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Zhang X, Tian Y, Shi Y, Liu J, Zhao C, Chang CC, Takarada T, Maeda M, Wang G. Naked-Eye LAMP Assay of M. tuberculosis in Sputum by In Situ Au Nanoprobe Identification: For the In Vitro Diagnostics of Tuberculosis. ACS Infect Dis 2024. [PMID: 38771809 DOI: 10.1021/acsinfecdis.4c00013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/23/2024]
Abstract
In spite of the development of diagnostic tests for Mycobacterium tuberculosis (M. tuberculosis), the etiological agent of tuberculosis, there has remained a gap between the established methods and an easily accessible diagnostic test, particularly in developing and resource-poor areas. By combining isothermal amplification of IS6110 as the target gene and recognition by DNA-functionalized Au nanoparticles (DNA-AuNPs), we develop a colorimetric LAMP assay for convenient in vitro diagnostics of tuberculosis with a quick (≤50 min) "yes" or "no" readout. The DNA-AuNPs not only tolerate the interference in the complex LAMP system but also afford in situ identification of the amplicon, allowing for colloidal dispersion via steric effect depending on DNA grafting density. The target-induced stabilization and red appearance of the DNA-AuNPs contrast with the occurrence of gray aggregates in a negative sample. Furthermore, the DNA-AuNPs demonstrate excellent performance after long-term (≥7 months) storage while preserving the unsacrificed sensitivity. The high specificity of the DNA-AuNPs is further demonstrated in the naked-eye LAMP assay of M. tuberculosis in patients' sputum samples. Given the rapidity, cost-effectiveness, and instrument-free characteristics, the naked-eye LAMP assay is particularly beneficial for tuberculosis diagnosis in urgent situations and resource-limited settings and can potentially expedite patient care and treatment initiation.
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Affiliation(s)
- Xiaochang Zhang
- State Key Laboratory of Marine Food Processing & Safety Control, College of Food Science and Engineering, Ocean University of China, 1299 Sansha Road, Qingdao 266404, China
| | - Yongshuai Tian
- Qingdao Hightop Biotech Co., Ltd., 369 Hedong Road, High-Tech Industrial Development Zone, Qingdao 266111, China
| | - Yali Shi
- State Key Laboratory of Marine Food Processing & Safety Control, College of Food Science and Engineering, Ocean University of China, 1299 Sansha Road, Qingdao 266404, China
| | - Jianan Liu
- Qingdao Hightop Biotech Co., Ltd., 369 Hedong Road, High-Tech Industrial Development Zone, Qingdao 266111, China
| | - Chenlin Zhao
- State Key Laboratory of Marine Food Processing & Safety Control, College of Food Science and Engineering, Ocean University of China, 1299 Sansha Road, Qingdao 266404, China
| | - Chia-Chen Chang
- Department of Medical Biotechnology and Laboratory Science, Chang Gung University, Taoyuan 333, Taiwan
| | - Tohru Takarada
- RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Mizuo Maeda
- RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Guoqing Wang
- State Key Laboratory of Marine Food Processing & Safety Control, College of Food Science and Engineering, Ocean University of China, 1299 Sansha Road, Qingdao 266404, China
- Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
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Brumwell A, Tso J, Pingali V, Millones AK, Jimenez J, Calderon RI, Barreda N, Lecca L, Nicholson T, Brooks M. A costing framework to compare tuberculosis infection tests. BMJ Glob Health 2023; 8:e012297. [PMID: 38035732 PMCID: PMC10689396 DOI: 10.1136/bmjgh-2023-012297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Accepted: 10/07/2023] [Indexed: 12/02/2023] Open
Abstract
OBJECTIVE To develop a framework to estimate the practical costs incurred from, and programmatic impact related to, tuberculosis (TB) infection testing-tuberculin skin tests (TST) versus interferon gamma release assay (IGRA)-in a densely populated high-burden TB area. METHODS We developed a seven-step framework that can be tailored to individual TB programmes seeking to compare TB infection (TBI) diagnostics to inform decision-making. We present methodology to estimate (1) the prevalence of TBI, (2) true and false positives and negatives for each test, (3) the cost of test administration, (4) the cost of false negatives, (5) the cost of treating all that test positive, (6) the per-test cost incurred due to treatment and misdiagnosis and (7) the threshold at which laboratory infrastructure investments for IGRA are outweighed by system-wide savings incurred due to IGRA utilisation. We then applied this framework in a densely populated, peri-urban district in Lima, Peru with high rates of Bacillus Calmette-Guérin (BCG) vaccination. FINDINGS The lower sensitivity of TST compared with IGRA is a major cost driver, leading to health system and societal costs due to misdiagnosis. Additionally, patient and staff productivity costs were greater for TST because it requires two patient visits compared with only one for IGRA testing. When the framework was applied to the Lima setting, we estimate that IGRA-associated benefits outweigh infrastructural costs after performing 672 tests. CONCLUSIONS Given global shortages of TST and concerns about costs of IGRA testing and laboratory capacity building, this costing framework can provide public health officials and TB programmes guidance for decision-making about TBI testing locally. This framework was designed to be adaptable for use in different settings with available data. Diagnostics that increase accuracy or mitigate time to treatment should be thought of as an investment instead of an expenditure.
