zhejiang Chinese Medicine and Western Medicine Integrated Hospital, Hangzhou, Zhejiang, China
| | - Hong Zheng
- Zhejiang Tuberculosis Diagnosis and Treatment Center, Zhejiang Chinese Medicine and Western Medicine Integrated Hospital, Hangzhou, Zhejiang, China
- * E-mail:
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79
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Hernandez AV, de Laurentis L, Souza I, Pessanha M, Thota P, Roman YM, Barboza-Meca J, Boulware DR, Vidal JE. Diagnostic accuracy of Xpert MTB/RIF for tuberculous meningitis: systematic review and meta-analysis. Trop Med Int Health 2020; 26:122-132. [PMID: 33164243 DOI: 10.1111/tmi.13525] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
OBJECTIVE This systematic review evaluated the diagnostic accuracy of Xpert MTB/RIF to detect tuberculous meningitis (TBM). METHODS PubMed and five other databases were systematically searched through March 2019. All studies evaluating diagnostic accuracy of Xpert MTB/RIF on cerebrospinal fluid (CSF) samples were included. Reference standards were definitive or definite plus probable TBM. The quality of studies was assessed by the QUADAS-2 tool. We performed bivariate random-effects meta-analysis and calculated summary diagnostic statistics. RESULTS We identified 30 studies (n = 3972 participants), including 5 cohort studies and 25 cross-sectional studies. Reference standards were definite TB (n = 28 studies) or definite plus probable TBM (n = 6 studies). The pooled Xpert MTB/RIF sensitivity was 85% (95% CI, 70-93%), and specificity was 98% (95% CI, 97-99%) with a negative likelihood ratio of 0.15 (95% CI, 0.04-0.27) for definite TBM. For probable TBM cases, pooled sensitivity was 81% (95% CI, 66-90%), and specificity was 99% (95% CI, 97-99%). For both reference standard types, meta-analyses showed a C-statistic area under the curve of 0.98. The QUADAS-2 tool revealed low risk of bias as well as low concerns regarding applicability. Methodological heterogeneity was high among studies. CONCLUSIONS Xpert MTB/RIF showed high accuracy for TBM diagnosis, but a negative Xpert MTB/RIF test does not rule out TBM. Repeat Xpert testing may be necessary. In clinical practice, Xpert MTB/RIF adds speed and sensitivity when compared to classic TBM diagnostic methods or previous commercial nucleic acid amplification techniques. More studies and better strategies for rapidly confirming a diagnosis of TBM in children are urgently needed.
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Affiliation(s)
- Adrian V Hernandez
- University of Connecticut/Hartford Hospital Evidence-based Practice Center, Hartford, CT, USA.,Vicerrectorado de Investigación, Universidad San Ignacio de Loyola (USIL), Lima, Peru
| | - Laryssa de Laurentis
- Department of Infectious Diseases, Instituto de Infectologia Emílio Ribas, São Paulo, Brazil
| | - Isadora Souza
- Department of Infectious Diseases, Instituto de Infectologia Emílio Ribas, São Paulo, Brazil
| | - Marcelo Pessanha
- Department of Infectious Diseases, Instituto de Infectologia Emílio Ribas, São Paulo, Brazil
| | | | - Yuani M Roman
- University of Connecticut/Hartford Hospital Evidence-based Practice Center, Hartford, CT, USA
| | - Joshuan Barboza-Meca
- Vicerrectorado de Investigación, Universidad San Ignacio de Loyola (USIL), Lima, Peru
| | - David R Boulware
- Department of Medcine, University of Minnesota, Minneapolis, MN, USA
| | - Jose E Vidal
- Department of Neurology, Instituto de Infectologia Emílio Ribas, São Paulo, Brazil.,Department of Infectious Diseases, Hospital das Clínicas, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
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80
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Li C, Liu C, Sun B, Zhang W, Wang Y, Sun J, Ma F, Chen Y. Performance of Xpert® MTB/RIF in diagnosing tuberculous pleuritis using thoracoscopic pleural biopsy. BMC Infect Dis 2020; 20:840. [PMID: 33183269 PMCID: PMC7663888 DOI: 10.1186/s12879-020-05578-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Accepted: 11/03/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Etiological diagnosis of tuberculous pleuritis is challenging, owing to a paucity of Mycobacterium tuberculosis (MTB) in the affected region. Moreover, currently available methods, such as the detection of acid-fast bacilli and microbiological culture, are not always conducive to timely diagnosis and treatment. In this study, we evaluated the performance of Xpert® MTB/RIF assay (hereinafter referred to as "Xpert") in detecting MTB in difficult-to-diagnose patients using suspensions of pleural biopsy tissue specimens obtained under direct thoracoscopic guidance. METHODS One hundred and sixty patients with an unexplained pleural effusion were included from the Shenyang Tenth People's Hospital and Shenyang Chest Hospital, China, between 2017 and 2018. The included patients underwent thoracoscopy under local anesthesia, with an intercostal incision of approximately 1.0 cm for biopsy. The biopsy specimens were used for pathological and etiological examinations. The Xpert test was evaluated for its sensitivity and specificity, as well as positive and negative predictive values (PPV and NPV, respectively), against data obtained using standards: the BACTEC™ MGIT™ 960 liquid culture system and a composite reference standard (CRS). RESULTS The sensitivity and specificity of Xpert were 68.8 and 64.6%, respectively, against the MGIT 960 culture data. The PPV and NPV of Xpert were 56.4 and 75.6%, respectively. The sensitivity of Xpert was 69.0% against the CRS data, which was significantly higher than that of MGIT 960 culture (56.6%). The PPV and NPV of Xpert against the CRS data were 100.0 and 57.3%, respectively. CONCLUSIONS Xpert is a good rule-in test but has limited value as a rule-out test for the diagnosis of tuberculosis pleuritis.
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Affiliation(s)
- Chengjun Li
- Department of Pleurisy, Shenyang Tenth People's Hospital and Shenyang Chest Hospital, Shenyang, Liaoning Province, 110044, People's Republic of China
| | - Chang Liu
- Department of Thoracic Surgery, Shenyang Tenth People's Hospital and Shenyang Chest Hospital, Shenyang, Liaoning Province, 110044, People's Republic of China
| | - Bingqi Sun
- Department of Tuberculosis Laboratory, Shenyang Tenth People's Hospital and Shenyang Chest Hospital, Shenyang, Liaoning Province, 110044, People's Republic of China
| | - Wei Zhang
- Department of Pleurisy, Shenyang Tenth People's Hospital and Shenyang Chest Hospital, Shenyang, Liaoning Province, 110044, People's Republic of China
| | - Yang Wang
- Department of Pleurisy, Shenyang Tenth People's Hospital and Shenyang Chest Hospital, Shenyang, Liaoning Province, 110044, People's Republic of China
| | - Jiao Sun
- Department of Tuberculosis Laboratory, Shenyang Tenth People's Hospital and Shenyang Chest Hospital, Shenyang, Liaoning Province, 110044, People's Republic of China
| | - Fang Ma
- Department of Pleurisy, Shenyang Tenth People's Hospital and Shenyang Chest Hospital, Shenyang, Liaoning Province, 110044, People's Republic of China
| | - Yu Chen
- Department of Tuberculosis, Shenyang Tenth People's Hospital and Shenyang Chest Hospital, Shenyang, Liaoning Province, 110044, People's Republic of China.
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81
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Quinn CM, Poplin V, Kasibante J, Yuquimpo K, Gakuru J, Cresswell FV, Bahr NC. Tuberculosis IRIS: Pathogenesis, Presentation, and Management across the Spectrum of Disease. Life (Basel) 2020; 10:E262. [PMID: 33138069 PMCID: PMC7693460 DOI: 10.3390/life10110262] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Revised: 10/13/2020] [Accepted: 10/21/2020] [Indexed: 12/14/2022] Open
Abstract
Antiretroviral therapy (ART), while essential in combatting tuberculosis (TB) and HIV coinfection, is often complicated by the TB-associated immune reconstitution inflammatory syndrome (TB-IRIS). Depending on the TB disease site and treatment status at ART initiation, this immune-mediated worsening of TB pathology can take the form of paradoxical TB-IRIS, unmasking TB-IRIS, or CNS TB-IRIS. Each form of TB-IRIS has unique implications for diagnosis and treatment. Recently published studies have emphasized the importance of neutrophils and T cell subtypes in TB-IRIS pathogenesis, alongside the recognized role of CD4 T cells and macrophages. Research has also refined our prognostic understanding, revealing how the disease can impact lung function. While corticosteroids remain the only trial-supported therapy for prevention and management of TB-IRIS, increasing interest has been given to biologic therapies directly targeting the immune pathology. TB-IRIS, especially its unmasking form, remains incompletely described and more data is needed to validate biomarkers for diagnosis. Management strategies remain suboptimal, especially in the highly morbid central nervous system (CNS) form of the disease, and further trials are necessary to refine treatment. In this review we will summarize the current understanding of the immunopathogenesis, the presentation of TB-IRIS and the evidence for management recommendations.
