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Integration of cytopathology with molecular tests to improve the lab diagnosis for TBLN suspected patients. PLoS One 2022; 17:e0265499. [PMID: 35358212 PMCID: PMC8970391 DOI: 10.1371/journal.pone.0265499] [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: 11/05/2021] [Accepted: 03/02/2022] [Indexed: 11/25/2022] Open
Abstract
Background Tuberculosis lymphadenitis (TBLN) diagnosis is often challenging in most resource poor settings. Often cytopathologic diagnosis of TBLN suspected patients is inconclusive impeding timely clinical management of TBLN suspected patients, further exposing suspected patients either for unnecessary use of antibiotics or empirical treatment. This may lead to inappropriate treatment outcome or more suffering of suspected patients from the disease. In this study, an integrated diagnostic approach has been evaluated to elucidate its utility in the identification of TBLN suspected patients. Methods A cross-sectional study was conducted on 96 clinically diagnosed TBLN suspected patients, where fine needle aspirate (FNA) samples were collected at the time of diagnosis. FNA cytology, Ziehl-Neelsen (ZN), Auramine O (AO) staining, GeneXpert MTB/RIF and Real time PCR (RT-PCR) were performed on concentrated FNA samples. Considering culture as a gold standard, the sensitivity, specificity, positive and negative predictive values were calculated. Cohen’s Kappa value was used to measure interrater variability and level of agreement and a P-value of <0.05 was considered as statistically significant. Result Out of the 96 FNA sample, 12 (12.5%) were identified to have Mycobacterium tuberculosis (Mtb) using ZN staining, 27 (28.1%) using AO staining, 51 (53.2%) using FNAC, 43 (44.7%) using GeneXpert MTB/RIF, 51 (53.1%) using Real time PCR (RT-PCR) and 36 (37.5%) using Lowenstein-Jensen (LJ) culture. Compared to LJ culture, the sensitivities of GeneXpert MTB/RIF, RT-PCR, and FNAC were 91.7%, 97.2%, and 97.2%, respectively and the specificities were 83.3%, 73.3%, and 68.3%, respectively. GeneXpert MTB/RIF and RT-PCR when combined with FNAC detected 61 (63.5%) cases as having Mtb, and the sensitivity and specificity was 100% and 58.3%, respectively. Conclusion FNA cytology and RT-PCR detected more TBLN cases compared to other Mtb detection tools and the detection sensitivity even improved when FNA cytology was combined with GeneXpert MTB/RIF, performed on concentrated FNA sample, suggesting the combined tests as an alternative approach for improved diagnosis of TBLN.
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Plonowska‐Hirschfeld KA, Fung M, Glastonbury C, Ha PK. Parapharyngeal tuberculoid mass: A rare complication of Bacillus Calmette-Guérin therapy for urothelial carcinoma in situ. Clin Case Rep 2021; 9:e04172. [PMID: 34194767 PMCID: PMC8222752 DOI: 10.1002/ccr3.4172] [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: 11/09/2020] [Revised: 02/28/2021] [Accepted: 03/27/2021] [Indexed: 01/22/2023] Open
Abstract
Local and systemic complications of Bacillus Calmette-Guérin therapy are important to recognize as they require prolonged antimicrobial therapy; molecular genomic testing may be key to diagnosis when culture data are inconclusive.