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Affiliation(s)
- Amanda Brumwell
- Advance Access & Delivery, Inc, Durham, North Carolina, USA
- Department of Global Health, University of Washington, Seattle, Washington, USA
| | - Jade Tso
- Advance Access & Delivery, Inc, Durham, North Carolina, USA
- School of Medicine, University of California Davis, Davis, California, USA
| | - Viswanath Pingali
- Economics, Indian Institute of Management Ahmedabad, Ahmedabad, Gujarat, India
| | | | | | - Roger I Calderon
- Socios En Salud Sucursal Peru, Lima, Peru
- Grupo de Investigación en Bioquímica y Biología Sintética, Universidad Nacional Federico Villarreal, San Miguel, Peru
| | | | - Leonid Lecca
- Socios En Salud Sucursal Peru, Lima, Peru
- Global Health and Social Medicine, Harvard Medical School, Boston, Massachusetts, USA
| | - Tom Nicholson
- Advance Access & Delivery, Inc, Durham, North Carolina, USA
- Center for International Development, Duke University Sanford School of Public Policy, Durham, North Carolina, USA
| | - Meredith Brooks
- Global Health and Social Medicine, Harvard Medical School, Boston, Massachusetts, USA
- Global Health, Boston University School of Public Health, Boston, Massachusetts, USA
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Arumairaj AJ, Park H, Quesada F, Altonen B, Chaudhari S, Mattana J, Habtes I. Determining the Need for Additional Testing With Quantiferon TB Gold in Patients With Positive Tuberculin Skin Tests and a History of BCG Vaccination. Cureus 2023; 15:e39272. [PMID: 37342742 PMCID: PMC10279503 DOI: 10.7759/cureus.39272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/20/2023] [Indexed: 06/23/2023] Open
Abstract
OBJECTIVE To determine if the QuantiFERON-TB Gold (QFT) testing can be obviated for the diagnosis of latent tuberculosis infection (LTBI) in patients with a positive tuberculin skin test (TST) and a history of Bacillus Calmette-Guerin (BCG) vaccination by identifying high-risk features in patients with positive TST and a history of BCG vaccination who are associated with positive QFT. METHODS Retrospective chart review was done for 76 adult patients by dividing them into two groups. Group 1 consisted of true positive TST patients who had BCG vaccination and were positive for QFT. Group 2 consisted of false positive TST patients who had BCG vaccination but were negative for QFT. The two groups were compared to determine if the high-risk features of TST induration diameter of 15mm and more, TST induration of 20mm and more, recent immigration to the US, the advanced age of more than 65 years, country of origin with high TB burden, known exposure to active TB, and smoking history were more prevalent in Group 1 compared to Group 2. RESULTS Group 1 had 23 patients and Group 2 had 53 patients. Group 1 had a higher prevalence of patients with PPD induration of more than 10mm than Group 2, which was statistically significant with a P value of 0.03. Other risk factors of advanced age, exposure to active TB and smoking did not show statistically significant differences between Groups 1 and 2. Conclusion: This study also confirms that if the TST induration is more than 10mm in patients with a history of BCG vaccination, the TST induration is likely because of LTBI and is less likely because of cross-reaction with BCG vaccination.
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Affiliation(s)
- Antony J Arumairaj
- Internal Medicine, New York Medical College, Metropolitan Hospital Center, New York, USA
| | - Hansang Park
- Internal Medicine, New York Medical College, Metropolitan Hospital Center, New York, USA
| | - Fernando Quesada
- Internal Medicine, New York Medical College, Metropolitan Hospital Center, New York, USA
| | - Brian Altonen
- Biostatistics and Epidemiology, New York City Health and Hospitals Corporation, New York, USA
| | - Shobhana Chaudhari
- Internal Medicine, New York Medical College, Metropolitan Hospital Center, New York, USA
| | - Joseph Mattana
- Internal Medicine, New York Medical College, Metropolitan Hospital Center, New York, USA
| | - Imnett Habtes
- Internal Medicine, Division of Pulmonary and Critical Care, New York Medical College, Metropolitan Hospital Center, New York, USA
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Shamputa IC, Nguyen DTK, Higazy D, Abdelhadi A, MacKenzie H, Reddin M, Barker K, Webster D. Optimizing tuberculosis screening for immigrants in southern New Brunswick: A pilot study protocol. PLoS One 2022; 17:e0277255. [PMID: 36331954 PMCID: PMC9635694 DOI: 10.1371/journal.pone.0277255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Accepted: 10/23/2022] [Indexed: 11/06/2022] Open
Abstract
Introduction Immigrants from high tuberculosis-burdened countries have been shown to have an increased risk of latent tuberculosis infection (LTBI). To reduce the risk of increased tuberculosis cases in Canada, the country has a comprehensive immigration medical examination process that identifies individuals with active tuberculosis using chest X-ray; however, it fails to identify LTBI. The lack of LTBI identification is concerning because immigrants with LTBI are at an increased risk of developing active tuberculosis within their first few years of migration due to stressful experiences common to many immigrants. Objectives The goal of this pilot study is to improve the current LTBI screening protocols among immigrants from high tuberculosis incidence countries and to better prevent and manage tuberculosis cases, by introducing an LTBI screening pilot program. The objectives are threefold: 1) to screen LTBI in immigrants from high tuberculosis incidence countries, including immigrants identified as being at risk of LTBI by the NB health care system, using the QuantiFERON-TB Gold Plus interferon-gamma release assay (IGRA); 2) to offer LTBI treatment and supports to those identified as having LTBI; and 3) to assess immigrant and health care providers (HCPs) satisfaction of the LTBI screening pilot program. Methods This cross-sectional study seeks to recruit 288 participants. Participants will be recruited via posters, social media platforms, invitations at immigrant wellness check-ups, presentations to local ethnocultural groups, and by snowball sampling. Consenting participants will be asked to submit a blood sample for LTBI screening; if positive, participants will be assessed and offered treatment for LTBI based on clinical assessment. Participants and HCPs’ feedback will be gathered via short questionnaires. For the quantitative portion of the study, descriptive statistics will be used to summarize participant characteristics and feedback. Simultaneous logistic regression will be performed to identify variables associated with the IGRA test outcome and evidence of increased CD8 T-cell immune response among those found to be LTBI-positive. Qualitative results will be analyzed using inductive thematic analysis. Discussion The findings from this study will allow us to understand the role of the IGRA LTBI screening assay and its feasibility and acceptability by immigrants and HCPs in New Brunswick. The findings will additionally provide information on the enhancers and barriers of LTBI screening and management useful in determining how best to expand the LTBI screening program if deemed appropriate.
