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https://www.readbyqxmd.com/read/29161328/use-of-quantiferon%C3%A2-tb-gold-in-tube-culture-supernatants-for-measurement-of-antibody-responses
#1
Simon G Kimuda, Irene Andia-Biraro, Moses Egesa, Bernard S Bagaya, John G Raynes, Jonathan Levin, Alison M Elliott, Stephen Cose
QuantiFERON®-TB Gold in-tube (QFT-GIT) supernatants may be important samples for use in assessment of anti-tuberculosis (TB) antibodies when only limited volumes of blood can be collected and when a combination of antibody and cytokine measurements are required. These analytes, when used together, may also have the potential to differentiate active pulmonary TB (APTB) from latent TB infection (LTBI). However, few studies have explored the use of QFT-GIT supernatants for investigations of antibody responses...
2017: PloS One
https://www.readbyqxmd.com/read/29150737/risk-of-active-tuberculosis-in-patients-with-inflammatory-arthritis-receiving-tnf-inhibitors-a-look-beyond-the-baseline-tuberculosis-screening-protocol
#2
Alina Soare, Ana Maria Gheorghiu, Victoria Aramă, Dragoș Bumbăcea, Rucsandra Dobrotă, Raida Oneaţă, Simona Pintilie, Mihaela Milicescu, Ioan Ancuţa, Andrei Martin, Mariana Sasu, Claudia Ciofu, Liviu Macovei, Victor Stoica, Mihai Bojincă, Carina Mihai
Tuberculosis (TB) is a major concern in patients receiving TNF inhibitors (TNFi). This study aimed to assess the incidence of active TB and the efficacy of TB prevention measures used over the years, and to determine risk factors for developing TB, in a single-centre cohort of patients with rheumatoid arthritis (RA), psoriatic arthritis (PsA) and ankylosing spondylitis (AS) receiving TNFi. Data of all patients in whom treatment with TNFi was initiated in our rheumatology clinic until December 1st 2014 have been retrospectively analysed...
November 17, 2017: Clinical Rheumatology
https://www.readbyqxmd.com/read/29145443/lessons-learned-from-continued-tb-outbreaks-in-a-high-school
#3
Young Kim, Byeong Ki Kim, Hong Jo Choi, Sung Weon Ryu, Eui Sook Kim, Yoon Soo Chang, Hee Jin Kim, Jae Hyung Cha, Je Hyeong Kim, Chol Shin, Seung Heon Lee
We investigated the aftereffects of confirmatory QuantiFERON testing (QFT) added to a positive tuberculin skin test (TST). We reviewed the pre and post course of sequential tuberculosis (TB) outbreaks in a high school where massive 43 active TB cases had been found within one year before delayed contact investigation. And we investigated the TB development in relation to initial TST and QFT during mean follow-up of 3.9 ± 0.9 years. After delayed contact investigation for two subsequent TB outbreaks, 925 contacts were divided into the following 3 groups: TST- (n = 632), TST+/QFT+ (n = 24), TST+/QFT- (n = 258)...
2017: PloS One
https://www.readbyqxmd.com/read/29142046/quantitative-analysis-of-interferon-%C3%AE-release-assay-response-in-children-with-latent-and-active-tuberculosis
#4
Giulia Lombardi, Roberta Petrucci, Ilaria Corsini, Maria Letizia Bacchi Reggiani, Francesca Visciotti, Filippo Bernardi, Maria Paola Landini, Salvatore Cazzato, Paola Dal Monte
The use of interferon-γ (IFN-γ) release assays (IGRAs) for the diagnosis of tuberculosis (TB) infection in children is still under debate because of concerns about their immature immune response.The aim of this study was to investigate quantitative values of QuantiFERON®-TB Gold In-Tube (QFT-IT), a commercially available IGRA, in a large cohort of children screened for TB infection.A retrospective analysis was conducted on samples from 517 children aged 0-14 years old at the Pediatric Unit of S. Orsola-Malpighi University Hospital of Bologna (Italy); quantitative responses to QFT-IT stimuli were analyzed according to diagnosis and age...