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Affiliation(s)
- Carson M. Quinn
- School of Medicine, University of California, San Francisco, CA 94143, USA
- Infectious Diseases Institute, College of Health Sciences, Makerere University, Kampala, Uganda; (J.K.); (J.G.); (F.V.C.)
| | - Victoria Poplin
- Division of Infectious Diseases, Department of Medicine, University of Kansas, Kansas City, KS 66045, USA; (V.P.); (N.C.B.)
| | - John Kasibante
- Infectious Diseases Institute, College of Health Sciences, Makerere University, Kampala, Uganda; (J.K.); (J.G.); (F.V.C.)
| | - Kyle Yuquimpo
- Department of Medicine, University of Kansas, Kansas City, KS 66045, USA;
| | - Jane Gakuru
- Infectious Diseases Institute, College of Health Sciences, Makerere University, Kampala, Uganda; (J.K.); (J.G.); (F.V.C.)
| | - Fiona V. Cresswell
- Infectious Diseases Institute, College of Health Sciences, Makerere University, Kampala, Uganda; (J.K.); (J.G.); (F.V.C.)
- Clinical Research Department, London School of Hygiene and Tropical Medicine, London WC1E 7HT, UK
- Medical Research Council, Uganda Virus Research Unit, London School of Hygiene and Tropical Medicine Uganda Research Unit, Entebbe, Uganda
| | - Nathan C. Bahr
- Division of Infectious Diseases, Department of Medicine, University of Kansas, Kansas City, KS 66045, USA; (V.P.); (N.C.B.)
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82
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Portelli S, Myung Y, Furnham N, Vedithi SC, Pires DEV, Ascher DB. Prediction of rifampicin resistance beyond the RRDR using structure-based machine learning approaches. Sci Rep 2020; 10:18120. [PMID: 33093532 PMCID: PMC7581776 DOI: 10.1038/s41598-020-74648-y] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2020] [Accepted: 09/21/2020] [Indexed: 01/23/2023] Open
Abstract
Rifampicin resistance is a major therapeutic challenge, particularly in tuberculosis, leprosy, P. aeruginosa and S. aureus infections, where it develops via missense mutations in gene rpoB. Previously we have highlighted that these mutations reduce protein affinities within the RNA polymerase complex, subsequently reducing nucleic acid affinity. Here, we have used these insights to develop a computational rifampicin resistance predictor capable of identifying resistant mutations even outside the well-defined rifampicin resistance determining region (RRDR), using clinical M. tuberculosis sequencing information. Our tool successfully identified up to 90.9% of M. tuberculosis rpoB variants correctly, with sensitivity of 92.2%, specificity of 83.6% and MCC of 0.69, outperforming the current gold-standard GeneXpert-MTB/RIF. We show our model can be translated to other clinically relevant organisms: M. leprae, P. aeruginosa and S. aureus, despite weak sequence identity. Our method was implemented as an interactive tool, SUSPECT-RIF (StrUctural Susceptibility PrEdiCTion for RIFampicin), freely available at https://biosig.unimelb.edu.au/suspect_rif/ .
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Affiliation(s)
- Stephanie Portelli
- Department of Biochemistry and Molecular Biology, Bio21 Institute, University of Melbourne, Victoria, 3010, Australia
- Computational Biology and Clinical Informatics, Baker Heart and Diabetes Institute, Melbourne, 3004, VIC, Australia
| | - Yoochan Myung
- Department of Biochemistry and Molecular Biology, Bio21 Institute, University of Melbourne, Victoria, 3010, Australia
- Computational Biology and Clinical Informatics, Baker Heart and Diabetes Institute, Melbourne, 3004, VIC, Australia
| | - Nicholas Furnham
- Department of Infection Biology, London School of Hygiene and Tropical Medicine, Keppel Street, London, WC1E 7HT, UK
| | | | - Douglas E V Pires
- Computational Biology and Clinical Informatics, Baker Heart and Diabetes Institute, Melbourne, 3004, VIC, Australia
- School of Computing and Information Systems, University of Melbourne, Victoria, 3010, Australia
| | - David B Ascher
- Department of Biochemistry and Molecular Biology, Bio21 Institute, University of Melbourne, Victoria, 3010, Australia.
- Computational Biology and Clinical Informatics, Baker Heart and Diabetes Institute, Melbourne, 3004, VIC, Australia.
- Department of Biochemistry, University of Cambridge, Cambridge, UK.
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83
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Aurilio RB, Marsili VV, Malaquias TDSS, Kritski AL, Sant'Anna CC. The use of Gene-Xpert MTB RIF in the diagnosis of extrapulmonary tuberculosis in childhood and adolescence. Rev Soc Bras Med Trop 2020; 53:e20200104. [PMID: 33027414 PMCID: PMC7534970 DOI: 10.1590/0037-8682-0104-2020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Accepted: 05/29/2020] [Indexed: 11/22/2022] Open
Abstract
INTRODUCTION Gene-Xpert MTB RIF (Xpert) is based on nucleic acid amplification by real-time polymerase chain reaction, which allows for the identification of Mycobacterium tuberculosis and rifampin resistance. We describe the use of Xpert for extrapulmonary tuberculosis (EPTB) in children and adolescents. METHODS A case series of two reference centers in Rio de Janeiro from 2014-2019. RESULTS The final diagnosis of EPTB was established in 11/36 (31%) patients, with five cases detectable by Xpert. For lymph node evaluation (9/11), diagnosis by Xpert occurred in 5/9 patients, all with caseous aspects. CONCLUSIONS Xpert can facilitate the rapid diagnosis of lymph node tuberculosis.
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Affiliation(s)
- Rafaela Baroni Aurilio
- Instituto de Pediatria e Puericultura Martagão Gesteira, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brasil
| | - Vivian Vidal Marsili
- Instituto de Pediatria e Puericultura Martagão Gesteira, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brasil
| | | | - Afrânio Lineu Kritski
- Programa Acadêmico de Tuberculose, Instituto de Doenças do Tórax, Faculdade de Medicina, Hospital Universitário Clementino Fraga Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brasil
| | - Clemax Couto Sant'Anna
- Departamento de Pediatria, Faculdade de Medicina, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brasil
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84
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Comparison of the CapitalBio™Mycobacterium RT-PCR detection test and Xpert MTB/RIF assay for diagnosis of renal tuberculosis. Eur J Clin Microbiol Infect Dis 2020; 40:559-563. [PMID: 32990820 DOI: 10.1007/s10096-020-04052-x] [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: 08/04/2020] [Accepted: 09/24/2020] [Indexed: 10/23/2022]
Abstract
The purpose of this study is to compare the efficiency difference between CapitalBio™Mycobacterium real-time polymerase chain reaction (RT-PCR) detection test and Xpert MTB/RIF assay for the diagnosis of renal tuberculosis (TB). We analyzed 117 samples collected between July 1, 2018, and October 31, 2019, from patients with suspected renal TB to determine the sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV), and area under the curve (AUC) of the CapitalBio™ Mycobacterium RT-PCR detection test for renal TB and to evaluate its diagnostic accuracy compared with Xpert MTB/RIF assay. Five cases were excluded from this study because of incomplete data. Taking clinical diagnosis as the gold standard, for the Xpert MTB/RIF assay, the sensitivity was 87.95% (78.96-94.07%), specificity 96.55% (82.24-99.91%), PPV 98.65% (92.70-99.97%), NPV 73.68% (56.90-86.60%), and AUC 0.92 (0.86-0.96). For the CapitalBio™Mycobacterium RT-PCR detection test, the overall sensitivity was 84.34% (74.71-91.39%), specificity 93.10% (77.23-99.15%), PPV 97.22% (90.32-99.66%), NPV 67.50% (50.87-81.43%), and AUC 0.89(0.81-0.94). The diagnostic efficiency of the CapitalBio™Mycobacterium RT-PCR detection test was similar to that of the Xpert MTB/RIF assay in patients with renal TB. Hence, the CapitalBio™Mycobacterium RT-PCR detection test presents a valuable alternative for the diagnosis of renal TB.
