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https://www.readbyqxmd.com/read/29758245/validation-and-comparison-of-elisa-kits-to-measure-interferon-gamma-responses-in-quantiferon-cultural-supernatants-for-diagnosis-of-tuberculosis
#1
Jungho Kim, Sungyoung Bong, Deok-Ryun Kim, Sang-Nae Cho, Hyejon Lee
Much effort has been made to reduce the cost of LTBI diagnosis with equivalent efficacy and efficiency of interferon-γ release assay (IGRA). This study showed that repeatability, intermediate precision, and accuracy of the Bionote-ELISA were comparable to QFT-ELISA. The Bionote-ELISA could provide the alternative method.
May 11, 2018: Journal of Microbiological Methods
https://www.readbyqxmd.com/read/29757355/a-prospective-study-to-monitor-for-tuberculosis-during-anti-tumour-necrosis-factor-therapy-in-patients-with-inflammatory-bowel-disease-and-immune-mediated-inflammatory-diseases
#2
Choon Kin Lee, Sunny H Wong, Grace Lui, Whitney Tang, Lai San Tam, Margaret Ip, Esther Hung, Minhu Chen, Justin C Wu, Siew C Ng
Background: Biologic therapies have revolutionised the treatment of immune- mediated diseases including inflammatory bowel disease (IBD) and rheumatological disorders. However, biologic treatments are associated with an increased risk of reactivation of latent tuberculosis. Data of regular monitoring for latent tuberculosis infection (LTBI) during biologic treatment are lacking. Methods: Consecutive patients eligible for biologic therapies were screened for LTBI and prospectively followed-up for 3 years...
May 11, 2018: Journal of Crohn's & Colitis
https://www.readbyqxmd.com/read/29746954/combined-ifn-%C3%AE-and-tnf-%C3%AE-release-assay-for-differentiating-active-tuberculosis-from-latent-tuberculosis-infection
#3
Ji Yeun Kim, Joung Ha Park, Min Chul Kim, Hye Hee Cha, Na-Young Jeon, Seong Yeon Park, Min-Jae Kim, Yong-Phil Chong, Sang Oh Lee, Sang-Ho Choi, Yang Soo Kim, Jun Hee Woo, Sung Han Kim
OBJECTIVES: The IFN-γ-release assay (IGRA) cannot differentiate active tuberculosis (TB) from latent TB infection (LTBI). We hypothesized that the TNF-α-release assay (TARA) combined with IGRA might discriminate active TB from not active TB without LTBI. METHODS: Adult patients with suspected TB, and with unrelated diseases such as herpes zoster as controls, were enrolled in an intermediate TB-burden country. Patients with confirmed or probable TB were regarded as active TB, and patients with not active TB were further classified as those having not active TB with and without LTBI based on IGRA results...
May 7, 2018: Journal of Infection
https://www.readbyqxmd.com/read/29743310/comparison-of-the-quantiferon-tb-gold-plus-and-quantiferon-tb-gold-in-tube-interferon-%C3%AE-release-assays-in-patients-at-risk-for-tuberculosis-and-in-healthcare-workers
#4
Elitza S Theel, Heather Hilgart, Margaret Breen-Lyles, Kevin McCoy, Rhiannon Flury, Laura E Breeher, John Wilson, Irene G Sia, Jennifer A Whitaker, Jeremy Clain, Timothy R Aksamit, Patricio Escalante
The QuantiFERON-TB Gold Plus (QFT-Plus; Qiagen, Germantown, MD) interferon-gamma release assay (IGRA) received FDA-clearance in 2017 and will replace the prior version of the assay, the QFT-Gold In Tube (QFT-GIT). Here, we compared performance of the QFT-Plus assay to the QFT-GIT version in a diverse patient population, including patients undergoing evaluation for or follow-up of latent tuberculosis infection (LTBI; n=39) or active TB (n=3), and in healthcare workers (HCWs; n=119) at Mayo Clinic (Rochester, MN)...
May 9, 2018: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/29735171/high-rates-of-tuberculin-skin-test-positivity-due-to-methotrexate-therapy-false-positive-results
#5
Miguel Arias-Guillén, Marta M Sánchez Menéndez, Mercedes Alperi, Sabino Riestra-Menéndez, María Teresa González Budiño, Marta María García-Clemente, Susana Martínez-González, Ana Isabel Enríquez, Rebeca Alonso-Arias, Juan José Palacios Gutiérrez, Miguel Santibáñez, Pablo Coto-Segura, Pablo Martínez Camblor, Lucía García-Alfonso, Isla Morante, Patricio Escalante
RATIONALE: The tuberculin skin test (TST) and interferon γ release assays (IGRAs) are commonly used for latent tuberculosis infection (LTBI) screening. Unexpectedly high TST positivity rates have been reported in patients with rheumatic diseases, and methotrexate is frequently used in this population. We hypothesized that methotrexate use could be associated with false-positive TST results. OBJECTIVES: To investigate whether treatment with methotrexate and other factors are associated with false-positive TST results in patients with rheumatic diseases...