November 15, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/29140946/comparison-of-the-quantiferon-tb-gold-in-tube-assay-with-tuberculin-skin-test-for-the-diagnosis-of-latent-tuberculosis-infection-among-hiv-infected-and-uninfected-children
#5
Walter Dehority, Rolando M Viani, Maria Rosario G Araneta, Graciano Lopez, Stephen A Spector
BACKGROUND: Diagnosis of latent tuberculosis infection (LTBI) is facilitated by tuberculin skin testing (TST) or interferon-gamma release assays such as the QuantiFERON TB Gold In-Tube (QTF-GIT) assays. Limited data exist on the utility of interferon-gamma release assays in HIV-infected children, which may be falsely negative due to immunosuppression. METHODS: A cross-sectional study comparing TST to QTF-GIT for the diagnosis of suspected LTBI was performed in children in Tijuana, Mexico, and in San Diego, California...
December 2017: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/29136358/is-secretion-of-ifn-gamma-in-response-to-mycobacterium-tuberculosis-antigens-in-youngest-children-sufficient-to-play-a-role-in-tb-diagnostics
#6
Teresa Bielecka, Anna Komorowska-Piotrowska, Katarzyna Krenke, Wojciech Feleszko, Marek Kulus
OBJECTIVES: To assess whether children ≤5 years of age, produce sufficient amounts of interferon gamma (IFN-ɣ) in response to phytohaemagglutinin (mitogen), and Mycobacterium tuberculosis antigens (TB antigens) in the QuantiFERON-TB Gold in-Tube test (QFT-GIT), (Cellestis Ltd., Australia). WORKING HYPOTHESIS: Is TB-antigen-induced IFN-ɣ response in children ≤5 years sufficient to consider QFT-GIT a possible tool for TB diagnostics? Study design, patient-subject selection, and methods: We recruited children 0-17 years old suspected of TB infection to this cross-sectional study, in whom QFT-GIT and TST were performed...
November 14, 2017: Pediatric Pulmonology
https://www.readbyqxmd.com/read/29108749/sensitivity-and-specificity-of-quantiferon-tb-gold-plus-compared-with-quantiferon-tb-gold-in-tube-and-t-spot-tb-on-active-tuberculosis-in-japan
#7
Jin Takasaki, Toshie Manabe, Eriko Morino, Yoshikazu Muto, Masao Hashimoto, Motoyasu Iikura, Shinyu Izumi, Haruhito Sugiyama, Koichiro Kudo
BACKGROUND: The QuantiFERON-TB Gold Plus (QFT-Plus) was introduced in 2015 as a new generation of interferon-gamma release assays (IGRAs) designed to detect Mycobacterium tuberculosis infection (TB). Examination of its diagnostic accuracy is crucial before it is launched in Japan. METHOD: We examined 99 patients with laboratory-confirmed active TB (patients) and 117 healthy volunteers with no risk of TB infection (controls) at a medical center in Tokyo, Japan. Blood samples were collected from both the patients and controls and tested using three types of IGRAs: the QFT-Plus, the QuantiFERON-TB Gold In-Tube (QFT-GIT), and the T-SPOT...
November 3, 2017: Journal of Infection and Chemotherapy: Official Journal of the Japan Society of Chemotherapy
https://www.readbyqxmd.com/read/29101754/testing-of-tuberculosis-infection-among-chinese-adolescents-born-after-terminating-the-bacillus-calmette-gu%C3%A3-rin-booster-vaccination-subgroup-analysis-of-a-population-based-cross-sectional-study
#8
Hengjing Li, Henan Xin, Shukun Qian, Xiangwei Li, Haoran Zhang, Mufei Li, Boxuan Feng, Qi Jin, Lei Gao
The prevalence of tuberculosis infection among adolescents born after terminating the Bacillus Calmette-Guérin (BCG) booster vaccination in China was estimated using tuberculin skin testing (TST) and QuantiFERON-TB Gold assay (QFT) to investigate the influence of neonatal BCG vaccination on the performance of TST. Data analysis was conducted for 2831 eligible participants aged 5-15 years from the baseline survey of a population-based multi-center prospective study. The prevalence rates of TST (induration = 10 mm) and QFT positivity were 9...