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85
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Park M, Kon OM. Use of Xpert MTB/RIF and Xpert Ultra in extrapulmonary tuberculosis. Expert Rev Anti Infect Ther 2020; 19:65-77. [PMID: 32806986 DOI: 10.1080/14787210.2020.1810565] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
INTRODUCTION Tuberculosis (TB) remains a major global health burden. There still remains a large gap between the notified and estimated incident cases. Extrapulmonary (EP) TB represents 15% of all TB cases and the diagnosis is more challenging due to the paucity of the organism. Smear microscopy is often insensitive and culture methods are prolonged. With the introduction of Xpert MTB/RIF and more recently Xpert Ultra, this has changed TB diagnostics by providing a rapid accessible platform to diagnose TB and identify rifampicin resistance within 2 h. AREAS COVERED The diagnostic accuracy and the clinical role of Xpert MTB/RIF and Xpert Ultra in the different forms of EPTB. EXPERT OPINION Whilst significant advances have been made in TB diagnostics, there is still a need to optimize the diagnostic yield of Xpert MTB/RIF and Xpert Ultra in EPTB samples. Research is needed to facilitate standardization and optimal preparation of samples as well as understanding the role of Xpert MTB/RIF and Xpert Ultra in different burden settings. Alongside the current GeneXpert platform, the launch of rapid second-line drug resistance polymerase chain reactions and whole genome sequencing may help tackle the global health burden with a more comprehensive diagnostic approach and appropriate treatment.
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Affiliation(s)
- Mirae Park
- Imperial College Healthcare NHS Trust, St Mary's Hospital , London, UK.,National Heart and Lung Institute, Imperial College London , London, UK
| | - Onn Min Kon
- Imperial College Healthcare NHS Trust, St Mary's Hospital , London, UK.,National Heart and Lung Institute, Imperial College London , London, UK
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86
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Abstract
Molecular tests for tuberculosis (TB) have the potential to help reach the three million people with TB who are undiagnosed or not reported each year and to improve the quality of care TB patients receive by providing accurate, quick results, including rapid drug-susceptibility testing. The World Health Organization (WHO) has recommended the use of molecular nucleic acid amplification tests (NAATs) tests for TB detection instead of smear microscopy, as they are able to detect TB more accurately, particularly in patients with paucibacillary disease and in people living with HIV. Importantly, some of these WHO-endorsed tests can detect mycobacterial gene mutations associated with anti-TB drug resistance, allowing clinicians to tailor effective TB treatment. Currently, a wide array of molecular tests for TB detection is being developed and evaluated, and while some tests are intended for reference laboratory use, others are being aimed at the point-of-care and peripheral health care settings. Notably, there is an emergence of molecular tests designed, manufactured, and rolled out in countries with high TB burden, of which some are explicitly aimed for near-patient placement. These developments should increase access to molecular TB testing for larger patient populations. With respect to drug susceptibility testing, NAATs and next-generation sequencing can provide results substantially faster than traditional phenotypic culture. Here, we review recent advances and developments in molecular tests for detecting TB as well as anti-TB drug resistance.
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87
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Luo Y, Xue Y, Guo X, Lin Q, Mao L, Tang G, Song H, Wang F, Sun Z. Diagnostic Accuracy of T-SPOT.TB Assay for Tuberculous Meningitis: An Updated Meta-Analysis. Front Neurol 2020; 11:866. [PMID: 33013621 PMCID: PMC7494808 DOI: 10.3389/fneur.2020.00866] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Accepted: 07/07/2020] [Indexed: 12/12/2022] Open
Abstract
Background: The role of T-SPOT.TB (T-SPOT) assay for tuberculous meningitis (TBM) diagnosis has not been fully assessed. Here, we conducted an updated meta-analysis to evaluate the diagnostic accuracy of peripheral blood (PB) T-SPOT and cerebrospinal fluid (CSF) T-SPOT for diagnosing TBM. Methods: Relevant studies in the PubMed database, EmBase database, Cochrane database, Scopus database, Google Scholar, China National Knowledge Internet, and Wan-Fang database were retrieved from August 1, 2005, to June 22, 2020. Statistical analysis was performed using Stata, Revman, and Meta-Disc software. The pooled sensitivity, specificity, positive likelihood ratio (PLR), negative likelihood ratio (NLR), diagnostic odds ratio (DOR), summary receiver operating characteristic curves, and the area under the curve were determined and analyzed. Results: A total of 27 studies were eligible for inclusion within the meta-analysis. The pooled sensitivity and specificity of PB T-SPOT for TBM diagnosis were 0.78 (95% CI, 0.76-0.81) and 0.68 (95% CI, 0.66-0.71), respectively, whereas the pooled PLR, NLR, and DOR were 2.80 (95% CI, 2.29-3.42), 0.32 (95% CI, 0.27-0.38), and 10.08 (95% CI, 7.21-14.08), respectively. On the other hand, the pooled sensitivity and specificity of CSF T-SPOT on diagnosing TBM were 0.76 (95% CI, 0.72-0.80) and 0.88 (95% CI, 0.85-0.90), respectively, whereas the pooled PLR, NLR, and DOR were 5.92 (95% CI, 4.25-8.25), 0.28 (95% CI, 0.21-0.39), and 29.05 (95% CI, 16.40-51.45), respectively. The area under the summary receiver operating characteristic curve values of PB T-SPOT and CSF T-SPOT for TBM diagnosis were 0.83 (95% CI, 0.80-0.86) and 0.92 (95% CI, 0.89-0.94), respectively. Conclusions: CSF T-SPOT showed a higher specificity compared with PB T-SPOT for diagnosing TBM. Both two T-SPOT assays have considerable potential in improving the diagnosis of TBM. Furthermore, the standardization of the operating procedure is further needed when performing CSF T-SPOT.
