نتایج جستجو برای: gamma release tests

تعداد نتایج: 658394  

Journal: :Clinical and vaccine immunology : CVI 2009
Xinchun Chen Qianting Yang Mingxia Zhang Michael Graner Xiuyun Zhu Nicolas Larmonier Mingfeng Liao Weiye Yu Qunyi Deng Boping Zhou

Gamma interferon (IFN-gamma) release assays have been proven to be useful in the diagnosis of Mycobacterium tuberculosis infection. Nevertheless, their specificity and sensitivity vary among the different populations studied. Here, we evaluate the value of an in-house IFN-gamma enzyme-linked immunospot (ELISPOT) assay in the diagnosis of active tuberculosis (TB) in Shenzhen, China, where the pr...

2014
H. Esmail C. E. Barry D. B. Young R. J. Wilkinson

The global health community has set itself the task of eliminating tuberculosis (TB) as a public health problem by 2050. Although progress has been made in global TB control, the current decline in incidence of 2% yr(-1) is far from the rate needed to achieve this. If we are to succeed in this endeavour, new strategies to reduce the reservoir of latently infected persons (from which new cases a...

2014
Paola Piccini Elena Chiappini Enrico Tortoli Maurizio de Martino Luisa Galli

The ongoing spread of tuberculosis (TB) in poor resource countries and the recently increasing incidence in high resource countries lead to the need of updated knowledge for clinicians, particularly for pediatricians. The purpose of this article is to provide an overview on the most important peculiarities of TB in children. Children are less contagious than adults, but the risk of progression ...

Journal: :Clinical therapeutics 2012
Elena Chiappini Francesca Fossi Francesca Bonsignori Sara Sollai Luisa Galli Maurizio de Martino

BACKGROUND Interferon-γ release assays (IGRAs), including the commercially available T-SPOT.TB, QuantiFERON-TB Gold (QFT-G), and QuantiFERON-TB Gold In-Tube (QTF-G-IT), enable detection of circulating T lymphocytes responsive to specific Mycobacterium tuberculosis antigens. Studies of the potential role of serial IGRAs for assessment of response to anti-tubercular therapy are accumulating. OB...

2014
S Sollai L Galli M de Martino E Chiappini

BACKGROUND Previous meta-analyses regarding the performance of interferon-gamma release assays (IGRAs) for tuberculosis diagnosis in children yielded contrasting results, probably due to different inclusion/exclusion criteria. METHODS We systematically searched PubMed, EMBASE and Cochrane databases and calculated pooled estimates of sensitivities and specificities of QuantiFERON-TB Gold In Tu...

2017
Jonathon R Campbell James C Johnston Mohsen Sadatsafavi Victoria J Cook R Kevin Elwood Fawziah Marra

BACKGROUND The majority of tuberculosis in migrants to Canada occurs due to reactivation of latent TB infection. Risk of tuberculosis in those with latent tuberculosis infection can be significantly reduced with treatment. Presently, only 2.4% of new migrants are flagged for post-landing surveillance, which may include latent tuberculosis infection screening; no other migrants receive routine l...

Journal: :Trends in molecular medicine 2007
Peter Andersen T Mark Doherty Madhukar Pai Karin Weldingh

In humans, Mycobacterium tuberculosis persists for long periods in a clinically latent state, creating a huge reservoir of 'silent' tuberculosis (TB) (roughly one-third of the global population) from which new cases continually arise. A prognostic marker for active TB would enable targeted treatment of the small fraction of infected individuals who are most at risk of developing contagious TB, ...

2010
Anja Schablon Melanie Harling Roland Diel Albert Nienhaus

BACKGROUND Healthcare workers are still recognised as a high-risk group for latent TB infection (LTBI). Therefore, the screening of people employed in the healthcare sector for active and LTBI is fundamental to infection control programmes in German hospitals. It was the aim of the study to determine the prevalence and putative risk factors of LTBI. METHODS We tested 2028 employees in the hea...

2015
Bella Mehta Ekaterini Zapantis Olga Petryna Petros Efthimiou

Objective. Rheumatoid arthritis (RA) patients are at increased risk of latent tuberculosis infection (LTBI) but there are no clear guidelines for LTBI screening with Tuberculin Skin Test (TST) or Quantiferon TB Gold testing (QFT-G). Methods. A retrospective study was conducted in a high risk, largely foreign-born, inner city, RA population. After screening 280 RA patients, 134 patients who had ...

2015
Hinta Meijerink Rudi Wisaksana Mery Lestari Intan Meilana Lydia Chaidir Andre JAM van der Ven Bachti Alisjahbana Reinout van Crevel

INTRODUCTION Injecting drug use (IDU) is associated with tuberculosis but few data are available from low-income settings. We examined IDU in relation to active and latent tuberculosis (LTBI) among HIV-positive individuals in Indonesia, which has a high burden of tuberculosis and a rapidly growing HIV epidemic strongly driven by IDU. METHODS Active tuberculosis was measured prospectively amon...

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