November 3, 2017: Frontiers of Medicine
https://www.readbyqxmd.com/read/29099497/tuberculosis-and-other-causes-of-uveitis-in-indonesia
#9
R La Distia Nora, R Sitompul, M Bakker, M Susiyanti, L Edwar, S Sjamsoe, G Singh, M P van Hagen, A Rothova
PurposeThe purpose of this study is to assess the causes of uveitis in Indonesia and determine the importance of tuberculosis (TB) as a cause of uveitis.Patients and methodsProspective cohort study examining 146 consecutive new human immunodeficiency virus-negative patients with active uveitis between June 2014 and May 2015. We assessed the anatomic locations and specific causes of uveitis, as well as associations with infectious and non-infectious systemic diseases. We determined the prevalence of positive QuantiFERON Tb Gold test (QFT) results in Indonesian patients with uveitis and calculated the number of patients with active systemic TB...
November 3, 2017: Eye
https://www.readbyqxmd.com/read/29095918/a-borderline-range-for-quantiferon-gold-in-tube-results
#10
Jerker Jonsson, Anna Westman, Judith Bruchfeld, Erik Sturegård, Hans Gaines, Thomas Schön
OBJECTIVE: Interferon gamma release assays like Quantiferon Gold In-Tube (QFT) are used to identify individuals infected with Mycobacterium tuberculosis. A dichotomous cut-off (0.35 IU/ml) defines a positive QFT without considering test variability. Our objective was to evaluate the introduction of a borderline range under routine conditions. METHODS: Results of routine QFT samples from Sweden (2009-2014) were collected. A borderline range (0.20-0.99 IU/ml) was introduced in 2010 recommending a follow-up sample...
2017: PloS One
https://www.readbyqxmd.com/read/29093653/comparison-of-the-commercial-quantiferon-cmv-and-overlapping-peptide-based-elispot-assays-for-predicting-cmv-infection-in-kidney-transplant-recipients
#11
Ji-Soo Kwon, Taeeun Kim, Sun-Mi Kim, Heungsup Sung, Sung Shin, Young Hoon Kim, Eui-Cheol Shin, Sung-Han Kim, Duck Jong Han
Cytomegalovirus (CMV) is one of the most important opportunistic infections in transplant recipients. Tests for CMV-specific T cell responses have been proposed to change the current risk stratification strategy using CMV assays. We evaluated the usefulness of pre-transplant CMV-specific T cell assays in kidney transplant (KT) candidates for predicting the development of CMV infection after transplantation comparing the results of the overlapping peptides (OLPs)-based enzyme-linked immunospot (ELISPOT) assay and the commercial QuantiFERON-CMV assay...
October 2017: Immune Network
https://www.readbyqxmd.com/read/29077184/choroidal-neovascular-membranes-secondary-to-intraocular-tuberculosis-misdiagnosed-as-neovascular-age-related-macular-degeneration
#12
Alessandro Invernizzi, Aniruddha Agarwal, Maura Di Nicola, Fabio Franzetti, Giovanni Staurenghi, Francesco Viola
PURPOSE: Intraocular tuberculosis (IOTB) can be complicated by choroidal neovascularization (CNV). However, when the CNV development is not accompanied by clear signs of inflammation, the etiology can be missed, especially in countries nonendemic for tuberculosis. We describe the clinical and imaging features of CNVs presenting as the first sign of IOTB initially misdiagnosed as exudative age-related macular degeneration (AMD). METHODS: A retrospective review of clinical and imaging data of patients initially misdiagnosed with neovascular AMD later diagnosed with inflammatory CNV secondary to IOTB at tertiary referral centers was conducted...
October 26, 2017: European Journal of Ophthalmology
https://www.readbyqxmd.com/read/29076692/genital-tuberculosis-mimicking-carcinoma-ovary-can-ultrasound-guided-biopsy-be-a-resolution
#13
Nosheen Akhtar, Zartaj Hayat, Fatima Nazim
Genital tuberculosis mimicking carcinoma ovary is a well-known dilemma as there is no definitive serological or imaging modality for diagnosing abdominopelvic tuberculosis. A 20-years-old unmarried girl presented with complex adnexal mass, mild ascites and CA 125 >1000. Her staging laparotomy and frozen section was planned. Laparotomy revealed miliary tuberculosis and frozen section confirmed the diagnosis of tuberculosis. Patient was started with anti-tuberculosis treatment and follow up showed resolution of cysts...