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Affiliation(s)
| | - Monica Fung
- Department of Medicine – Infectious DiseaseUniversity of California‐San FranciscoSan FranciscoCAUSA
| | - Christine Glastonbury
- Department of Otolaryngology‐Head and Neck SurgeryUniversity of California‐San FranciscoSan FranciscoCAUSA
- Department of Clinical RadiologyUniversity of California‐San FranciscoSan FranciscoCAUSA
| | - Patrick K. Ha
- Department of Otolaryngology‐Head and Neck SurgeryUniversity of California‐San FranciscoSan FranciscoCAUSA
- Division of Head and Neck Surgical OncologyDepartment of Otolaryngology‐Head and Neck SurgeryUniversity of California‐San FranciscoSan FranciscoCAUSA
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Bennani K, Khattabi A, Akrim M, Mahtar M, Benmansour N, Essakalli Hossyni L, Karkouri M, Cherradi N, El Messaoudi MD, Lahlou O, Cherkaoui I, Khader Y, Maaroufi A, Ottmani SE. Evaluation of the Yield of Histopathology in the Diagnosis of Lymph Node Tuberculosis in Morocco, 2017: Cross-Sectional Study. JMIR Public Health Surveill 2019; 5:e14252. [PMID: 31599732 PMCID: PMC6819008 DOI: 10.2196/14252] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Revised: 07/24/2019] [Accepted: 08/17/2019] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND The frequency of occurrence of extrapulmonary tuberculosis (EPTB) has been increasing globally over the last two decades. In Morocco, EPTB cases account for 46% of the patients reported with a new episode of tuberculosis (TB). Lymph node TB (LNTB) is the most common form of EPTB. In line with the guidelines of the National TB Program, the diagnosis is mainly based on clinical evidence, including histopathology. OBJECTIVE This study aimed to evaluate the yield of histopathology testing in the diagnosis of LNTB. METHODS This cross-sectional, prospective study was conducted among patients with cervical lymph node who were enrolled in the study from November 2016 to May 2017 in three regions of Morocco. We compared the outcomes of histopathological testing with those of bacteriology. Sensitivity (Se), specificity (Sp), positive predictive value (PPV), and negative predictive value (NPV) of histopathology testing were calculated. Culture and Xpert tests were used as the gold standard Laboratoty Testing. RESULTS A total of 262 patients were enrolled in this study. The Se, Sp, PPV, and NPV of histopathology testing were 95.6% (129/135), 64.6% (82/127), 74.1% (129/174), and 93.2% (82/88), respectively, in the presence of granuloma with or without caseous necrosis and were 84.4% (114/135), 74.8% (95/127), 78.1% (114/146), and 81.9% (95/116), respectively, in the presence of granuloma with caseous necrosis. The granuloma with caseous necrosis was associated with increased PPV and Sp of histopathology testing (P<.05). CONCLUSIONS The presence of the granuloma with caseous necrosis in the histopathological examination had significantly improved the yield of histopathology testing for the diagnosis of LNTB. The findings recommend to maintain histopathology testing in establishing the LNTB diagnosis and to explore other techniques to improve it.
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Affiliation(s)
- Kenza Bennani
- Direction of Epidemiology and Diseases Control, Ministry of Health, Rabat, Morocco.,Morocco Field Epidemiology Training Program, Rabat, Morocco
| | - Asmae Khattabi
- Morocco Field Epidemiology Training Program, Rabat, Morocco.,Ecole nationale de Santé publique, Rabat, Morocco
| | - Mohammed Akrim
- Morocco Field Epidemiology Training Program, Rabat, Morocco.,Ecole nationale de Santé publique, Rabat, Morocco
| | - Mohamed Mahtar
- Otorhinolaryngology Department, Hôpital du 20 Aôut, Casablanca, Morocco
| | | | | | - Mehdi Karkouri
- Histopathology Laboratory, Hôpital Ibn Rochd, Casablanca, Morocco
| | - Nadia Cherradi
- Histopathology Laboratory, Hôpital des Spécilaités, Rabat, Morocco
| | | | - Ouafae Lahlou
- Tuberculosis National Reference Laboratory, Institut national d'Hygiène, Rabat, Morocco
| | - Imad Cherkaoui
- Direction of Epidemiology and Diseases Control, Ministry of Health, Rabat, Morocco
| | - Yousef Khader
- Department of Public Health, Jordan University of Science and Technology, Amman, Jordan