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Affiliation(s)
- Isdore Chola Shamputa
- Department of Nursing & Health Sciences, University of New Brunswick, Saint John, New Brunswick, Canada
| | - Duyen Thi Kim Nguyen
- Ministry of Health, Government of New Brunswick, Saint John, New Brunswick, Canada.,Faculty of Business, University of New Brunswick, Saint John, New Brunswick, Canada
| | - Doaa Higazy
- Saint John Newcomers Centre Inc., Newcomer Settlement, Saint John, New Brunswick, Canada
| | - Amani Abdelhadi
- Newcomer Connection, The YMCA of Greater Saint John, Saint John, New Brunswick, Canada
| | - Hope MacKenzie
- Division of Microbiology, Department of Laboratory Medicine, Saint John Regional Hospital, Saint John, New Brunswick, Canada
| | - Michelle Reddin
- Ministry of Health, Government of New Brunswick, Saint John, New Brunswick, Canada
| | - Kimberley Barker
- Ministry of Health, Government of New Brunswick, Saint John, New Brunswick, Canada
| | - Duncan Webster
- Division of Microbiology, Department of Laboratory Medicine, Saint John Regional Hospital, Saint John, New Brunswick, Canada.,Faculty of Medicine, Dalhousie University New Brunswick, Saint John, New Brunswick, Canada.,Division of Infectious Diseases, Department of Medicine, Saint John Regional Hospital, Saint John, New Brunswick, Canada
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5
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Yu Y, Liu Y, Yao L, Shen Y, Sun Q, Sha W. Factors Influencing False-Negative Results of QuantiFERON-TB Gold In-Tube (QFT-GIT) in Active Tuberculosis and the Desirability of Resetting Cutoffs for Different Populations: A Retrospective Study. Trop Med Infect Dis 2022; 7:tropicalmed7100278. [PMID: 36288019 PMCID: PMC9607193 DOI: 10.3390/tropicalmed7100278] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2022] [Revised: 09/20/2022] [Accepted: 09/26/2022] [Indexed: 11/07/2022] Open
Abstract
Objectives The value of QuantiFERON-TB Gold In-Tube (QFT-GIT) in the diagnosis of TB varies by population, comorbidities, and other factors. In this study, we aimed to investigate factors that influence false-negative results of QFT-GIT test in the diagnosis of TB as well as the impact of different cutoffs on the diagnostic value. Methods A total of 3562 patients who underwent QFT-GIT tests at Shanghai Pulmonary Hospital were enrolled retrospectively between May 2016 and May 2017. False-negative and false-positive results were analyzed using different clinical stratifications. The optimal cutoff values were established under different clinical conditions. Results Positive QFT-GIT results greatly shortened the time taken to diagnose smear-negative TB. The factors of age, smear and culture results, site of TB, comorbidity with tumors, white blood cell count, neutrophil count, and CD4/CD8 ratio were significantly correlated with false-negative QFT-GIT results (p < 0.05). Personalized cutoff values were established according to different influencing factors. The results showed high consistency between the smear-negative and total populations. Conclusion QFT-GIT can facilitate the early diagnosis of smear-negative TB. The diagnostic performance of the QFT-GIT test in the diagnosis of active TB was shown to be affected by many clinical factors. Personalized cutoff values may have superior value in the identification of active tuberculosis under different conditions.
