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interferon gamma release assay

Ting Xin, Xintao Gao, Hongjun Yang, Pingjun Li, Qianqian Liang, Shaohua Hou, Xiukun Sui, Xiaoyu Guo, Weifeng Yuan, Hongfei Zhu, Jiabo Ding, Hong Jia
Bovine tuberculosis (bTB) is primarily caused by infection with Mycobacterium bovis , which belongs to the Mycobacterium tuberculosis complex. The airborne route is considered the most common for transmission of M. bovis , and more than 15% of cattle with bTB shed the Mycobacterium , which can be detect by nested PCR to amplify mycobacterial mpb 70 from a nasal swab from a cow. To screen for cytokines fostering early and accurate detection of bTB, peripheral blood mononuclear cells were isolated from naturally M...
2018: Frontiers in Veterinary Science
Yi-Yi Wang, Bing-di Xie
Central nervous system (CNS) disease caused by Mycobacterium tuberculosis (MTB) is highly devastating. Tuberculous meningitis (TBM) is the most common form of CNS tuberculosis (TB). Rapid, sensitive, and affordable diagnostic tests are not available. Ziehl-Neelsen (ZN) stain has a very low sensitivity in cases of TBM, the sensitivity rates is of about 10-20%.The detection rate can be improved by taking large volume CSF samples (>6 ml) and prolonged slide examination (30 min). Culture of MTB from the CSF is slow and insufficiently sensitive...
2018: Methods in Molecular Biology
Anna Starshinova, Viacheslav Zhuravlev, Irina Dovgaluk, Alexandr Panteleev, Vera Manina, Ulia Zinchenko, Evgenia Istomina, Maria Pavlova, Piotr Yablonskiy
Background: The WHO strategy for eradication of tuberculosis (TB) by 2035 (The End TB Strategy) is aimed at an early and precise diagnosis and subsequent effective treatment of TB patients. Currently, there is no gold standard for the diagnosis of latent TB infection. This study evaluated the diagnostic capabilities of a new intradermal test using recombinant TB allergen (Diaskintest) compared with tuberculin skin test (TST) and commercial TB interferon-gamma release assays (IGRAs). Methods: A post-hoc data analysis that involved examining 860 HIV-negative, bacillus Calmette-Guérin (BCG)-vaccinated persons aged 1-65 years who visited the TB health-care institutions of Saint Petersburg to rule out or confirm an active TB was conducted from 2011 to 2016...
January 2018: International Journal of Mycobacteriology
Ai-Ling Tian, MingMin Lu, Guillermo Calderón-Mantilla, Evangelia Petsalaki, Tania Dottorini, XiaoWei Tian, YuJian Wang, Si-Yang Huang, Jun-Ling Hou, XiangRui Li, Hany M Elsheikha, Xing-Quan Zhu
BACKGROUND: The molecular structure of Fasciola gigantica 14-3-3 protein has been characterized. However, the involvement of this protein in parasite pathogenesis remains elusive and its effect on the functions of innate immune cells is unknown. We report on the cloning and expression of a recombinant F. gigantica 14-3-3 epsilon protein (rFg14-3-3e), and testing its effects on specific functions of goat peripheral blood mononuclear cells (PBMCs). METHODS: rFg14-3-3e protein was expressed in Pichia pastoris...
March 6, 2018: Parasites & Vectors
Jung Seop Eom, Insu Kim, Won-Young Kim, Eun-Jung Jo, Jeongha Mok, Mi-Hyun Kim, Kwangha Lee, Ki Uk Kim, Hye-Kyung Park, Min Ki Lee
The high background rates of positive results on the tuberculin skin test (TST) and interferon-gamma release assay (IGRA) sometimes confuse the investigation of tuberculosis (TB) contact in TB-prevalent countries, particularly in elderly contacts. The aim was to investigate the predictive value of TST and IGRA for diagnosing latent TB infection (LTBI) in elderly household contacts in South Korea.In this retrospective study, TST and IGRA results of household contacts of suspected pulmonary TB patients were reviewed according to the index patient's final diagnosis (TB group: culture-confirmed pulmonary TB, non-TB group: pulmonary disease other than TB)...
January 2018: Medicine (Baltimore)
Fabian Speth, Claas H Hinze, Susanne Andel, Thomas Mertens, Johannes-Peter Haas
BACKGROUND: The goal of this study was to apply the varicella zoster virus (VZV) vaccine to patients with pediatric rheumatic diseases (PRD) at risk for severe chickenpox, without interrupting their current immunosuppression, including biological agents, using an immunological-based pre-vaccination checklist to assure safety. A pre-vaccination checklist was implemented to ensure adequate immune competence prior to immunization. METHODS: This prospective study included seronegative patients (VZV-IgG ≤200 mIU/ml) and patients who had previously received only a single dose of VZV vaccine...