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4
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Head and neck tuberculosis: Literature review and meta-analysis. Tuberculosis (Edinb) 2019; 116S:S78-S88. [DOI: 10.1016/j.tube.2019.04.014] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Accepted: 11/12/2018] [Indexed: 12/13/2022]
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5
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Dai Y, Wen Z, Ye T, Deng G, Zhang M, Deng Q, Yang Q, Shan W, Kornfeld H, Cai Y, Chen X. Empirical treatment with non-anti-tuberculosis antibiotics decreased microbiological detection in cervical tuberculous lymphadenitis. Diagn Microbiol Infect Dis 2018; 92:245-249. [PMID: 30076042 DOI: 10.1016/j.diagmicrobio.2018.06.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Revised: 05/29/2018] [Accepted: 06/10/2018] [Indexed: 01/18/2023]
Abstract
Diagnosis of cervical tuberculous lymphadenitis (CTL), the most commonly occurring form of extrapulmonary tuberculosis, remains as a challenge in clinic. Detection of the presence of Mycobacterium tuberculosis (Mtb) in fine needle aspiration cytology (FNAC) samples is one golden criterion to confirm the CTL diagnosis. Due to the non-specific clinical presentation, CTL might be confused with other lymph node enlargement diseases; therefore empirical treatment with non-anti-TB antibiotics is often initially administered. However, it is still unclear whether this diagnostic antibiotic treatment affects the positivity of Mtb detection in FNAC. The demographics and clinical characteristics of 732 lymph node enlargement patients who had underwent FNAC were retrospectively analyzed and 605 (82.65%) of them were diagnosed as CTL. A total of 279 CTL cases (279/605, 46.11%) with completion of three Mtb tests (AFB, NAAT, and Mtb culture) in FNAC samples were selected for analyzing the effect of empirical antibiotic treatment on the positivity of Mtb tests. Compared to CTL patients without antibiotic treatment prior to FNAC, patients received empirical non anti-TB treatment had significantly lower positivity for acid fast bacilli staining (adjusted OR 0.11, 95% CI 0.06-0.21), nucleic acid amplification test (NAAT) (adjusted OR 0.38, 95% CI 0.21-0.71), and Mtb culture (adjusted OR 0.11, 95% CI 0.06-0.19). In conclusion, this study demonstrated that empirical non anti-TB antibiotic treatment reduced the opportunity to confirm CTL by microbiological analysis. Patients with cervical lymph node enlargement should undergo FNAC for Mtb tests prior to initiation of empirical non anti-TB treatment.
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Affiliation(s)
- Youchao Dai
- Department of Pathogen Biology, Shenzhen University School of Medicine, Shenzhen, China; Shenzhen Key Laboratory of Infection &Immunity, Shenzhen Third People's Hospital, Shenzhen University School of Medicine, Shenzhen, China; Guangzhou Medical University, Guangzhou, China
| | - Zhihua Wen
- Yuebei Second People's Hospital, Shaoguan, China
| | - Taosheng Ye
- Shenzhen Key Laboratory of Infection &Immunity, Shenzhen Third People's Hospital, Shenzhen University School of Medicine, Shenzhen, China
| | - Guofang Deng
- Shenzhen Key Laboratory of Infection &Immunity, Shenzhen Third People's Hospital, Shenzhen University School of Medicine, Shenzhen, China
| | - Mingxia Zhang
- Shenzhen Key Laboratory of Infection &Immunity, Shenzhen Third People's Hospital, Shenzhen University School of Medicine, Shenzhen, China
| | - Qunyi Deng
- Shenzhen Key Laboratory of Infection &Immunity, Shenzhen Third People's Hospital, Shenzhen University School of Medicine, Shenzhen, China
| | - Qianting Yang
- Shenzhen Key Laboratory of Infection &Immunity, Shenzhen Third People's Hospital, Shenzhen University School of Medicine, Shenzhen, China
| | - Wanshui Shan
- Shenzhen Key Laboratory of Infection &Immunity, Shenzhen Third People's Hospital, Shenzhen University School of Medicine, Shenzhen, China
| | - Hardy Kornfeld
- Department of Medicine, University of Massachusetts Medical School, Worcester, MA 01655, USA
| | - Yi Cai
- Department of Pathogen Biology, Shenzhen University School of Medicine, Shenzhen, China
| | - Xinchun Chen
- Department of Pathogen Biology, Shenzhen University School of Medicine, Shenzhen, China.