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Affiliation(s)
- Yuanyuan Yu
- Department of Tuberculosis, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai 200433, China
- Clinical and Research Center for Tuberculosis, Shanghai Key Laboratory of Tuberculosis, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai 200433, China
| | - Yidian Liu
- Department of Tuberculosis, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai 200433, China
- Clinical and Research Center for Tuberculosis, Shanghai Key Laboratory of Tuberculosis, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai 200433, China
| | - Lan Yao
- Department of Tuberculosis, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai 200433, China
- Clinical and Research Center for Tuberculosis, Shanghai Key Laboratory of Tuberculosis, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai 200433, China
| | - Yanheng Shen
- Department of Tuberculosis, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai 200433, China
- Clinical and Research Center for Tuberculosis, Shanghai Key Laboratory of Tuberculosis, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai 200433, China
| | - Qin Sun
- Department of Tuberculosis, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai 200433, China
- Clinical and Research Center for Tuberculosis, Shanghai Key Laboratory of Tuberculosis, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai 200433, China
- Correspondence: (Q.S.); (W.S.)
| | - Wei Sha
- Department of Tuberculosis, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai 200433, China
- Clinical and Research Center for Tuberculosis, Shanghai Key Laboratory of Tuberculosis, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai 200433, China
- Correspondence: (Q.S.); (W.S.)
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6
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Girishan Prabhu V, Taaffe KM, Pirrallo RG, Shvorin D. A data driven policy to minimise the tuberculosis testing cost among healthcare workers. Int J Health Plann Manage 2022; 37:2697-2709. [PMID: 35527355 PMCID: PMC9541762 DOI: 10.1002/hpm.3496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 03/20/2022] [Accepted: 04/25/2022] [Indexed: 12/02/2022] Open
Abstract
Introduction The Centres for Disease Control and Prevention (CDC) mandates that healthcare employees at high‐risk exposure to Tuberculosis (TB) undergo annual testing. Currently, two methods of TB testing are used: a two‐step skin test (TST) or a whole‐blood test (IGRA). Healthcare leadership's test selection must account for not only direct costs such as procedure and resources but also indirect costs, including employee workplace absence. Methods A mathematical model based on Upstate South Carolina's largest health system affecting over 18,000 employees on six campuses was developed to investigate the value loss perspective of these testing methods and assist in decision‐making. A process flow map identified the varied direct and indirect costs for each test for four employee types, and 6 travel‐to‐testing‐site times were calculated. Results The switching point between testing procedures that minimised total system costs was most influenced by employee salary compared to travel distance. Switching from the current hospital policy to an integrated TST/IGRA testing could reduce TB compliance costs by 28%. Conclusions This study recommends an integrated approach as cost‐effective for large health systems with multiple campuses while considering the direct and indirect costs. When accounting for ‘inconvenience costs’ (stress, etc.) associated with visits, IGRAs are recommended irrespective of employee salary. High‐risk healthcare workers are required to undergo annual TB testing by CDC Two methods of TB testing are used: a two‐step skin test (TST) or a whole‐blood test (IGRA) While considering the testing and other travel costs, an integrated testing approach is cost‐effective for large health systems with multiple employee types and campuses. However, an IGRA test is recommended for all employees when considering additional inconvenience costs.
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Affiliation(s)
| | - Kevin M. Taaffe
- Department of Industrial Engineering Clemson University Clemson South Carolina USA
| | - Ronald G. Pirrallo
- Department of Emergency Medicine PRISMA Health ‐Upstate Greenville South Carolina USA
| | - Dotan Shvorin
- Department of Industrial Engineering Clemson University Clemson South Carolina USA
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COVID-19 and Beyond: Exploring Public Health Benefits from Non-Specific Effects of BCG Vaccination. Microorganisms 2021; 9:microorganisms9102120. [PMID: 34683441 PMCID: PMC8539044 DOI: 10.3390/microorganisms9102120] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 09/29/2021] [Accepted: 10/06/2021] [Indexed: 12/23/2022] Open
Abstract
Bacille Calmette–Guérin (BCG) vaccination, widely used throughout the world to protect against infant tuberculous meningitis and miliary tuberculosis (TB), can provide broad non-specific protection against infectious respiratory diseases in certain groups. Interest in BCG has seen a resurgence within the scientific community as the mechanisms for non-specific protection have begun to be elucidated. The impact of the COVID-19 pandemic on nearly every aspect of society has profoundly illustrated the pressure that respiratory infections can place on a national healthcare system, further renewing interest in BCG vaccination as a public health policy to reduce the burden of those illnesses. However, the United States does not recommend BCG vaccination due to its variable effectiveness against adult TB, the relatively low risk of Mycobacterium tuberculosis infection in most of the United States, and the vaccine’s interference with tuberculin skin test reactivity that complicates TB screening. In this review, we explore the broad immune training effects of BCG vaccination and literature on the effects of BCG vaccination on COVID-19 spread, disease severity, and mortality. We further discuss barriers to scheduled BCG vaccination in the United States and how those barriers could potentially be overcome.
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Martin DR, Sibuyi NR, Dube P, Fadaka AO, Cloete R, Onani M, Madiehe AM, Meyer M. Aptamer-Based Diagnostic Systems for the Rapid Screening of TB at the Point-of-Care. Diagnostics (Basel) 2021; 11:1352. [PMID: 34441287 PMCID: PMC8391981 DOI: 10.3390/diagnostics11081352] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Revised: 07/07/2021] [Accepted: 07/12/2021] [Indexed: 12/17/2022] Open
Abstract
The transmission of Tuberculosis (TB) is very rapid and the burden it places on health care systems is felt globally. The effective management and prevention of this disease requires that it is detected early. Current TB diagnostic approaches, such as the culture, sputum smear, skin tuberculin, and molecular tests are time-consuming, and some are unaffordable for low-income countries. Rapid tests for disease biomarker detection are mostly based on immunological assays that use antibodies which are costly to produce, have low sensitivity and stability. Aptamers can replace antibodies in these diagnostic tests for the development of new rapid tests that are more cost effective; more stable at high temperatures and therefore have a better shelf life; do not have batch-to-batch variations, and thus more consistently bind to a specific target with similar or higher specificity and selectivity and are therefore more reliable. Advancements in TB research, in particular the application of proteomics to identify TB specific biomarkers, led to the identification of a number of biomarker proteins, that can be used to develop aptamer-based diagnostic assays able to screen individuals at the point-of-care (POC) more efficiently in resource-limited settings.