March 29, 2018: Seminars in Arthritis and Rheumatism
https://www.readbyqxmd.com/read/29731933/latent-tuberculosis-infection-diagnosis-and-treatment
#6
Biljana Ilievska-Poposka, Marija Metodieva, Maja Zakoska, Cveta Vragoterova, Dejan Trajkov
INTRODUCTION: Latent tuberculosis infection (LTBI) is defined as a state of persistent immune response to stimulation by Mycobacterium tuberculosis antigens without evidence of clinically manifested active tuberculosis (TB). Diagnosis and treatment for LTBI are important for TB, especially in high-risk populations. Tuberculin skin test (TST) and interferon-gamma release assays (IGRAs) are used to diagnose LTBI. AIM: The study aims to present the first results with IGRA test compared with TST in the screening of LTBI and the treatment results in the cases with LTBI in Macedonia...
April 15, 2018: Open Access Macedonian Journal of Medical Sciences
https://www.readbyqxmd.com/read/29728429/interferon-%C3%AE-release-assay-performance-for-tuberculosis-in-childhood
#7
Alexander W Kay, Shamim M Islam, Kristen Wendorf, Janice Westenhouse, Pennan M Barry
BACKGROUND: Interferon-γ release assays (IGRAs) are important adjunctive tests for diagnosing tuberculosis (TB) disease in children. METHODS: We analyzed California TB registry data for patients ≤18 years with laboratory-confirmed TB disease during 2010-2015 to identify case characteristics associated with test selection and performance and measure IGRA sensitivity. RESULTS: In total, 778 cases of TB were reported; 360 were laboratory confirmed...
May 4, 2018: Pediatrics
https://www.readbyqxmd.com/read/29721337/influence-of-seasonality-and-circulating-cytokines-on-serial-quantiferon-discordances
#8
Marsha L Griffin, Saroochi Agarwal, Melissa Zhu Murphy, Larry D Teeter, Edward A Graviss
Objectives. An 18-month prospective study serially tested healthcare workers (HCWs) for tuberculosis infection (TBI) and reported discordant QuantiFERON Gold In-Tube® (QFT) results in some participants. The purpose of the current study was to investigate whether the interferon-gamma (IFN- γ ) measured by QFT in discordant individuals could be influenced by other circulating cytokines that vary seasonally at the time of phlebotomy. Methods. The CDC funded TBESC Task Order 18 (TO18) project to assess the use of Interferon Gamma Release Assays (IGRAs), T-SPOT...
2018: Tuberculosis Research and Treatment
https://www.readbyqxmd.com/read/29718223/outcomes-of-treatment-for-latent-tuberculosis-infection-in-patients-with-inflammatory-bowel-disease-receiving-biologic-therapy
#9
Guilherme P Ramos, Gregory Stroh, Badr Al-Bawardy, William A Faubion, Konstantinos A Papadakis, Patricio Escalante
Background: Treatment for latent tuberculosis infection (LTBI) is of particular concern in patients with inflammatory bowel disease (IBD) initiating biologic therapies to prevent tuberculosis (TB) reactivation. This study aimed to evaluate the effectiveness of LTBI treatment in IBD patients receiving biologic therapy. Methods: There was a retrospective review of all IBD patients diagnosed with LTBI following a tuberculin skin test (TST) and/or interferon gamma release assay (IGRA) and who received biologic therapy between 2002 and 2016...
April 26, 2018: Inflammatory Bowel Diseases
https://www.readbyqxmd.com/read/29717989/-screening-for-tuberculosis-before-tnf%C3%AE-treatment-in-routine-rheumatic-care-in-iceland-result-from-the-nationwide-icebio-registry
#10
Thorir Mar Bjorgulfsson, Gerdur Gröndal, Thorsteinn Blondal, Bjorn Gudbjornsson
INTRODUCTION: Treatment with TNFα inhibitors (TNFαi) greatly increases the risk of reactivation of tuberculosis in rheumatic patients. Therefore, it is recommended to screen patients for tuberculosis before initiating TNFαi treatment. Iceland has a low prevalence of tuberculosis and BCG vaccination is not routine praxis. The purpose of this study was to review the results from TB-screening in routine praxis and to analyze whether changes in the screening process are to be recommended...