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Babafemi EO, Cherian BP, Banting L, Mills GA, Ngianga K. Effectiveness of real-time polymerase chain reaction assay for the detection of Mycobacterium tuberculosis in pathological samples: a systematic review and meta-analysis. Syst Rev 2017; 6:215. [PMID: 29070061 PMCID: PMC5657121 DOI: 10.1186/s13643-017-0608-2] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/04/2017] [Accepted: 10/12/2017] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Rapid and accurate diagnosis of tuberculosis (TB) is key to manage the disease and to control and prevent its transmission. Many established diagnostic methods suffer from low sensitivity or delay of timely results and are inadequate for rapid detection of Mycobacterium tuberculosis (MTB) in pulmonary and extra-pulmonary clinical samples. This study examined whether a real-time polymerase chain reaction (RT-PCR) assay, with a turn-a-round time of 2 h, would prove effective for routine detection of MTB by clinical microbiology laboratories. METHODS A systematic literature search was performed for publications in any language on the detection of MTB in pathological samples by RT-PCR assay. The following sources were used MEDLINE via PubMed, EMBASE, BIOSIS Citation Index, Web of Science, SCOPUS, ISI Web of Knowledge and Cochrane Infectious Diseases Group Specialised Register, grey literature, World Health Organization and Centres for Disease Control and Prevention websites. Forty-six studies met set inclusion criteria. Generated pooled summary estimates (95% CIs) were calculated for overall accuracy and bivariate meta-regression model was used for meta-analysis. RESULTS Summary estimates for pulmonary TB (31 studies) were as follows: sensitivity 0.82 (95% CI 0.81-0.83), specificity 0.99 (95% CI 0.99-0.99), positive likelihood ratio 43.00 (28.23-64.81), negative likelihood ratio 0.16 (0.12-0.20), diagnostic odds ratio 324.26 (95% CI 189.08-556.09) and area under curve 0.99. Summary estimates for extra-pulmonary TB (25 studies) were as follows: sensitivity 0.70 (95% CI 0.67-0.72), specificity 0.99 (95% CI 0.99-0.99), positive likelihood ratio 29.82 (17.86-49.78), negative likelihood ratio 0.33 (0.26-0.42), diagnostic odds ratio 125.20 (95% CI 65.75-238.36) and area under curve 0.96. CONCLUSIONS RT-PCR assay demonstrated a high degree of sensitivity for pulmonary TB and good sensitivity for extra-pulmonary TB. It indicated a high degree of specificity for ruling in TB infection from sampling regimes. This was acceptable, but may better as a rule out add-on diagnostic test. RT-PCR assays demonstrate both a high degree of sensitivity in pulmonary samples and rapidity of detection of TB which is an important factor in achieving effective global control and for patient management in terms of initiating early and appropriate anti-tubercular therapy. SYSTEMATIC REVIEW REGISTRATION PROSPERO CRD42015027534 .
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Affiliation(s)
- Emmanuel O. Babafemi
- Microbiology Department, Pathology Division, Sandwell and West Birmingham Hospitals NHS Trust, Birmingham, UK
| | | | - Lee Banting
- School of Pharmacy and Biomedical Sciences, University of Portsmouth, Portsmouth, UK
| | - Graham A. Mills
- School of Pharmacy and Biomedical Sciences, University of Portsmouth, Portsmouth, UK
| | - Kandala Ngianga
- School of Health Sciences and Social Work, University of Portsmouth, Portsmouth, UK
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7
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Abstract
Tuberculous lymphadenitis is the most common extrapulmonary manifestation of disseminated tuberculosis (TB). It is considered to be the local manifestation of the systemic disease that has disseminated to local lymph nodes, but a high index of suspicion is needed for the diagnosis, because there are several infectious and noninfectious diseases that can mimic the same clinical picture. In recent years, different diagnostic methods have been introduced, including fine-needle aspiration cytology, which has emerged as a simple outpatient diagnostic procedure that replaced the complete excisional node biopsy, and a number of molecular methods which have greatly improved diagnostic accuracy. This chapter covers the most actual knowledge in terms of epidemiology, clinical manifestations, pathogenesis, and treatment and emphasizes current trends in diagnosis of tuberculous lymphadenitis. TB parotid gland involvement is extremely rare, even in countries in which TB is endemic. Because of the clinical similarity, parotid malignancy and other forms of parotid inflammatory disease always take priority over the rarely encountered TB parotitis when it comes to differential diagnosis. As a result, clinicians often fail to make a timely diagnosis of TB parotitis when facing a patient with a slowly growing parotid lump. This chapter highlights the most important features of this uncommon disease.
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8
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Abstract
Peripheral lymphadenopathy (scrofula) is the second most common site for childhood tuberculosis. Paradoxical reactions are commonly seen even in immunocompetent children after therapy is initiated, and this can lead to draining sinus tracts. We describe a multimodal therapeutic option of antituberculosis therapy, corticosteroids and therapeutic ultrasound-guided nodal aspiration in an adolescent with massive cervical adenopathy.