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Affiliation(s)
- Darius Riziki Martin
- DSI/Mintek Nanotechnology Innovation Centre-Biolabels Node, Department of Biotechnology, University of the Western Cape, Private Bag X17, Bellville 7535, South Africa; (D.R.M.); (N.R.S.); (P.D.); (A.O.F.); (A.M.M.)
- South African Medical Research Council Bioinformatics Unit, South African National Bioinformatics Institute, University of the Western Cape, Private Bag X17, Bellville 7535, South Africa;
| | - Nicole Remaliah Sibuyi
- DSI/Mintek Nanotechnology Innovation Centre-Biolabels Node, Department of Biotechnology, University of the Western Cape, Private Bag X17, Bellville 7535, South Africa; (D.R.M.); (N.R.S.); (P.D.); (A.O.F.); (A.M.M.)
| | - Phumuzile Dube
- DSI/Mintek Nanotechnology Innovation Centre-Biolabels Node, Department of Biotechnology, University of the Western Cape, Private Bag X17, Bellville 7535, South Africa; (D.R.M.); (N.R.S.); (P.D.); (A.O.F.); (A.M.M.)
| | - Adewale Oluwaseun Fadaka
- DSI/Mintek Nanotechnology Innovation Centre-Biolabels Node, Department of Biotechnology, University of the Western Cape, Private Bag X17, Bellville 7535, South Africa; (D.R.M.); (N.R.S.); (P.D.); (A.O.F.); (A.M.M.)
| | - Ruben Cloete
- South African Medical Research Council Bioinformatics Unit, South African National Bioinformatics Institute, University of the Western Cape, Private Bag X17, Bellville 7535, South Africa;
| | - Martin Onani
- Department of Chemistry, University of the Western Cape, Private Bag X17, Bellville 7535, South Africa;
| | - Abram Madimabe Madiehe
- DSI/Mintek Nanotechnology Innovation Centre-Biolabels Node, Department of Biotechnology, University of the Western Cape, Private Bag X17, Bellville 7535, South Africa; (D.R.M.); (N.R.S.); (P.D.); (A.O.F.); (A.M.M.)
| | - Mervin Meyer
- DSI/Mintek Nanotechnology Innovation Centre-Biolabels Node, Department of Biotechnology, University of the Western Cape, Private Bag X17, Bellville 7535, South Africa; (D.R.M.); (N.R.S.); (P.D.); (A.O.F.); (A.M.M.)
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Gatechompol S, Harnpariphan W, Supanan R, Suwanpimolkul G, Sophonphan J, Ubolyam S, Kerr SJ, Avihingsanon A, Kawkitinarong K. Prevalence of latent tuberculosis infection and feasibility of TB preventive therapy among Thai prisoners: a cross-sectional study. BMC Public Health 2021; 21:1206. [PMID: 34162348 PMCID: PMC8223292 DOI: 10.1186/s12889-021-11271-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Accepted: 06/07/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Prisons are considered as major reservoirs for tuberculosis. Preventive therapy for latent TB infection (LTBI) is an adjunctive strategy to control TB. However, LTBI data in Thai prisoners is limited. This study assessed the prevalence of LTBI and feasibility of isoniazid preventive therapy (IPT). METHODS A cross-sectional study was conducted among prisoners in Klong Prem Central Prison, Bangkok. Participants were screened for active TB by questionnaire and chest X-ray. LTBI was evaluated by Tuberculin skin test (TST) and QuantiFERON-TB Gold Plus (QFTP) among subgroup. Participants with positive TST or QFTP were considered to have LTBI. Participants with LTBI were offered IPT. RESULTS From August 2018-November 2019, 1002 participants were analyzed. All participants were male with a median age of 38 (IQR 32-50) years. LTBI identified by either TST/QFTP was present in 466 (46.5%) participants. TST was positive in 359 (36%) participants. In the subgroup of 294 participants who had both TST and QFTP results, 181/294 (61.6%) tested positive by QFTP. Agreement between TST and QFTP was 55.1% (Kappa = 0.17). The risk factors associated with LTBI were previous incarceration (aOR 1.53, 95%CI, 1.16-2.01, p = 0.002), history of prior active TB (aOR 3.02, 95%CI, 1.74-5.24, p < 0.001) and duration of incarceration ≥10 years (aOR 1.86, 95%CI, 1.24-2.79, p = 0.003). Majority of LTBI participants (82%) agreed to take IPT. Three hundred and 56 (93%) participants completed treatment whereas 27 (7%) participants discontinued IPT due to the side effects of INH. CONCLUSION This is the first study to evaluate the prevalence of LTBI and feasibility of IPT among Thai prisoners. LTBI prevalence in male prisoners in Thailand is high. LTBI screening and treatment should be implemented together with other preventive components.