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Affiliation(s)
- Ying Luo
- Department of Laboratory Medicine, Tongji Medical College, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Ying Xue
- Department of Clinical Immunology, Tongji Medical College, Tongji Hospital, Huazhong University of Sciences and Technology, Wuhan, China
| | - Xueyun Guo
- Department of Dermatology, Tongji Medical College, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Qun Lin
- Department of Laboratory Medicine, Tongji Medical College, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Liyan Mao
- Department of Laboratory Medicine, Tongji Medical College, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Guoxing Tang
- Department of Laboratory Medicine, Tongji Medical College, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Huijuan Song
- Department of Laboratory Medicine, Tongji Medical College, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Feng Wang
- Department of Laboratory Medicine, Tongji Medical College, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Ziyong Sun
- Department of Laboratory Medicine, Tongji Medical College, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
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Kay AW, González Fernández L, Takwoingi Y, Eisenhut M, Detjen AK, Steingart KR, Mandalakas AM. Xpert MTB/RIF and Xpert MTB/RIF Ultra assays for active tuberculosis and rifampicin resistance in children. Cochrane Database Syst Rev 2020; 8:CD013359. [PMID: 32853411 PMCID: PMC8078611 DOI: 10.1002/14651858.cd013359.pub2] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
BACKGROUND Every year, at least one million children become ill with tuberculosis and around 200,000 children die. Xpert MTB/RIF and Xpert Ultra are World Health Organization (WHO)-recommended rapid molecular tests that simultaneously detect tuberculosis and rifampicin resistance in adults and children with signs and symptoms of tuberculosis, at lower health system levels. To inform updated WHO guidelines on molecular assays, we performed a systematic review on the diagnostic accuracy of these tests in children presumed to have active tuberculosis. OBJECTIVES Primary objectives • To determine the diagnostic accuracy of Xpert MTB/RIF and Xpert Ultra for (a) pulmonary tuberculosis in children presumed to have tuberculosis; (b) tuberculous meningitis in children presumed to have tuberculosis; (c) lymph node tuberculosis in children presumed to have tuberculosis; and (d) rifampicin resistance in children presumed to have tuberculosis - For tuberculosis detection, index tests were used as the initial test, replacing standard practice (i.e. smear microscopy or culture) - For detection of rifampicin resistance, index tests replaced culture-based drug susceptibility testing as the initial test Secondary objectives • To compare the accuracy of Xpert MTB/RIF and Xpert Ultra for each of the four target conditions • To investigate potential sources of heterogeneity in accuracy estimates - For tuberculosis detection, we considered age, disease severity, smear-test status, HIV status, clinical setting, specimen type, high tuberculosis burden, and high tuberculosis/HIV burden - For detection of rifampicin resistance, we considered multi-drug-resistant tuberculosis burden • To compare multiple Xpert MTB/RIF or Xpert Ultra results (repeated testing) with the initial Xpert MTB/RIF or Xpert Ultra result SEARCH METHODS: We searched the Cochrane Infectious Diseases Group Specialized Register, MEDLINE, Embase, Science Citation Index, the Cumulative Index to Nursing and Allied Health Literature (CINAHL), Scopus, the WHO International Clinical Trials Registry Platform, ClinicalTrials.gov, and the International Standard Randomized Controlled Trials Number (ISRCTN) Registry up to 29 April 2019, without language restrictions. SELECTION CRITERIA Randomized trials, cross-sectional trials, and cohort studies evaluating Xpert MTB/RIF or Xpert Ultra in HIV-positive and HIV-negative children younger than 15 years. Reference standards comprised culture or a composite reference standard for tuberculosis and drug susceptibility testing or MTBDRplus (molecular assay for detection of Mycobacterium tuberculosis and drug resistance) for rifampicin resistance. We included studies evaluating sputum, gastric aspirate, stool, nasopharyngeal or bronchial lavage specimens (pulmonary tuberculosis), cerebrospinal fluid (tuberculous meningitis), fine needle aspirates, or surgical biopsy tissue (lymph node tuberculosis). DATA COLLECTION AND ANALYSIS Two review authors independently extracted data and assessed study quality using the Quality Assessment of Studies of Diagnostic Accuracy - Revised (QUADAS-2). For each target condition, we used the bivariate model to estimate pooled sensitivity and specificity with 95% confidence intervals (CIs). We stratified all analyses by type of reference standard. We assessed certainty of evidence using the GRADE approach. MAIN RESULTS For pulmonary tuberculosis, 299 data sets (68,544 participants) were available for analysis; for tuberculous meningitis, 10 data sets (423 participants) were available; for lymph node tuberculosis, 10 data sets (318 participants) were available; and for rifampicin resistance, 14 data sets (326 participants) were available. Thirty-nine studies (80%) took place in countries with high tuberculosis burden. Risk of bias was low except for the reference standard domain, for which risk of bias was unclear because many studies collected only one specimen for culture. Detection of pulmonary tuberculosis For sputum specimens, Xpert MTB/RIF pooled sensitivity (95% CI) and specificity (95% CI) verified by culture were 64.6% (55.3% to 72.9%) (23 studies, 493 participants; moderate-certainty evidence) and 99.0% (98.1% to 99.5%) (23 studies, 6119 participants; moderate-certainty evidence). For other specimen types (nasopharyngeal aspirate, 4 studies; gastric aspirate, 14 studies; stool, 11 studies), Xpert MTB/RIF pooled sensitivity ranged between 45.7% and 73.0%, and pooled specificity ranged between 98.1% and 99.6%. For sputum specimens, Xpert Ultra pooled sensitivity (95% CI) and specificity (95% CI) verified by culture were 72.8% (64.7% to 79.6%) (3 studies, 136 participants; low-certainty evidence) and 97.5% (95.8% to 98.5%) (3 studies, 551 participants; high-certainty evidence). For nasopharyngeal specimens, Xpert Ultra sensitivity (95% CI) and specificity (95% CI) were 45.7% (28.9% to 63.3%) and 97.5% (93.7% to 99.3%) (1 study, 195 participants). For all specimen types, Xpert MTB/RIF and Xpert Ultra sensitivity were lower against a composite reference standard than against culture. Detection of tuberculous meningitis For cerebrospinal fluid, Xpert MTB/RIF pooled sensitivity and specificity, verified by culture, were 54.0% (95% CI 27.8% to 78.2%) (6 studies, 28 participants; very low-certainty evidence) and 93.8% (95% CI 84.5% to 97.6%) (6 studies, 213 participants; low-certainty evidence). Detection of lymph node tuberculosis For lymph node aspirates or biopsies, Xpert MTB/RIF pooled sensitivity and specificity, verified by culture, were 90.4% (95% CI 55.7% to 98.6%) (6 studies, 68 participants; very low-certainty evidence) and 89.8% (95% CI 71.5% to 96.8%) (6 studies, 142 participants; low-certainty evidence). Detection of rifampicin resistance Xpert MTB/RIF pooled sensitivity and specificity were 90.0% (67.6% to 97.5%) (6 studies, 20 participants; low-certainty evidence) and 98.3% (87.7% to 99.8%) (6 studies, 203 participants; moderate-certainty evidence). AUTHORS' CONCLUSIONS We found Xpert MTB/RIF sensitivity to vary by specimen type, with gastric aspirate specimens having the highest sensitivity followed by sputum and stool, and nasopharyngeal specimens the lowest; specificity in all specimens was > 98%. Compared with Xpert MTB/RIF, Xpert Ultra sensitivity in sputum was higher and specificity slightly lower. Xpert MTB/RIF was accurate for detection of rifampicin resistance. Xpert MTB/RIF was sensitive for diagnosing lymph node tuberculosis. For children with presumed tuberculous meningitis, treatment decisions should be based on the entirety of clinical information and treatment should not be withheld based solely on an Xpert MTB/RIF result. The small numbers of studies and participants, particularly for Xpert Ultra, limits our confidence in the precision of these estimates.
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MESH Headings
- Adolescent
- Antibiotics, Antitubercular/therapeutic use
- Bias
- Child
- Feces/microbiology
- Gastrointestinal Contents/microbiology
- Humans
- Molecular Typing/methods
- Molecular Typing/standards
- Mycobacterium tuberculosis/drug effects
- Mycobacterium tuberculosis/isolation & purification
- Rifampin/therapeutic use
- Sensitivity and Specificity
- Sputum/microbiology
- Tuberculosis, Lymph Node/diagnosis
- Tuberculosis, Lymph Node/drug therapy
- Tuberculosis, Lymph Node/microbiology
- Tuberculosis, Meningeal/cerebrospinal fluid
- Tuberculosis, Meningeal/diagnosis
- Tuberculosis, Meningeal/drug therapy
- Tuberculosis, Meningeal/microbiology
- Tuberculosis, Multidrug-Resistant/diagnosis
- Tuberculosis, Multidrug-Resistant/drug therapy
- Tuberculosis, Multidrug-Resistant/microbiology
- Tuberculosis, Pulmonary/diagnosis
- Tuberculosis, Pulmonary/drug therapy
- Tuberculosis, Pulmonary/microbiology
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Affiliation(s)
- Alexander W Kay
- The Global Tuberculosis Program, Texas Children's Hospital, Section of Global and Immigrant Health, Department of Pediatrics, Baylor College of Medicine, Houston, Texas, USA
| | | | - Yemisi Takwoingi
- Test Evaluation Research Group, Institute of Applied Health Research, University of Birmingham, Birmingham, UK
| | - Michael Eisenhut
- Paediatric Department, Luton & Dunstable University Hospital NHS Foundation Trust, Luton, UK
| | | | - Karen R Steingart
- Honorary Research Fellow, Department of Clinical Sciences, Liverpool School of Tropical Medicine, Liverpool, UK
| | - Anna M Mandalakas
- The Global Tuberculosis Program, Texas Children's Hospital, Section of Global and Immigrant Health, Department of Pediatrics, Baylor College of Medicine, Houston, Texas, USA
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89
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Utility of circulating cell-free Mycobacterium tuberculosis DNA for the improved diagnosis of abdominal tuberculosis. PLoS One 2020; 15:e0238119. [PMID: 32845896 PMCID: PMC7449497 DOI: 10.1371/journal.pone.0238119] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Accepted: 08/09/2020] [Indexed: 12/13/2022] Open
Abstract
Abdominal tuberculosis (ATB) continues to pose a major diagnostic challenge for clinicians due to its nonspecific clinical presentation, variable anatomical location and lack of sensitive diagnostic tools. In spite of the development of several assays till date; no single test has proved to be adequate for ATB diagnosis. In this study, we for the first time report the detection of circulating cell-free Mycobacterium tuberculosis (M. tuberculosis) DNA (cfMTB-DNA) in ascitic fluid (AF) samples and its utility in ATB diagnosis. Sixty-five AF samples were included in the study and processed for liquid culture, cytological, biochemical and molecular assays. A composite reference standard (CRS) was formulated to categorize the patients into 'Definite ATB' (M. tuberculosis culture positive, n = 2), 'Probable ATB' (n = 16), 'Possible ATB' (n = 13) and 'Non-TB' category (n = 34). Two molecular assays were performed, namely, the novel cfMTB-DNA qPCR assay targeting M. tuberculosis devR gene and Xpert MTB/RIF assay (Xpert), and their diagnostic accuracy was assessed using CRS as reference standard. Clinical features such as fever, loss of weight, abdominal distension and positive Mantoux were found to be strongly associated with ATB disease (p<0.05). cfMTB-DNA qPCR had a sensitivity of 66.7% (95% CI:40.9,86.7) with 97.1% specificity (95% CI:84.7,99.9) in 'Definite ATB' and 'Probable ATB' group collectively. The sensitivity increased to 70.9% (95% CI:51.9,85.8) in the combined 'Definite', 'Probable' and 'Possible' ATB group with similar specificity. The cfMTB-DNA qPCR assay performed significantly better than the Xpert assay which demonstrated a poor sensitivity of ≤16.7% with 100% (95% CI:89.7,100) specificity (p<0.001). We conclude that cfMTB-DNA qPCR assay is an accurate molecular test that can provide direct evidence of M. tuberculosis etiology and has promise to pave the way for improving ATB diagnosis.