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Kirwan DE, Ugarte-Gil C, Gilman RH, Caviedes L, Rizvi H, Ticona E, Chavez G, Cabrera JL, Matos ED, Evans CA, Moore DAJ, Friedland JS. Microscopic Observation Drug Susceptibility Assay for Rapid Diagnosis of Lymph Node Tuberculosis and Detection of Drug Resistance. J Clin Microbiol 2016; 54:185-9. [PMID: 26511739 PMCID: PMC4702711 DOI: 10.1128/jcm.02227-15] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2015] [Accepted: 09/12/2015] [Indexed: 11/20/2022] Open
Abstract
In this study, 132 patients with lymphadenopathy were investigated. Fifty-two (39.4%) were diagnosed with tuberculosis (TB). The microscopic observation drug susceptibility (MODS) assay provided rapid (13 days), accurate diagnosis (sensitivity, 65.4%) and reliable drug susceptibility testing (DST). Despite its lower sensitivity than that of other methods, its faster results and simultaneous DST are advantageous in resource-poor settings, supporting the incorporation of MODS into diagnostic algorithms for extrapulmonary TB.
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Affiliation(s)
- Daniela E Kirwan
- Department of Medical Microbiology, St. George's Hospital, London, United Kingdom Infectious Diseases and Immunity, Imperial College London, London, United Kingdom
| | - Cesar Ugarte-Gil
- Infectious Diseases and Immunity, Imperial College London, London, United Kingdom Instituto de Medicina Tropical Alexander von Humboldt, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - Robert H Gilman
- Department of International Health, Johns Hopkins University, Baltimore, Maryland, USA Laboratorio de Investigación en Enfermedades Infecciosas, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - Luz Caviedes
- Laboratorio de Investigación en Enfermedades Infecciosas, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - Hasan Rizvi
- Department of Cellular Pathology, Barts Health NHS Trust, London, United Kingdom
| | - Eduardo Ticona
- Infectious Diseases and Tropical Medicine Unit, Hospital Nacional Dos de Mayo, Lima, Peru Universidad Nacional Mayor de San Marcos, Lima, Peru Universidad de San Martin de Porres, Lima, Peru
| | - Gonzalo Chavez
- Infectious Diseases and Tropical Medicine Unit, Hospital Nacional Dos de Mayo, Lima, Peru
| | - José Luis Cabrera
- Department of Pulmonology, Hospital Daniel Alcides Carrión, Callao, Peru
| | - Eduardo D Matos
- Universidad Nacional Mayor de San Marcos, Lima, Peru Infectious Diseases Unit, Hospital Nacional Arzobispo Loayza, Lima, Peru
| | - Carlton A Evans
- Infectious Diseases and Immunity, and Wellcome Trust Centre for Global Health Research, Imperial College London, London, United Kingdom IFHAD: Innovation for Health and Development, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - David A J Moore
- Laboratorio de Investigación en Enfermedades Infecciosas, Universidad Peruana Cayetano Heredia, Lima, Peru TB Centre, London School of Hygiene & Tropical Medicine, London, United Kingdom
| | - Jon S Friedland
- Infectious Diseases and Immunity, Imperial College London, London, United Kingdom
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Sensitivity and specificity of Cobas TaqMan MTB real-time polymerase chain reaction for culture-proven Mycobacterium tuberculosis: meta-analysis of 26999 specimens from 17 Studies. Sci Rep 2015; 5:18113. [PMID: 26648113 PMCID: PMC4673449 DOI: 10.1038/srep18113] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2015] [Accepted: 11/12/2015] [Indexed: 11/08/2022] Open
Abstract
Since 2010, studies on the diagnostic accuracy of COBAS TaqMan MTB (CTM) have been frequently reported with an unignorable discrepancy. The key inclusion criterion for this systematic review was original studies that could provide sufficient data for calculating the sensitivity and the specificity of CTM for M tuberculosis (TB) or M tuberculosis complex. The reference test was Mycobacterium culture. We used bivariate model for meta-analyses. Of the 201 candidate articles, we finally identified 17 eligible articles.Concerning the respiratory specimens, 1900 culture positive specimens and 20983 culture negative specimens from 15 studies were assessed. This provided the summary estimate sensitivity of 0.808 (95% CI 0.758-0.850) and the summary estimate specificity of 0.990 (95% CI 0.981-0.994). The area under curve was 0.956. The diagnostic odds ratio was 459 (95% CI 261-805, I(2) 26%). For the smear positive respiratory specimens, the sensitivity was 0.952 (95% CI 0.926-0.969) and the specificity was 0.916 (95% CI 0.797-0.968). For the smear negative respiratory specimens, the sensitivity and the specificity were 0.600 (95% CI 0.459-0.726) and 0.989 (95% CI 0.981-0.993), respectively. The diagnostic accuracy was poorer for the non-respiratory specimens, than for the respiratory specimens, but was acceptable. We believe that the information obtained from this study will aid physicians' decision making.