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Affiliation(s)
- Sivaporn Gatechompol
- HIV-NAT, Thai Red Cross AIDS Research Centre, 104 Ratchadamri Rd., Pathumwan, Bangkok, 10330, Thailand. .,Tuberculosis Research Unit, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand.
| | - Weerakit Harnpariphan
- Medical Correctional Institution, Bangkok and Klong Prem Central Prison, Bangkok, Thailand
| | - Ruamthip Supanan
- Medical Correctional Institution, Bangkok and Klong Prem Central Prison, Bangkok, Thailand
| | - Gompol Suwanpimolkul
- Tuberculosis Research Unit, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand.,King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok, Thailand.,Department of Medicine, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
| | - Jiratchaya Sophonphan
- HIV-NAT, Thai Red Cross AIDS Research Centre, 104 Ratchadamri Rd., Pathumwan, Bangkok, 10330, Thailand
| | - Sasiwimol Ubolyam
- HIV-NAT, Thai Red Cross AIDS Research Centre, 104 Ratchadamri Rd., Pathumwan, Bangkok, 10330, Thailand.,Tuberculosis Research Unit, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
| | - Stephen J Kerr
- HIV-NAT, Thai Red Cross AIDS Research Centre, 104 Ratchadamri Rd., Pathumwan, Bangkok, 10330, Thailand.,Biostatistics Excellence Centre, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
| | - Anchalee Avihingsanon
- HIV-NAT, Thai Red Cross AIDS Research Centre, 104 Ratchadamri Rd., Pathumwan, Bangkok, 10330, Thailand.,Tuberculosis Research Unit, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
| | - Kamon Kawkitinarong
- Tuberculosis Research Unit, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand.,King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok, Thailand.,Department of Medicine, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
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Sousa S, Rocha D, Silva JC, Ribeiro AI, Gonçalves G, Almeida Á, Correia AM, Duarte R, Carvalho C. Comparing the cost-effectiveness of two screening strategies for latent tuberculosis infection in Portugal. Pulmonology 2021; 27:493-499. [PMID: 34053903 DOI: 10.1016/j.pulmoe.2021.04.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2020] [Revised: 04/07/2021] [Accepted: 04/08/2021] [Indexed: 11/25/2022] Open
Abstract
INTRODUCTION AND OBJECTIVES Screening for latent tuberculosis infection (LTBI) in close contacts of infectious TB cases might include Tuberculin Skin Test (TST) and Interferon-Gamma Release Assays (IGRA), in combination or as single-tests. In Portugal, the screening strategy changed from TST followed by IGRA to IGRA-only testing in 2016. Our objective was to compare the cost-effectiveness of two-step TST/IGRA with the current IGRA-only screening strategy in immunocompetent individuals exposed to individuals with respiratory TB. MATERIALS AND METHODS We reviewed clinical records of individuals exposed to infectious TB cases diagnosed in 2015 and 2016, in two TB outpatient centers in the district of Porto. We estimated medical, non-medical and indirect costs for each screening strategy, taking into account costs of tests and health care personnel, travel distance from place of residence to screening site and employment status. We calculated the incremental cost-effectiveness ratio (ICER) as the cost difference between the two screening strategies with the difference number of LTBI diagnosis as a measure of cost-effectiveness, assuming that treating LTBI is a cost-effective intervention. We also calculated adjusted odds-ratios to test the association between diagnosis of LTBI and screening strategy and estimated the total cost for averting a potential TB case. RESULTS We compared 499 contacts TST/IGRA screened with 547 IGRA-only. IGRA-only strategy yielded a higher screening effectiveness for diagnosing latent tuberculosis infection (aOR 2.12, 95%CI: 1.53 - 2.94). ICER was €106 per LTBI diagnosis, representing increased effectiveness with a slightly increased cost of IGRA-only screening strategy. CONCLUSIONS Our data suggests that in Portugal LTBI screening with IGRA-only is more cost-effective than the two-step TST/IGRA testing strategy, preventing a higher number of cases of TB cases.
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Affiliation(s)
- Sofia Sousa
- Public Health Unit - South Sousa Valley, Northern Regional Health Administration, Paredes, Portugal; Multidisciplinary Unit for Biomedical Research (UMIB), Institute of Biomedical Sciences Abel Salazar, University of Porto, Porto, Portugal.