May 2018: Læknablađiđ
https://www.readbyqxmd.com/read/29701391/diagnostic-challenges-in-chronic-constrictive-pericarditis
#11
Ana Braga, Afonso Oliveira, Kevin Domingues, Maria João Andrade, Miguel Abecacis, José Pedro Neves
INTRODUCTION: Chronic constrictive pericarditis (CCP) is a disease that has multiple possible causes and is associated with variable clinical findings, depending on its severity. It develops insidiously, and in many cases, particularly in developed countries, no antecedent diagnosis can be found. These cases are termed idiopathic. Tuberculosis is the leading cause of constrictive pericarditis in developing nations but represents only a small minority in developed countries. METHODS: Here the authors describe two different case reports where tuberculosis was the probable cause of CCP...
July 2017: Revista Portuguesa de Cirurgia Cardio-torácica e Vascular
https://www.readbyqxmd.com/read/29695324/detection-of-mycobacterium-bovis-infection-in-african-buffaloes-syncerus-caffer-using-quantiferon-%C3%A2-tb-gold-qft-tubes-and-the-qiagen-cattletype-%C3%A2-ifn-gamma-elisa
#12
Netanya Bernitz, Charlene Clarke, Eduard O Roos, Wynand J Goosen, David Cooper, Paul D van Helden, Sven D C Parsons, Michele A Miller
African buffaloes (Syncerus caffer) are wildlife maintenance hosts of Mycobacterium bovis, the cause of bovine tuberculosis. Consequently, M. bovis infected buffaloes pose a transmission risk for cattle and other wildlife species. Previously, a modification to the Qiagen QuantiFERON® -TB Gold (QFT) system, using QFT tubes and an in-house bovine interferon-gamma (IFN-γ) ELISA, was evaluated for the detection of M. bovis infection in buffaloes. Subsequently, Qiagen has developed a commercially available cattletype® IFN-gamma ELISA for the detection of antigen-specific IFN-γ release in ruminants...
February 2018: Veterinary Immunology and Immunopathology
https://www.readbyqxmd.com/read/29688161/brain-injured-survivors-of-monochorionic-twin-pregnancies-complicated-by-single-intrauterine-death-mr-findings-in-a-multicenter-study
#13
Giorgio Conte, Andrea Righini, Paul D Griffiths, Mariangela Rustico, Mariano Lanna, Fiona L Mackie, Lorenzo Pinelli, Federico Prefumo, Nicola Persico, Mark S Igra, Cecilia Parazzini, Chiara Doneda, Anna Fichera, Claudia Ambrosi, Mark Kilby, Mariasavina Severino, Fabio Triulzi, Andrea Rossi, Nicholas Skipper
Purpose To describe and classify the range of brain injuries present at prenatal, in-utero magnetic resonance (MR) imaging in co-twin survivors of monochorionic (MC) twin pregnancies complicated by single intrauterine death (SIUD). Materials and Methods This retrospective, observational study from six tertiary fetal medicine centers that perform tertiary-level prenatal in-utero MR studies reviewed cases in which prenatal in-utero MR imaging had shown a brain injury in a surviving co-twin of a twin pregnancy with a MC component complicated by SIUD...
April 24, 2018: Radiology
https://www.readbyqxmd.com/read/29660203/mycobacterium-tuberculosis-active-disease-and-latent-infection-in-a-renal-transplant-cohort
#14
Nastaran Rafiei, Jackie Williams, William R Mulley, James M Trauer, Grant A Jenkin, Benjamin A Rogers
BACKGROUND: Tuberculosis (TB) is a serious opportunistic infection in renal transplant recipients associated with high mortality. Screening and treatment of latent Mycobacterium tuberculosis infection (LTBI) offers an opportunity to prevent subsequent active disease. METHODS: We retrospectively reviewed the records of all adult patients who underwent renal transplantation at our centre from 2005 to 2014 to assess current screening practices, the risks for and burden of active TB...
April 16, 2018: Nephrology
https://www.readbyqxmd.com/read/29642833/-management-and-treatment-difficulties-of-multi-drug-resistant-pulmonary-tuberculosis-in-a-pediatric-case
#15
Selda Hançerli Törün, Emine Manolya Acar, Ayper Somer, Gonca Erköse, Dilek Şatana, Zuhal Bayramoğlu, Emine Çalışkan, Zeki Kılıçaslan
Tuberculosis continues to be a major health problem worldwide. Multidrug resistant tuberculosis (MDR-TB) infection that occurs in childhood is caused by adult MDR-TB agents which are in circulation and resistant to primary drugs. In this case report a 17-month-old child with MDR-TB who was cured after a 24-month therapy regimen was presented. Physical examination of a 17-month-old girl admitted to the hospital with the cause of recurrent pneumonia revealed a rubbery lymphadenopathy less than 2 cm in the right upper cervical region...