March 2, 2018: Pediatric Rheumatology Online Journal
Romain Freund, Benjamin Granger, Cécile Francois, Guislaine Carcelain, Philippe Ravaud, Xavier Mariette, Bruno Fautrel
Several tests have been proposed to detect latent tuberculosis (LTB). OBJECTIVE: To evaluate the cost-effectiveness of different interferon-gamma release assays based strategies used to screen LTB before tumour necrosis factor (TNF) blockers initiation. METHODS: Consecutive patients with rheumatoid arthritis, spondyloarthritis or Crohn's disease for whom TNF-blockers were considered, were recruited in 15 tertiary care centres. All were screened for LTB with tuberculin skin test (TST), QuantiFERON TB Gold® in tube (QFT) and T-SPOT...
February 22, 2018: La Presse Médicale
Takele Teklu, Mengistu Legesse, Girmay Medhin, Aboma Zewude, Mahlet Chanyalew, Martha Zewdie, Biniam Wondale, Milkessa Haile-Mariam, Rembert Pieper, Gobena Ameni
BACKGROUND: Research pertaining to the community-based prevalence of latent tuberculosis infection (LTBI) is important to understand the magnitude of this infection. This study was conducted to estimate LTBI prevalence and to identify associated risk factors in the Omo Zone of Southern Ethiopia. METHODS: A community-based cross-sectional study was conducted in six South Omo districts from May 2015 to February 2016. The sample size was allocated to the study districts proportional to their population sizes...
February 17, 2018: BMC Public Health
Chris Elliot, Ben Marais, Phoebe Williams, Paul Joshua, Sherri Towle, Graham Hart, Karen Zwi
AIM: The aim of this study was to assist clinicians evaluating refugee children for latent tuberculosis infection (LTBI) by comparing paired tuberculin skin test (TST) and Quantiferon Gold In-Tube (QGIT) test results with clinical management decisions and follow-up data in a large cohort of newly arrived refugee children. METHODS: This was a retrospective analysis of all refugee children (<15 years of age) evaluated for LTBI with both TST and interferon-γ release assay between 2007 and 2010 in the Illawarra-Shoalhaven region of New South Wales, Australia...
February 14, 2018: Journal of Paediatrics and Child Health
Serhat Erol, Fatma Arslan Ciftci, Aydin Ciledag, Akin Kaya, Ozlem Ozdemir Kumbasar
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...
February 7, 2018: Advances in Medical Sciences
An Wen, Xin-Hui Qu, Kun-Nan Zhang, Er-Ling Leng, Yue Ren, Xiao-Mu Wu
AIMS: In this study, we conducted a meta-analysis to systematically compare the diagnostic accuracy of IGRAs performed for extrasanguinous body fluids with that performed for blood in the diagnosis of TB. MAIN METHODS: Multiple English and Chinese databases were searched up to November 2017. Studies that complied with the guidelines for the Quality Assessment of Diagnostic Accuracy Studies and used QuantiFERON-TB Gold In-Tube and/or T-SPOT.TB (ELISPOT) assays on both blood and extrasanguinous body fluids were included...
March 15, 2018: Life Sciences
Shirin Sayyahfar, Faranak Davoodzadeh, Rozita Hoseini, Nahid Rahimzadeh, Hasan Otukesh
IGRA has been approved as an alternative in vitro test to diagnose Mycobacterium TB infection. This study aimed to assess the diagnostic value of TST in comparison with QFT assay to detect LTBI among Iranian children candidate for renal transplantation. This cross-sectional study was performed on 31 children who were candidate for renal transplantation admitted to Ali Asghar Children's Hospital and Rasoul Akram Hospital, Tehran, Iran, from 2013 to 2014. TST and QFT were performed for all patients. QFT was negative in all patients, while TST was positive only in one case...
March 2018: Pediatric Transplantation
Mirtha Gabriela Soto Cabezas, Cesar Vladimir Munayco Escate, Jaime Chávez Herrera, Sonia Llanet López Romero, David Moore
To evaluate the risk of tuberculosis (TB) infection, the General Directorate of Epidemiology of the Ministry of Health developed a sentinel surveillance system in health centers located in the Constitutional Province of Callao. This surveillance system included the diagnosis of latent tuberculosis infection (LTI) using interferon gamma release assays. The objective of the present study was to estimate the prevalence of LTI in health workers in a region with a high burden of TB. The prevalence of LTI in health workers was 56%...