| | - Diogo Rocha
- Faculty of Medicine, University of Porto, Porto, Portugal
| | - Joelma C Silva
- Pulmonology Department of Centro Hospitalar de Trás-os-Montes e Alto Douro, Vila Real, Portugal
| | - Ana Isabel Ribeiro
- Epidemiology Research Unit (EpiUnit) - Institute of Public Health, University of Porto, Porto, Portugal; Departamento de Ciências de Saúde Pública, Ciências Forenses e Educação Médica, Faculty of Medicine, University of Porto, Porto, Portugal
| | - Guilherme Gonçalves
- Multidisciplinary Unit for Biomedical Research (UMIB), Institute of Biomedical Sciences Abel Salazar, University of Porto, Porto, Portugal
| | - Álvaro Almeida
- CEF.UP - Center for Economics and Finance at the University of Porto and Faculdade de Economia, Universidade do Porto
| | - Ana Maria Correia
- Northern Regional Health Administration, Department of Public Health, Porto, Portugal
| | - Raquel Duarte
- Epidemiology Research Unit (EpiUnit) - Institute of Public Health, University of Porto, Porto, Portugal; Departamento de Ciências de Saúde Pública, Ciências Forenses e Educação Médica, Faculty of Medicine, University of Porto, Porto, Portugal; Serviço de Pneumologia, Centro Hospitalar de Vila Nova de Gaia/Espinho, Vila Nova de Gaia, Portugal; National Tuberculosis Program, Directorate-General of Health, Lisbon, Portugal
| | - Carlos Carvalho
- Public Health Unit - South Sousa Valley, Northern Regional Health Administration, Paredes, Portugal; Department of Public Health, Northern Regional Health Administration, Porto, Portugal; Multidisciplinary Unit for Biomedical Research (UMIB), Institute of Biomedical Sciences Abel Salazar, University of Porto, Porto, Portugal
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11
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Winetsky D, Fox A, Nijhawan A, Rich JD. Treating Opioid Use Disorder and Related Infectious Diseases in the Criminal Justice System. Infect Dis Clin North Am 2021; 34:585-603. [PMID: 32782103 DOI: 10.1016/j.idc.2020.06.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
This article provides an overview of the diagnosis and management of opioid use disorder and its infectious complications among populations with criminal justice involvement. Opioid use disorder and chronic infections such as human immunodeficiency virus and hepatitis C virus are highly prevalent among incarcerated individuals and some of the unique features of correctional facilities present challenges for their appropriate medical management. We outline evidence-based strategies for integrated, patient-centered treatment during incarceration and the potentially hazardous transition back to the community upon release.
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Affiliation(s)
- Daniel Winetsky
- Division of Infectious Diseases, Department of Internal Medicine, Columbia University Irving Medical Center, 622 West 168th Street, PH 8 W-876, New York, NY 10032, USA; HIV Center for Clinical and Behavioral Studies at Columbia University and New York State Psychiatric Institute, New York, NY, USA.
| | - Aaron Fox
- Department of Internal Medicine, Montefiore Medical Center, 305 East 161th Street, Room 4, Bronx, NY, USA
| | - Ank Nijhawan
- Division of Infectious Diseases, Department of Internal Medicine, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390, USA
| | - Josiah D Rich
- Department of Medicine, Brown University, 164 Summit Avenue, Providence, RI 02906, USA; Department of Epidemiology, Brown University, 164 Summit Avenue, Providence, RI 02906, USA
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12
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Kaewseekhao B, Nuntawong N, Eiamchai P, Roytrakul S, Reechaipichitkul W, Faksri K. Diagnosis of active tuberculosis and latent tuberculosis infection based on Raman spectroscopy and surface-enhanced Raman spectroscopy. Tuberculosis (Edinb) 2020; 121:101916. [PMID: 32279876 DOI: 10.1016/j.tube.2020.101916] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2019] [Revised: 02/15/2020] [Accepted: 02/17/2020] [Indexed: 12/17/2022]
Abstract
Current tools for screening LTBI are limited due to the long turnaround time required, cross-reactivity of tuberculin skin test to BCG vaccine and the high cost of interferon gamma release assay (IGRA) tests. We evaluated Raman spectroscopy (RS) for serum-protein fingerprinting from 26 active TB (ATB) cases, 20 LTBI cases, 34 early clearance (EC; TB-exposed persons with undetected infection) and 38 healthy controls (HC). RS at 532 nm using candidate peaks provided 92.31% sensitivity and 90.0% to distinguish ATB from LTBI, 84.62% sensitivity and 89.47% specificity to distinguish ATB from HC and 87.10% sensitivity and 85.0% specificity to distinguish LTBI from EC. RS at 532 nm with the random forest model provided 86.84% sensitivity and 65.0% specificity to distinguish LTBI from HC and 94.74% sensitivity and 87.10% specificity to distinguish EC from HC. Using preliminary sample sets (n = 5 for each TB-infection category), surface-enhanced Raman spectroscopy (SERS) showed high potential diagnostic performance, distinguishing very clearly among all TB-infection categories with 100% sensitivity and specificity. With lower cost, shorter turnaround time and performance comparable to that of IGRAs, our study demonstrated RS and SERS to have high potential for ATB and LTBI diagnosis.
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Affiliation(s)
- Benjawan Kaewseekhao
- Department of Microbiology and Research and Diagnostic Center for Emerging Infectious Diseases, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Noppadon Nuntawong
- National Electronics and Computer Technology Center (NECTEC), National Science and Technology Development Agency (NSTDA), Rama VI Rd., Pathumthani, Thailand
| | - Pitak Eiamchai
- National Electronics and Computer Technology Center (NECTEC), National Science and Technology Development Agency (NSTDA), Rama VI Rd., Pathumthani, Thailand
| | - Sittiruk Roytrakul
- National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Rama VI Rd., Pathumthani, Thailand
| | - Wipa Reechaipichitkul
- Department of Medicine and Diagnostic Center for Emerging Infectious Diseases, Faculty of Medicine, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Kiatichai Faksri
- Department of Microbiology and Research and Diagnostic Center for Emerging Infectious Diseases, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand.