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90
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Xpert MTB/RIF ultra for rapid diagnosis of extrapulmonary tuberculosis in a high-income low-tuberculosis prevalence setting. Sci Rep 2020; 10:13959. [PMID: 32811871 PMCID: PMC7435271 DOI: 10.1038/s41598-020-70613-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Accepted: 07/30/2020] [Indexed: 11/09/2022] Open
Abstract
The diagnosis of extrapulmonary tuberculosis (EPTB) is often challenging due to paucibacillary nature of the disease. Xpert MTB/RIF Ultra (Ultra) has been developed to improve detection of Mycobacterium tuberculosis complex (MTC) in paucibacillary specimens. The objective of the study was to assess the performance of Ultra for the diagnosis of EPTB in a high-income low TB prevalence country. Extrapulmonary samples received for TB diagnostics at two hospitals in Norway between January 2015 and January 2016 were prospectively and consecutively included. Defrosted samples were subjected to Ultra. Culture and routine PCR tests were used as reference standard. A total of 82 samples, 10 culture and/or routine PCR positive (confirmed TB) samples and 72 culture and routine PCR negative samples were included in analysis. The overall sensitivity and specificity of Ultra were 90% (9/10, 95% CI 56-100) and 99% (71/72, 95% CI 93-100), respectively. Ultra was positive in 6/7 smear negative confirmed TB samples. To conclude, Ultra showed a high sensitivity and specificity in extrapulmonary specimens and may contribute to a rapid diagnosis of EPTB in a low TB prevalence setting.
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91
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Kasibante J, Rutakingirwa MK, Kagimu E, Ssebambulidde K, Ellis J, Tugume L, Mpoza E, Cresswell F, Meya DB. Tuberculosis preventive therapy (TPT) to prevent tuberculosis co-infection among adults with HIV-associated cryptococcal meningitis: A clinician's perspective. J Clin Tuberc Other Mycobact Dis 2020; 20:100180. [PMID: 32875123 PMCID: PMC7452161 DOI: 10.1016/j.jctube.2020.100180] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
As part of the END TB strategy, the World Health organization (WHO) recommends provision of tuberculosis preventive therapy (TPT) to all people at high risk of developing active TB disease. Patients with HIV-associated cryptococcal meningitis are severely immunocompromised and therefore should be eligible for TPT. In this commentary we discuss the challenges associated with starting tuberculosis preventive therapy in patients with HIV associated cryptococcal meningitis in a clinical setting, we highlight the benefit, existing gaps and research opportunities of tuberculosis preventive therapy in this patient population.
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Affiliation(s)
- John Kasibante
- Infectious Diseases Institute, Makerere University, Kampala, Uganda
| | | | - Enock Kagimu
- Infectious Diseases Institute, Makerere University, Kampala, Uganda
| | | | - Jayne Ellis
- Infectious Diseases Institute, Makerere University, Kampala, Uganda.,Clinical Research Department, London School of Hygiene & Tropical Medicine, Keppel St, Bloomsbury, London WC1E 7HT, UK
| | - Lillian Tugume
- Infectious Diseases Institute, Makerere University, Kampala, Uganda
| | - Edward Mpoza
- Infectious Diseases Institute, Makerere University, Kampala, Uganda
| | - Fiona Cresswell
- Clinical Research Department, London School of Hygiene & Tropical Medicine, Keppel St, Bloomsbury, London WC1E 7HT, UK.,Medical Research Council - Uganda Virus Research Institute and London School of Hygiene and Tropical Medicine Uganda Research Unit, Entebbe, Uganda
| | - David B Meya
- Infectious Diseases Institute, Makerere University, Kampala, Uganda.,School of Medicine, College of Health Sciences, Makerere University, Kampala, Uganda
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92
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Foppiano Palacios C, Saleeb PG. Challenges in the diagnosis of tuberculous meningitis. J Clin Tuberc Other Mycobact Dis 2020; 20:100164. [PMID: 32462082 PMCID: PMC7240715 DOI: 10.1016/j.jctube.2020.100164] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Tuberculosis (TB) continues to pose a significant public health problem. Tuberculous meningitis (TBM) is the most severe form of extra-pulmonary TB. TBM carries a high mortality rate, including for those receiving treatment for TB. Diagnosis of TBM is difficult for clinicians as it can clinically present similarly to other forms of meningitis. The difficulty in diagnosis often leads to a delay in treatment and subsequent mortality. Those who survive are left with long-term sequelae leading to lifelong disability. The microbiologic diagnosis of TBM requires the isolation of Mycobacterium tuberculosis from the cerebrospinal fluid (CSF) of an infected patient. The diagnosis of tuberculous meningitis continues to be challenging for clinicians. Unfortunately, many cases of TBM cannot be confirmed based on clinical and imaging findings as the clinical findings are nonspecific, while laboratory techniques are largely insensitive or slow. Until recently, the lack of accessible and timely tests has contributed to a delay in diagnosis and subsequent morbidity and mortality for many patients, particularly those in resourcelimited settings. The availability of Xpert Ultra and point-of-care lipoarabinomannan (LAM) testing could represent a new era of prompt diagnosis and early treatment of tuberculous meningitis. However, clinicians must be cautious when ruling out TBM with Xpert Ultra due to its low negative predictive value. Due to the limitations of current diagnostics, clinicians should utilize a combination of diagnostic modalities in order to prevent morbidity in patients with TBM.
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Affiliation(s)
- Carlo Foppiano Palacios
- Departments of Internal Medicine and Pediatrics, University of Maryland Medical Center, 22 S Greene St, Baltimore, MD 21201, United States
| | - Paul G. Saleeb
- Institute of Human Virology, University of Maryland School of Medicine, 725 W Lombard St, Baltimore, MD 21201, United States
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93
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Andrianto A, Mertaniasih NM, Gandi P, Al-Farabi MJ, Azmi Y, Jonatan M, Silahooij SI. Diagnostic test accuracy of Xpert MTB/RIF for tuberculous pericarditis: a systematic review and meta-analysis. F1000Res 2020; 9:761. [PMID: 32802321 PMCID: PMC7417956 DOI: 10.12688/f1000research.22770.1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 07/09/2020] [Indexed: 12/18/2022] Open
Abstract
Introduction: Xpert MTB/RIF is a rapid diagnostic instrument for pulmonary tuberculosis (TB). However, studies reported varied accuracy of Xpert MTB/RIF in detecting Mycobacterium tuberculosis in pericardial effusion. Methods: We performed a systematic review of literature in PubMed, published up to February 1, 2020, according to PRISMA guidelines. We screened cross-sectional studies, observational cohort studies, and randomized control trials that evaluated the accuracy of Xpert MTB/RIF in diagnosing TB pericarditis. Papers with noninterpretable results of sensitivity and specificity, non-English articles, and unpublished studies were excluded. The primary outcomes were the sensitivity and specificity of Xpert MTB/RIF. We conducted a quality assessment using QUADAS-2 to evaluate the quality of the studies. A bivariate model pooled the overall sensitivity, specificity, positive likelihood ratios (PLRs), and negative likelihood ratios (NLRs) of included studies. Results: In total, 581 subjects from nine studies were analyzed in this meta-analysis. Our pooled analysis showed that the overall sensitivity, specificity, PLRs and NLRs of included studies were 0.676 (95% CI: 0.580-0.759), 0.994 (95% CI: 0.919-1.000), 110.11 (95% CI: 7.65-1584.57) and 0.326 (95% CI: 0.246-0.433), respectively. Conclusions: Xpert MTB/RIF had a robust specificity but unsatisfactory sensitivity in diagnosing TB pericarditis. These findings indicated that although positive Xpert MTB/RIF test results might be valuable in swiftly distinguishing the diagnosis of TB pericarditis, negative test results might not be able to rule out TB pericarditis. Registration: PROSPERO CRD42020167480 28/04/2020.