January 2018: Mikrobiyoloji Bülteni
https://www.readbyqxmd.com/read/29620541/screening-of-latent-tuberculosis-infection-among-health-care-workers-working-in-hajj-pilgrimage-area-in-saudi-arabia-using-interferon-gamma-release-assay-and-tuberculin-skin-test
#16
Zakeya A Bukhary, Soliman M Amer, Magdy M Emara, Mohammad E Abdalla, Sahar A Ali
BACKGROUND: Interferon gamma release assays (IGRA) is highly specific for Mycobacterium tuberculosis and is the preferred test in BCG-vaccinated individuals. The few studies that have screened health care workers (HCWs) in Saudi Arabia for latent tuberculosis infection (LTBI) using IGRA have varied in agreement with the traditional tuberculin skin test (TST). OBJECTIVE: Assess the prevalence of LTBI among HCWs working in the Hajj pilgrimage using IGRA and TST and measuring their agreement...
March 2018: Annals of Saudi Medicine
https://www.readbyqxmd.com/read/29590130/private-sector-tuberculosis-prevention-in-the-us-characteristics-associated-with-interferon-gamma-release-assay-or-tuberculin-skin-testing
#17
Erica L Stockbridge, Thaddeus L Miller, Erin K Carlson, Christine Ho
OBJECTIVE: To determine whether latent tuberculosis infection risk factors are associated with an increased likelihood of latent tuberculosis infection testing in the US private healthcare sector. DATA SOURCE: A national sample of medical and pharmacy claims representing services rendered January 2011 through December 2013 for 3,997,986 commercially insured individuals in the US who were 0 to 64 years of age. STUDY DESIGN: We used multivariable logistic regression models to determine whether TB/LTBI risk factors were associated with an increased likelihood of Interferon-Gamma Release Assay (IGRA) or Tuberculin Skin Test (TST) testing in the private sector...
2018: PloS One
https://www.readbyqxmd.com/read/29589578/universal-screening-for-latent-and-active-tuberculosis-tb-in-asylum-seeking-children-bochum-and-hamburg-germany-september-2015-to-november-2016
#18
Maya Mueller-Hermelink, Robin Kobbe, Benedikt Methling, Cornelius Rau, Ulf Schulze-Sturm, Isa Auer, Frank Ahrens, Folke Brinkmann
BackgroundIn Germany, the incidence of tuberculosis (TB) in children has been on the rise since 2009. High numbers of foreign-born asylum seekers have contributed considerably to the disease burden. Therefore, effective screening strategies for latent TB infection (LTBI) and active TB in asylum seeking children are needed. Aim: Our aim was to investigate the prevalence of LTBI and active TB in asylum seeking children up to 15 years of age in two geographic regions in Germany. Methods: Screening for TB was performed in children in asylum seeker reception centres by tuberculin skin test (TST) or interferon gamma release assay (IGRA)...
March 2018: Euro Surveillance: Bulletin Européen sur les Maladies Transmissibles, European Communicable Disease Bulletin
https://www.readbyqxmd.com/read/29580276/indicators-for-prediction-of-mycobacterium-tuberculosis-positivity-detected-with-bronchoalveolar-lavage-fluid
#19
Xi Liu, Xing-Fang Hou, Lei Gao, Guo-Fang Deng, Ming-Xia Zhang, Qun-Yi Deng, Tao-Sheng Ye, Qian-Ting Yang, Bo-Ping Zhou, Zhi-Hua Wen, Hai-Ying Liu, Hardy Kornfeld, Xin-Chun Chen
BACKGROUND: The diagnosis of active pulmonary tuberculosis (TB) remains a challenge in clinic, especially for sputum negative pulmonary TB. Bronchoalveolar lavage fluid (BALF) has higher sensitivity than sputum for detection of Mycobacterium tuberculosis (Mtb). However, bronchoscopy is invasive and costly, and not suitable for all patients. In order to make TB patients get more benefit from BALF for diagnosis, we explore which indicator might be used to optimize the choice of bronchoscopy...
March 24, 2018: Infectious Diseases of Poverty
https://www.readbyqxmd.com/read/29579857/cytomegalovirus-infection-monitoring-based-on-interferon-gamma-release-assay-in-kidney-transplantation
#20
M D C De Gracia-Guindo, M D C Ruiz-Fuentes, P Galindo-Sacristán, J M Osorio-Moratalla, N Ruiz-Fuentes, J Rodriguez Granger, A Osuna-Ortega
BACKGROUND: Cytomegalovirus (CMV) is the most common viral infection after kidney transplantation and is associated with significant morbidity and mortality. Recent studies showed that CMV-specific CD8+ T cells play the crucial role in protection against CMV. The Quantiferon-CMV (QF-CMV) is an interferon gamma (IFN-γ) release assay (IGRA test) that measures the IFN-γ response to a range of T-cell epitopes of CMV. In the present study, we analyzed the clinical utility of QF-CMV assay to predict CMV infection in kidney transplant recipients and evaluated if reactive result in QF-CMV test could be predictor of the duration of treatment...
March 2018: Transplantation Proceedings
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