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13
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Chen G, Wang H, Wang Y. Clinical application of QuantiFERON-TB Gold in-tube in the diagnosis and treatment of tuberculosis. Eur J Clin Microbiol Infect Dis 2019; 39:607-612. [PMID: 31786694 DOI: 10.1007/s10096-019-03768-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Accepted: 11/11/2019] [Indexed: 11/25/2022]
Abstract
At present, although it has made great progress in the diagnosis and treatment of tuberculosis, tuberculosis is still an important cause of morbidity and mortality. There were approximately 8.6 million new cases of tuberculosis in 2012, and approximately 1.3 million people died from tuberculosis. Early diagnosis and timely treatment are essential for controlling the spread of tuberculosis infection and reducing mortality. Conventional methods of Mycobacterium tuberculosis detection such as acid-fast staining microscopy and tuberculin skin test are widely used, but with low sensitivity or specificity. In recent years, a newly developed quantitative test, γ-interferon release test (IGRA), has been recognized and widely applied to the early diagnosis and monitoring of tuberculosis. QuantiFERON-TB Gold in-tube (QFT-GIT) is one of the mature IGRA methods. This paper summarizes the researches on QFT-GIT in recent years and introduces its principles, methodology, clinical application, and factors of uncertain results for the diagnosis and treatment of tuberculosis.
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Affiliation(s)
- Guangming Chen
- Department of General Practice, Jinhua Municipal Central Hospital, Jinhua, People's Republic of China
| | - Huabin Wang
- Central Laboratory, Jinhua Municipal Central Hospital, Jinhua, People's Republic of China.
| | - Yanhong Wang
- Department of Laboratory Medicine, Wenzhou Medical University, Wenzhou, People's Republic of China
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14
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Erol S, Ciftci FA, Ciledag A, Kaya A, Kumbasar OO. Do higher cut-off values for tuberculin skin test increase the specificity and diagnostic agreement with interferon gamma release assays in immunocompromised Bacillus Calmette-Guérin vaccinated patients? Adv Med Sci 2018; 63:237-241. [PMID: 29427966 DOI: 10.1016/j.advms.2017.12.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2017] [Revised: 09/28/2017] [Accepted: 12/14/2017] [Indexed: 12/11/2022]
Abstract
PURPOSE Immunocompromised patients with latent tuberculosis infection (LTBI) are at high risk of progression to active tuberculosis. Detection and treatment of LTBI in this group of patients are very important to control active tuberculosis. Tuberculin skin test (TST) and interferon gamma release assays (IGRAs) are two methods for detection of LTBI. Diagnostic agreement between two tests are poor especially in Bacillus Calmette-Guérin (BCG) vaccinated immunocompromised patients. In this study, we tried to figure out if the use of a higher cut-off for TST increases diagnostic agreement with IGRAs and TST specificity and or not. MATERIALS/METHODS In this retrospective study, BCG vaccinated solid organ transplantation (SOT) candidates and patients scheduled for anti-tumor necrosis factor-alpha (anti- TNFα) treatment patients who underwent both TST and IGRAs between 2011 and 2017 were enrolled in the study. Diagnostic agreement between the two tests was assessed for 5, 10, 15mm cut-off values for all participants, SOT candidates and anti- TNFα treatment subgroups separately. RESULTS Fifty female and 55 male total 105 patients were included. In the anti- TNFα treatment group 92.8% of the patients were receiving at least one immunosuppressive drug. For all participants kappa (κ) values were 0.303, 0.370, 0.321 respectively for 5, 10 and 15mm cut-offs. For SOT candidates κ values were 0.488, 0.422, 0.288 respectively. For anti- TNFα treatment group κ values were 0.235, 0.332, 0.275 respectively. CONCLUSIONS In BCG vaccinated immunocompromised patients, the agreement between TST and QFT-GIT was poor regardless of cut-off value. And increasing the cut-off does not improve agreement.
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15
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Nijhawan AE, Iroh PA, Porsa E. Acceptability of HIV Testing Among Jail Inmates When Combined With a Blood Test for Tuberculosis. JOURNAL OF CORRECTIONAL HEALTH CARE 2018; 24:120-126. [PMID: 29544376 DOI: 10.1177/1078345818762107] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Incarcerated individuals are at high risk of HIV and tuberculosis (TB), though combined screening in the criminal justice system is limited. Newer blood tests for TB provide a unique opportunity to combine HIV and TB testing in corrections. Entering jail inmates were offered routine opt-out HIV testing along with TB screening, both via blood draw. Of the 529 individuals enrolled, 524 (99%) agreed to HIV testing. Testing identified 13 (2.5%) previously diagnosed HIV infections and one new positive. One quarter (138, 26%) of participants had never been tested for HIV and were more likely to be young, Hispanic, born outside of the United States, and incarcerated for the first time. Combined HIV/TB testing had high acceptability among individuals entering jail.
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Affiliation(s)
- Ank E Nijhawan
- 1 Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX, USA.,2 Parkland Health & Hospital System, Dallas, TX, USA
| | - Princess A Iroh
- 1 Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Esmaeil Porsa
- 3 Office of Strategy and Integration, Parkland Health & Hospital System, Dallas, TX, USA
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