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Affiliation(s)
- Andrianto Andrianto
- Faculty of Medicine, Universitas Airlangga, Surabaya, 60132, Indonesia
- Department of Cardiology and Vascular Medicine, Faculty of Medicine, Universitas Airlangga, Soetomo General Academic Hospital, Surabaya, 60286, Indonesia
| | - Ni Made Mertaniasih
- Faculty of Medicine, Universitas Airlangga, Surabaya, 60132, Indonesia
- Department of Clinical Microbiology, Faculty of Medicine, Universitas Airlangga, Surabaya, 60132, Indonesia
| | - Parama Gandi
- Faculty of Medicine, Universitas Airlangga, Surabaya, 60132, Indonesia
- Department of Cardiology and Vascular Medicine, Faculty of Medicine, Universitas Airlangga, Soetomo General Academic Hospital, Surabaya, 60286, Indonesia
| | - Makhyan Jibril Al-Farabi
- Department of Cardiology and Vascular Medicine, Faculty of Medicine, Universitas Airlangga, Soetomo General Academic Hospital, Surabaya, 60286, Indonesia
- School of Management, University College London, London, UK
| | - Yusuf Azmi
- Faculty of Medicine, Universitas Airlangga, Surabaya, 60132, Indonesia
| | - Michael Jonatan
- Faculty of Medicine, Universitas Airlangga, Surabaya, 60132, Indonesia
| | - Stevanus Immanuel Silahooij
- Faculty of Medicine, Universitas Airlangga, Surabaya, 60132, Indonesia
- Department of Internal Medicine, Faculty of Medicine, Universitas Airlangga, Soetomo General Academic Hospital, Surabaya, 60286, Indonesia
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94
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Cresswell FV, Davis AG, Sharma K, Basu Roy R, Ganiem AR, Kagimu E, Solomons R, Wilkinson RJ, Bahr NC, Thuong NTT. Recent Developments in Tuberculous Meningitis Pathogenesis and Diagnostics. Wellcome Open Res 2020; 4:164. [PMID: 33364436 PMCID: PMC7739117 DOI: 10.12688/wellcomeopenres.15506.2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/24/2020] [Indexed: 12/15/2022] Open
Abstract
The pathogenesis of Tuberculous meningitis (TBM) is poorly understood, but contemporary molecular biology technologies have allowed for recent improvements in our understanding of TBM. For instance, neutrophils appear to play a significant role in the immunopathogenesis of TBM, and either a paucity or an excess of inflammation can be detrimental in TBM. Further, severity of HIV-associated immunosuppression is an important determinant of inflammatory response; patients with the advanced immunosuppression (CD4+ T-cell count of <150 cells/μL) having higher CSF neutrophils, greater CSF cytokine concentrations and higher mortality than those with CD4+ T-cell counts > 150 cells/μL. Host genetics may also influence outcomes with LT4AH genotype predicting inflammatory phenotype, steroid responsiveness and survival in Vietnamese adults with TBM. Whist in Indonesia, CSF tryptophan level was a predictor of survival, suggesting tryptophan metabolism may be important in TBM pathogenesis. These varying responses mean that we must consider whether a "one-size-fits-all" approach to anti-bacillary or immunomodulatory treatment in TBM is truly the best way forward. Of course, to allow for proper treatment, early and rapid diagnosis of TBM must occur. Diagnosis has always been a challenge but the field of TB diagnosis is evolving, with sensitivities of at least 70% now possible in less than two hours with GeneXpert MTB/Rif Ultra. In addition, advanced molecular techniques such as CRISPR-MTB and metagenomic next generation sequencing may hold promise for TBM diagnosis. Host-based biomarkers and signatures are being further evaluated in childhood and adult TBM as adjunctive biomarkers as even with improved molecular assays, cases are still missed. A better grasp of host and pathogen behaviour may lead to improved diagnostics, targeted immunotherapy, and possibly biomarker-based, patient-specific treatment regimens.
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Affiliation(s)
- Fiona V Cresswell
- Clinical Research Department, London School of Hygiene and Tropical Medicine, London, WC1E 7HT, UK
- Research Department, Infectious Diseases Institute, Kampala, PO Box 22418, Uganda
- MRC-UVRI-London School of Hygiene and Tropical Medicine Uganda Research Unit, Entebbe, Uganda
| | - Angharad G. Davis
- University College London, London, WC1E6BT, UK
- Francis Crick Institute, London, NW1 1AT, UK
- Department of Medicine, Institute of Infectious Diseases and Molecular Medicine, University of Cape Town, 7925, South Africa
| | - Kusum Sharma
- Department of Medical Microbiology, Post-graduate Department of Medical Education and Research, Chandigahr, India
| | - Robindra Basu Roy
- Clinical Research Department, London School of Hygiene and Tropical Medicine, London, WC1E 7HT, UK
| | - Ahmad Rizal Ganiem
- Department of Neurology, Hasan Sadikin Hospital, Faculty of Medicine. Universitas Padjadjaran, Bandung, Indonesia
| | - Enock Kagimu
- Research Department, Infectious Diseases Institute, Kampala, PO Box 22418, Uganda
| | - Regan Solomons
- Department of Paediatrics and Child Health, Faculty of Medicine and Health Sciences, Stellenbosch University, South Africa
| | - Robert J. Wilkinson
- Francis Crick Institute, London, NW1 1AT, UK
- Department of Medicine, Institute of Infectious Diseases and Molecular Medicine, University of Cape Town, 7925, South Africa
- Department of Infectious Diseases, Imperial College, London, W2 1PG, UK
| | - Nathan C Bahr
- Division of Infectious Diseases. Department of Medicine., University of Kansas, Kansas City, USA
| | | | - Tuberculous Meningitis International Research Consortium
- Clinical Research Department, London School of Hygiene and Tropical Medicine, London, WC1E 7HT, UK
- Research Department, Infectious Diseases Institute, Kampala, PO Box 22418, Uganda
- MRC-UVRI-London School of Hygiene and Tropical Medicine Uganda Research Unit, Entebbe, Uganda
- University College London, London, WC1E6BT, UK
- Francis Crick Institute, London, NW1 1AT, UK
- Department of Medicine, Institute of Infectious Diseases and Molecular Medicine, University of Cape Town, 7925, South Africa
- Department of Medical Microbiology, Post-graduate Department of Medical Education and Research, Chandigahr, India
- Department of Neurology, Hasan Sadikin Hospital, Faculty of Medicine. Universitas Padjadjaran, Bandung, Indonesia
- Department of Paediatrics and Child Health, Faculty of Medicine and Health Sciences, Stellenbosch University, South Africa
- Department of Infectious Diseases, Imperial College, London, W2 1PG, UK
- Division of Infectious Diseases. Department of Medicine., University of Kansas, Kansas City, USA
- Oxford University Clinical Research Unit, Ho Chi Minh City, Vietnam
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95
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Evaluation of Xpert MTB/RIF for the Diagnosis of Lymphatic Tuberculosis. BIOMED RESEARCH INTERNATIONAL 2020; 2020:1968487. [PMID: 32685449 PMCID: PMC7338981 DOI: 10.1155/2020/1968487] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 06/08/2020] [Accepted: 06/15/2020] [Indexed: 11/18/2022]
Abstract
Background The World Health Organization approved the use of Xpert MTB/RIF for the detection of Mycobacterium tuberculosis DNA, which has significantly improved the diagnosis of tuberculosis. In this study, our main objective was to evaluate the diagnostic efficacy of Xpert MTB/RIF for lymphoid tuberculosis to determine whether Xpert MTB/RIF could be used as a routine detection method. Materials and Methods We searched four databases for the relevant literature published from May 2007 to December 2019. The quality of the literature was evaluated with reference to the evaluation criteria. Data that were extracted from the literature on Xpert MTB/RIF diagnosis of lymphatic tuberculosis were used to plot the summary receiver operating characteristic (SROC) curve, after which the software was used to combine and analyze the accuracy of these data. Results A total of 27 studies were included. The sensitivity of Xpert MTB/RIF for detecting lymphatic tuberculosis was 0.79 (95% CI (0.77, 0.81)), the specificity was 0.88 (95% CI (0.87, 0.90)), and the positive likelihood ratio (PLR) was 7.21 (95% CI (4.93, 10.55)). In addition, the negative likelihood ratio (NLR) was 0.25 (95% CI (0.19, 0.32)) and the diagnostic odds ratio (DOR) was 40.23 (95% CI (24.53, 65.98)). At the same time, we used the extracted data to make the SROC curve, obtaining the following parameters: area under the curve (AUC) = 0.9144, Q = 0.8470 (SE = 0.0163). Conclusion Xpert MTB/RIF has high accuracy in detecting lymphatic tuberculosis, and it can be used to quickly and easily diagnose lymphatic tuberculosis at an early stage as a general method.