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11
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Lee JY. Diagnosis and treatment of extrapulmonary tuberculosis. Tuberc Respir Dis (Seoul) 2015; 78:47-55. [PMID: 25861336 PMCID: PMC4388900 DOI: 10.4046/trd.2015.78.2.47] [Citation(s) in RCA: 209] [Impact Index Per Article: 23.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2015] [Revised: 02/12/2015] [Accepted: 03/03/2015] [Indexed: 11/29/2022] Open
Abstract
Extrapulmonary tuberculosis (EPTB) constitutes about 20% of all cases of tuberculosis (TB) in Korea. Diagnosing EPTB remains challenging because clinical samples obtained from relatively inaccessible sites may be paucibacillary, thus decreasing the sensitivity of diagnostic tests. Whenever practical, every effort should be made to obtain appropriate specimens for both mycobacteriologic and histopathologic examinations. The measurement of biochemical markers in TB-affected serosal fluids (adenosine deaminase or gamma interferon) and molecular biology techniques such as polymerase chain reaction may be useful adjuncts in the diagnosis of EPTB. Although the disease usually responds to standard anti-TB drug therapy, the ideal regimen and duration of treatment have not yet been established. A paradoxical response frequently occurs during anti-TB therapy. It should be distinguished from other causes of clinical deterioration. Surgery is required mainly to obtain valid diagnostic specimens and to manage complications. Because smear microscopy or culture is not available to monitor patients with EPTB, clinical monitoring is the usual way to assess the response to treatment.
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Affiliation(s)
- Ji Yeon Lee
- Department of Internal Medicine, National Medical Center, Seoul, Korea
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12
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Geake J, Hammerschlag G, Nguyen P, Wallbridge P, Jenkin GA, Korman TM, Jennings B, Johnson DF, Irving LB, Farmer M, Steinfort DP. Utility of EBUS-TBNA for diagnosis of mediastinal tuberculous lymphadenitis: a multicentre Australian experience. J Thorac Dis 2015; 7:439-48. [PMID: 25922723 PMCID: PMC4387413 DOI: 10.3978/j.issn.2072-1439.2015.01.33] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2014] [Accepted: 12/17/2014] [Indexed: 12/23/2022]
Abstract
BACKGROUND Endobronchial ultrasound (EBUS) transbronchial needle aspiration (TBNA) is an important diagnostic procedure for the interrogation of mediastinal lymph nodes. There is limited data describing the accuracy & safety of this technique for the diagnosis of tuberculous mediastinal lymphadenitis. METHODS A multi-centre retrospective study of all EBUS-guided TBNA procedures that referred samples for mycobacteriology was performed. Results were correlated with post-procedural diagnoses after a period of surveillance and cross-checked against relevant statewide tuberculosis (TB) registries, and sensitivity and specificity was calculated. In addition, nucleic acid amplification techniques (NAAT) were assessed, and sensitivity and specificity calculated using positive mycobacterial culture as the reference gold standard. RESULTS One hundred and fifty-nine patients underwent EBUS-TBNA and had tissue referred for mycobacterial culture, of which 158 were included in the final analysis. Thirty-nine were ultimately diagnosed with TB (25%). Sensitivity of EBUS-TBNA for microbiologically confirmed tuberculous mediastinal lymphadenitis was 62% (24/39 cases). Specificity was 100%. Negative predictive value (NPV) and diagnostic accuracy for microbiologic diagnosis was 89% [95% confidence intervals (CI), 82-93%] and 91% (95% CI, 84-94%) respectively. For a composite clinicopathologic diagnosis of TB NPV and accuracy were 98% (95% CI, 93-99%) and 98% (95% CI, 95-99%) respectively. Sensitivity for NAAT was 38% (95% CI, 18-65%). CONCLUSIONS EBUS-TBNA is a safe and well tolerated procedure in the assessment of patients with suspected isolated mediastinal lymphadenitis and demonstrates good sensitivity for a microbiologic diagnosis of isolated mediastinal lymphadenitis. When culture and histological results are combined with high clinical suspicion, EBUS-TBNA demonstrates excellent diagnostic accuracy and NPV for the diagnosis of mediastinal TB lymphadenitis. We suggest EBUS-TBNA should be considered the procedure of choice for patients in whom TB is suspected.