October 2017: Revista Peruana de Medicina Experimental y Salud Pública
Wan-Li Kang, Gui-Rong Wang, Mei-Ying Wu, Kun-Yun Yang, A Er-Tai, Shu-Cai Wu, Shu-Jun Geng, Zhi-Hui Li, Ming-Wu Li, Liang Li, Shen-Jie Tang
BACKGROUND: Interferon-gamma release assay (IGRA) has been used in latent tuberculosis (TB) infection and TB diagnosis, but the results from different high TB-endemic countries are different. The aim of this study was to investigate the value of IGRA in the diagnosis of active pulmonary TB (PTB) in China. METHODS: We conducted a large-scale retrospective multicenter investigation to further evaluate the role of IGRA in the diagnosis of active PTB in high TB-epidemic populations and the factors affecting the performance of the assay...
February 5, 2018: Chinese Medical Journal
Jonathan Hand, Keith Sigel, Shirish Huprikar, Camille Hamula, Meena Rana
INTRODUCTION: Pre-transplant screening for latent tuberculosis (TB) infection (LTBI) is a complex consideration that varies by institution. Inconsistent performance of interferon gamma release assay (IGRA) further complicates screening. Data regarding LTBI screening outcomes and test characteristics in large, foreign-born pre-transplant populations within the United States (US) is limited. METHODS: In this retrospective study, patients who received QuantiFERON® -TB Gold (QFT) prior to liver transplantation (LT) were included...
January 23, 2018: Transplant Infectious Disease: An Official Journal of the Transplantation Society
Linchuan Wang, Xu-Dong Tian, Yan Yu, Wei Chen
OBJECTIVES: The IGRA-ELISA and T-SPOT.TB are widely used in China. The aim of the study was to evaluate the performance of the two assays in diagnosis Mycobacterium tuberculosis infection. METHODS: Of the 3727 patients in the study, 204 underwent testing using both the T-SPOT.TB and IGRA-ELISA, 1794 were tested using the T-SPOT.TB only, and 1729 were tested using the IGRA-ELISA only. The positive rate and consistency of the two assays were analyzed, and their sensitivity and specificity for diagnosing active tuberculosis were compared...
April 2018: Clinica Chimica Acta; International Journal of Clinical Chemistry
Tina Boortalary, Kanchan Misra, Sean McNish, Derek Jones, Victoria K Shanmugam
AIM: Hidradenitis suppurativa (HS) is a chronic, recurrent, inflammatory disease of the apocrine sweat glands. Tumor necrosis factor-alpha (TNF-α) inhibitors are commonly used to treat HS. However, prior to initiating therapy patients must be screened for mycobacterium tuberculosis (mTB) exposure. Several mTB screening tests based on interferon gamma release assays are commercially available, but the performance of these assays in the HS population is unknown. The purpose of this study was to investigate the performance of the QuantiFERON gold in-tube assay (QFT-GIT) in a cohort of patients with HS...
January 22, 2018: Journal of Dermatological Treatment
José Domínguez, Irene Latorre, Miguel Santin
Detection and treatment of latent tuberculosis infection (LTBI) is an essential measure for tuberculosis (TB) control in low-incidence countries. However, such strategy is limited by the low predictive ability of the diagnostic tests for the development of active TB among infected people and the long-term and toxic treatment regimens. The in vitro interferon-gamma release assays are more specific and sensitive than the tuberculin skin test (TST), and enable a better selection of cases requiring treatment. Nonetheless, their capacity to predict development of TB is still poor...
December 30, 2017: Enfermedades Infecciosas y Microbiología Clínica
Junhee Pyo, Soo-Kyung Cho, Dam Kim, Yoon-Kyoung Sung
Background/Aims: To estimate the level of agreement and positivity rates of latent tuberculosis infection (LTBI) tests prior to the use of tumor necrosis factor (TNF) inhibitors in relation to underlying rheumatic diseases and endemic tuberculosis levels. Methods: The Ovid-Medline, Embase, and Cochrane Libraries were searched for articles before October 2013 involving LTBI screening in rheumatic patients, including rheumatoid arthritis (RA), ankylosing spondylitis (AS), juvenile idiopathic arthritis (JIA), and psoriatic arthritis...
December 28, 2017: Korean Journal of Internal Medicine
Marie-Luise Decker, Verena Gotta, Sven Wellmann, Nicole Ritz
Cytokine-based diagnostic assays are increasingly used in research and clinical practice. Assays developed for adults such as the interferon-gamma release assay for tuberculosis show inferior performance in children. Limited evidence suggests that release of cytokines is influenced by age but normal ranges of cytokines in children are lacking. Whole blood of healthy children (0-12 years) undergoing elective/diagnostic procedures was stimulated with SEB, PHA, Candida albicans for 24 hours or left unstimulated...
December 19, 2017: Scientific Reports
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