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96
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Zhang M, Li D, Hu ZD, Huang YL. The diagnostic utility of pleural markers for tuberculosis pleural effusion. ANNALS OF TRANSLATIONAL MEDICINE 2020; 8:607. [PMID: 32566633 PMCID: PMC7290547 DOI: 10.21037/atm.2019.09.110] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Tuberculosis pleural effusion (TPE) is common in clinical practice, and its diagnosis remains a challenge for clinicians. Ziehl-Neelsen staining, PE Mycobacterium tuberculosis culture, and biopsy are the gold standards for TPE diagnosis; however, they are time-consuming, invasive, observer-dependent, and insensitive. PE markers represent a rapid, low-cost, and non-invasive objective diagnostic tool for TPE. In the past decades, several PE biomarkers have been developed, and their diagnostic accuracy has been evaluated in many studies. Here, we reviewed the literature to summarize the diagnostic accuracy of these biomarkers, especially using the evidence from systematic review and meta-analysis. The current research strongly suggests that adenosine deaminase (ADA), interferon-gamma (IFN-γ), and interleukin 27 (IL-27) have extremely higher diagnostic accuracy for TPE, while the diagnostic accuracy of interferon gamma release assays (IGRAs), tumor necrosis factor-α (TNF-α), and interferon-γ-induced protein 10 kDa (IP-10) is moderate. Although some evidence supports C-X-C motif chemokine ligand 9 (CXCL9), CXCL11, CXCL12, sFas ligand, angiotensin-converting enzyme (ACE), calpain-1, spectrin breakdown products (SBDP), matrix metalloproteinase-1 (MMP-1), soluble CD26 (sCD26), soluble interleukin 2 receptor (sIL-2R) as useful diagnostic markers for TPE, more support is needed to validate their diagnostic accuracy. Finally, nucleic acid amplification tests (NAATs) have extremely high diagnostic specificity, but their sensitivity is low. Taken together, ADA is the preferred marker for TPE because its low cost and suitability for standardization.
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Affiliation(s)
- Man Zhang
- Department of Thoracic Surgery, The Affiliated Hospital of Inner Mongolia Medical University, Hohhot 010050, China
| | - Dan Li
- Department of Special Food and Equipment, Naval Special Medical Center, The Naval Military Medical University, Shanghai 200433, China
| | - Zhi-De Hu
- Department of Laboratory Medicine, The Affiliated Hospital of Inner Mongolia Medical University, Hohhot 010050, China
| | - Yuan-Lan Huang
- Department of Laboratory Medicine, Naval Special Medical Center, The Naval Military Medical University, Shanghai 200433, China
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97
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Subbaraman R, Jhaveri T, Nathavitharana RR. Closing gaps in the tuberculosis care cascade: an action-oriented research agenda. J Clin Tuberc Other Mycobact Dis 2020; 19:100144. [PMID: 32072022 PMCID: PMC7015982 DOI: 10.1016/j.jctube.2020.100144] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
The care cascade-which evaluates outcomes across stages of patient engagement in a health system-is an important framework for assessing quality of tuberculosis (TB) care. In recent years, there has been progress in measuring care cascades in high TB burden countries; however, there are still shortcomings in our knowledge of how to reduce poor patient outcomes. In this paper, we outline a research agenda for understanding why patients fall through the cracks in the care cascade. The pathway for evidence generation will require new systematic reviews, observational cohort studies, intervention development and testing, and continuous quality improvement initiatives embedded within national TB programs. Certain gaps, such as pretreatment loss to follow-up and post-treatment disease recurrence, should be a priority given a relative paucity of high-quality research to understand and address poor outcomes. Research on interventions to reduce death and loss to follow-up during treatment should move beyond a focus on monitoring (or observation) strategies, to address patient needs including psychosocial and nutritional support. While key research questions vary for each gap, some patient populations may experience disparities across multiple stages of care and should be a priority for research, including men, individuals with a prior treatment history, and individuals with drug-resistant TB. Closing gaps in the care cascade will require investments in a bold and innovative action-oriented research agenda.
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Affiliation(s)
- Ramnath Subbaraman
- Department of Public Health and Community Medicine and Center for Global Public Health, Tufts University School of Medicine, Boston, USA
- Division of Geographic Medicine and Infectious Diseases, Tufts Medical Center, Boston, USA
| | - Tulip Jhaveri
- Division of Geographic Medicine and Infectious Diseases, Tufts Medical Center, Boston, USA
| | - Ruvandhi R. Nathavitharana
- Division of Infectious Diseases, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, USA
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98
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Swaminathan A, du Cros P, Achar J, Kliescikova J, Mirgayosieva S, Pirmahmadzoda B. A case report of a child with probable drug resistant tuberculous pericarditis with a review of challenges involved in diagnosis, treatment and follow up of children with DR-TB pericarditis. BMC Infect Dis 2020; 20:298. [PMID: 32321429 PMCID: PMC7178721 DOI: 10.1186/s12879-020-05027-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Accepted: 04/12/2020] [Indexed: 01/23/2023] Open
Abstract
Background There are unique challenges in the diagnosis and management of multi drug resistant tuberculosis (MDR-TB) in children. It is difficult to obtain confirmatory microbiological diagnosis in TB pericarditis. It is essential to differentiate between drug sensitive and drug resistant forms of TB as it has a major bearing on the regimen used, and inappropriate TB treatment combined with steroid use for pericarditis can lead to deterioration. With lack of samples, the treatment decision relies on the drug resistance pattern of the close contact if available. Therapeutic challenges of MDR-TB management in a child involve use of toxic drugs that need to be judiciously handled. We report a 2 years 4 months old male child who was diagnosed with TB pericarditis and treated based on the resistance pattern of his mother who was on treatment for pulmonary MDR-TB. Case presentation This 2 years 4 months old male child was diagnosed with TB involving his pericardium. Getting him started on an appropriate regimen was delayed due to the difficulty in establishing microbiological confirmation and drug susceptibility. He was commenced on a regimen based on his mother’s drug resistance pattern and required surgery due to cardiac failure during the course of his treatment. He successfully completed 2 years of therapy. Conclusions This child’s case demonstrates that despite unique challenges in diagnosis and management of drug resistant extra pulmonary tuberculosis in children, treatment of even complex forms can be successful. The need for high suspicion of MDR-TB, especially when there is close contact with pulmonary TB, careful design of an effective regimen that is tolerated by the child, indications for invasive surgical management of pericarditis, appropriate follow-up and management of adverse effects are emphasised.