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13
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Jönsson B, Lönnermark E, Ridell M. Evaluation of the Cobas TaqMan MTB test for detection ofMycobacterium tuberculosiscomplex. Infect Dis (Lond) 2015; 47:231-6. [DOI: 10.3109/00365548.2014.987162] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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14
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McKew GL, Dubedat SM, Chan RC. Do the eyes have it? Performance of molecular detection of tuberculosis on fresh and paraffin embedded tissues, including those with no visible tissue. J Clin Pathol 2014; 67:1104-5. [PMID: 25165037 DOI: 10.1136/jclinpath-2014-202464] [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: 11/04/2022]
Abstract
BACKGROUND Little has been published on the performance of tuberculosis PCR with respect to the quality of tissue specimens. Laboratories often receive liquid samples from fine-needle aspirates with no visible tissue for testing. The sensitivity of tuberculosis (TB) PCR on these specimens is unknown. METHODS TB PCR was compared to culture or a combination of clinical and histopathological evidence of tuberculosis; a separate analysis excluded patients with current or previous treatment. RESULTS Sixty-five patients had 81 positive samples; 69 by PCR and 43 by culture. Excluding those on treatment, 51 of 57 (89%) were PCR positive versus 43 of 61 (70%) by culture. 44 samples had 'no visible tissue' noted. Five were PCR positive; only one was culture positive. At least two samples were falsely negative. CONCLUSIONS Sensitivity of TB PCR is superior to culture on tissue. Five of seven TB cases with no visible tissue were PCR positive. The quality of the specimen deserves comment, as the two (5%) known false negatives are of concern.
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Affiliation(s)
- Genevieve L McKew
- Department of Microbiology, Royal Prince Alfred Hospital, Sydney, New South Wales, Australia Central Clinical School, School of Medicine, University of Sydney, Sydney, New South Wales, Australia
| | - Sally M Dubedat
- Department of Microbiology, Royal Prince Alfred Hospital, Sydney, New South Wales, Australia
| | - Raymond C Chan
- Department of Microbiology, Royal Prince Alfred Hospital, Sydney, New South Wales, Australia Central Clinical School, School of Medicine, University of Sydney, Sydney, New South Wales, Australia
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15
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Bloemberg GV, Voit A, Ritter C, Deggim V, Böttger EC. Evaluation of Cobas TaqMan MTB for direct detection of the Mycobacterium tuberculosis complex in comparison with Cobas Amplicor MTB. J Clin Microbiol 2013; 51:2112-7. [PMID: 23616457 PMCID: PMC3697670 DOI: 10.1128/jcm.00142-13] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2013] [Accepted: 04/17/2013] [Indexed: 11/20/2022] Open
Abstract
The Roche Cobas Amplicor MTB assay, recently replaced by the Roche Cobas TaqMan MTB assay, was one of the first commercially available assays for detection of the Mycobacterium tuberculosis complex based on nucleic acid amplification. We reported previously on the limited specificity of the Cobas Amplicor MTB assay, in particular for positive samples with an optical density at 660 nm (OD660) of <2.0. Using a selected set of respiratory samples, which were scored as false positive by the Cobas Amplicor test, we demonstrate here that the specificity of the Cobas TaqMan assay is significantly improved. In addition, our study of a set of 133 clinical samples revealed that the Cobas TaqMan MTB assay showed significantly less PCR inhibition than the Cobas Amplicor test. An overall concordance of 98.2% was observed between the two assays. In a subsequent prospective study, we evaluated the performance of the Roche Cobas TaqMan MTB assay on 1,143 clinical specimens, including respiratory (n = 838) and nonrespiratory (n = 305) specimens. Using culture as the gold standard, we found a sensitivity of 88.4% and a specificity of 98.8% for the 838 respiratory specimens, compared to a sensitivity of 63.6% and a specificity of 94.6% for the 305 nonrespiratory specimens. We conclude that the Cobas TaqMan MTB assay is a significantly improved tool for the direct detection of M. tuberculosis DNA in clinical specimens.
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