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Affiliation(s)
- Aravind Swaminathan
- Médecins Sans Frontières (MSF), Dushanbe, Tajikistan. .,Clinical Fellow, Paediatric Intensive Care Unit, Great Ormond Street Hospital, London, UK.
| | | | - Jay Achar
- Médecins Sans Frontières (MSF), Manson Unit, London, UK
| | | | | | - Bobojon Pirmahmadzoda
- National Tuberculosis Programme, Ministry of Health and Social Protection of the Republic of Tajikistan, Dushanbe, Tajikistan
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Naicker K, Ntsekhe M. Tuberculous pericardial disease: a focused update on diagnosis, therapy and prevention of complications. Cardiovasc Diagn Ther 2020; 10:289-295. [PMID: 32420111 DOI: 10.21037/cdt.2019.09.20] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Tuberculous pericarditis (TBP) is the most important manifestation of tuberculous heart disease and is still associated with a significant morbidity and mortality in TB endemic areas. The high prevalence of the disorder over the last 3 decades has been fueled by the human immunodeficiency virus/AIDS (HIV/AIDS) pandemic in these areas. The objective of this review is to provide a focused update on developments in the diagnosis and therapy of this condition, prevention of its complications, as well as future novel therapies. The definitive diagnosis of a tuberculous etiology in patients with suspected TBP continues to pose a challenge for clinicians. Clinical prediction scores, although never formally validated have been used with some success. However, they may be prone to both over and underdiagnosis due to lack of pericardial fluid analysis. Recent studies evaluating Xpert MTB/RIF, suggest that this advanced polymerase chain reaction (PCR) based technology does not provide increased accuracy compared to earlier iterations. However a combined two test approach starting with Xpert MTB/RIF followed by either adenosine deaminase (ADA) or interferon gamma (IFN-γ) may provide for significantly enhanced specificity and sensitivity cost permitting. Pericardiocentesis remains the gold standard for managing the compressive pericardial fluid and its adverse hemodynamic sequelae. A four drug anti-TB drug regimen at standard doses and duration is recommended. However recent evidence suggests that these drugs penetrate the pericardium very poorly potentially explaining the high mortality observed particularly in those who are culture positive with a high bacillary load. Constrictive pericarditis is the main long-term complication of TBP and is still a significant cause of heart failure in Sub-Saharan Africa. This is important because access to definitive surgical therapy where TBP is prevalent continues to be low, highlighting the need to develop strategies or interventions to prevent fibrosis and constriction. Recent detailed advanced studies of pericardial fluid in TBP have revealed a strong profibrotic transcriptomic profile, with high amounts of pro-inflammatory cytokines and low levels of the anti-fibrotic tetrapeptide N-Acetyl-Seryl-Aspartyl-Lysyl-Proline (Ac-SDKP). These new insights may explain in part the high propensity to fibrosis associated with the condition and offer hope for the future use of targeted therapy to interrupt pathways and mediators of tissue damage and subsequent maladaptive healing and fibrosis. The value of effective pericardiocentesis in reducing these pro-inflammatory and pro-fibrotic cytokines and peptides in an attempt to prevent pericardial constriction has yet to be established but has generated hypotheses for ongoing and future research.
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Affiliation(s)
- Kishendree Naicker
- Division of Cardiology, Department of Medicine, University of Cape Town, Groote Schuur Hospital, Cape Town, South Africa
| | - Mpiko Ntsekhe
- Division of Cardiology, Department of Medicine, University of Cape Town, Groote Schuur Hospital, Cape Town, South Africa
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Arpagaus A, Franzeck FC, Sikalengo G, Ndege R, Mnzava D, Rohacek M, Hella J, Reither K, Battegay M, Glass TR, Paris DH, Bani F, Rajab ON, Weisser M. Extrapulmonary tuberculosis in HIV-infected patients in rural Tanzania: The prospective Kilombero and Ulanga antiretroviral cohort. PLoS One 2020; 15:e0229875. [PMID: 32130279 PMCID: PMC7055864 DOI: 10.1371/journal.pone.0229875] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Accepted: 02/15/2020] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND In sub-Saharan Africa, diagnosis and management of extrapulmonary tuberculosis (EPTB) in people living with HIV (PLHIV) remains a major challenge. This study aimed to characterize the epidemiology and risk factors for poor outcome of extrapulmonary tuberculosis in people living with HIV (PLHIV) in a rural setting in Tanzania. METHODS We included PLHIV >18 years of age enrolled into the Kilombero and Ulanga antiretroviral cohort (KIULARCO) from 2013 to 2017. We assessed the diagnosis of tuberculosis by integrating prospectively collected clinical and microbiological data. We calculated prevalence- and incidence rates and used Cox regression analysis to evaluate the association of risk factors in extrapulmonary tuberculosis (EPTB) with a combined endpoint of lost to follow-up (LTFU) and death. RESULTS We included 3,129 subjects (64.5% female) with a median age of 38 years (interquartile range [IQR] 31-46) and a median CD4+ cell count of 229/μl (IQR 94-421) at baseline. During the median follow-up of 1.25 years (IQR 0.46-2.85), 574 (18.4%) subjects were diagnosed with tuberculosis, whereof 175 (30.5%) had an extrapulmonary manifestation. Microbiological evidence by Acid-Fast-Bacillus stain (AFB-stain) or Xpert® MTB/RIF was present in 178/483 (36.9%) patients with pulmonary and in 28/175 (16.0%) of patients with extrapulmonary manifestations, respectively. Incidence density rates for pulmonary Tuberculosis (PTB and EPTB were 17.9/1000person-years (py) (95% CI 14.2-22.6) and 5.8/1000 py (95% CI 4.0-8.5), respectively. The combined endpoint of death and LTFU was observed in 1058 (33.8%) patients, most frequently in the subgroup of EPTB (47.2%). Patients with EPTB had a higher rate of the composite outcome of death/LTFU after TB diagnosis than with PTB [HR 1.63, (1.14-2.31); p = 0.006]. The adjusted hazard ratios [HR (95% CI)] for death/LTFU in EPTB patients were significantly increased for patients aged >45 years [HR 1.95, (1.15-3.3); p = 0.013], whereas ART use was protective [HR 0.15, (0.08-0.27); p <0.001]. CONCLUSIONS Extrapulmonary tuberculosis was a frequent manifestation in this cohort of PLHIV. The diagnosis of EPTB in the absence of histopathology and mycobacterial culture remains challenging even with availability of Xpert® MTB/RIF. Patients with EPTB had increased rates of mortality and LTFU despite early recognition of the disease after enrollment.
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Affiliation(s)
- Armon Arpagaus
- Swiss Tropical and Public Health Institute, University of Basel, Basel, Switzerland
- University of Basel, Basel, Switzerland
| | - Fabian Christoph Franzeck
- Division of Infectious Diseases & Hospital Epidemiology, University Hospital Basel, University of Basel, Basel, Switzerland
| | - George Sikalengo
- Ifakara Health Institute, Ifakara, United Republic of Tanzania
- Saint Francis Referral Hospital, Ifakara, United Republic of Tanzania
| | - Robert Ndege
- Ifakara Health Institute, Ifakara, United Republic of Tanzania
- Saint Francis Referral Hospital, Ifakara, United Republic of Tanzania
| | - Dorcas Mnzava
- Ifakara Health Institute, Ifakara, United Republic of Tanzania
| | - Martin Rohacek
- Swiss Tropical and Public Health Institute, University of Basel, Basel, Switzerland
- University of Basel, Basel, Switzerland
- Ifakara Health Institute, Ifakara, United Republic of Tanzania
| | - Jerry Hella
- Swiss Tropical and Public Health Institute, University of Basel, Basel, Switzerland
- University of Basel, Basel, Switzerland
- Ifakara Health Institute, Ifakara, United Republic of Tanzania
| | - Klaus Reither
- Swiss Tropical and Public Health Institute, University of Basel, Basel, Switzerland
- University of Basel, Basel, Switzerland
| | - Manuel Battegay
- Division of Infectious Diseases & Hospital Epidemiology, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Tracy Renee Glass
- Swiss Tropical and Public Health Institute, University of Basel, Basel, Switzerland
- University of Basel, Basel, Switzerland
| | - Daniel Henry Paris
- Swiss Tropical and Public Health Institute, University of Basel, Basel, Switzerland
- University of Basel, Basel, Switzerland
| | - Farida Bani
- Ifakara Health Institute, Ifakara, United Republic of Tanzania
| | | | - Maja Weisser
- Swiss Tropical and Public Health Institute, University of Basel, Basel, Switzerland
- Division of Infectious Diseases & Hospital Epidemiology, University Hospital Basel, University of Basel, Basel, Switzerland
- Ifakara Health Institute, Ifakara, United Republic of Tanzania
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