July 2017: Journal of Ayub Medical College, Abbottabad: JAMC
https://www.readbyqxmd.com/read/29069962/limitations-of-quantiferon-tb-gold-assay-for-screening-of-psoriasis-patients-prior-to-anti-tumour-necrotic-factor-treatment
#14
Alessandra Bua, Stefania Zanetti, Maria Francesca Peigottu, Maria Antonetta Montesu, Paola Molicotti
No abstract text is available yet for this article.
October 26, 2017: Infectious Diseases
https://www.readbyqxmd.com/read/29069328/the-relationship-between-latent-tuberculosis-infection-and-acute-myocardial-infarction
#15
Moises A Huaman, Eduardo Ticona, Gustavo Miranda, Richard J Kryscio, Raquel Mugruza, Ernesto Aranda, Paola Rondan, David Henson, Cesar Ticona, Timothy R Sterling, Carl J Fichtenbaum, Beth A Garvy
Background: Tuberculosis has been associated with an increased risk of cardiovascular disease, including acute myocardial infarction (AMI). We investigated whether latent tuberculosis infection (LTBI) associates with AMI. Methods: We conducted a case-control study in two large national public hospital networks in Lima, Peru between July 2015 and March 2017. Cases were patients with a first time diagnosis of type 1 (spontaneous) AMI. Controls were patients without a history of AMI...
October 21, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29054459/lymphocyte-subset-analysis-in-quantiferon-tb-gold-plus-and-t-spot-tb-for-latent-tuberculosis-infection-in-rheumatoid-arthritis
#16
Hidetoshi Igari, Satoru Ishikawa, Takuya Nakazawa, Yoshihiro Oya, Hidekazu Futami, Mizue Tsuyuzaki, Kiminori Suzuki, Ryutaro Matsumura
Rheumatoid arthritis (RA) is an immune mediated inflammatory disorder, and immune suppressive drugs are prescribed. RA patients receiving treatments are in a kind of immunosuppressive condition that presents increased risk of developing active tuberculosis. Accurate diagnosis of latent tuberculosis infection (LTBI) is recommended for RA. QuantiFERON(®)-TB Gold Plus (QFT-Plus), a novel IGRA, has two tubes (TB1 and TB2). TB2 is designed to elicit both CD4 and CD8 T-cell responses, with expected increased sensitivity...
October 18, 2017: Journal of Infection and Chemotherapy: Official Journal of the Japan Society of Chemotherapy
https://www.readbyqxmd.com/read/29051973/igra-testing-in-patients-with-immune-mediated-inflammatory-diseases-which-factors-influence-the-results
#17
Juan González-Moreno, Mercedes García-Gasalla, Inés Losada-López, Carmen Cifuentes Luna, Isabel Mir Viladrich, Victoria Fernández-Baca, Araceli Serrano, Antonio Juan Mas, Joan Riera-Oliver, Antoni Payeras Cifre
Diagnosis of latent tuberculosis infection in patients with immune-mediated inflammatory chronic diseases (IMIDs) can be challenged as diagnostic test reliability could be impaired by immunosuppression. We retrospectively analyzed the Quantiferon Gold-Test in-Tube (QFT-G-IT) results of all patients with IMIDs seen at the Department of Internal Medicine of Son Llàtzer Hospital, Palma de Mallorca (Spain), looking for the factors related to QFT-G-IT indeterminate results. During the study period (2008-2015), 520 patients met the inclusion criteria...
October 19, 2017: Rheumatology International
https://www.readbyqxmd.com/read/29050776/blood-antimicrobial-activity-varies-against-different-mycobacterium-spp
#18
Octavio Miguel Rivero-Lezcano, Sara Blanco-Conde, Ramiro López-Medrano, Eduardo López-Fidalgo, Manuela Caño-Herrero, Teresa Nebreda-Mayoral
In vitro analysis of mycobacterial pathogenicity or host susceptibility has traditionally relied on the infection of macrophages, the target cell of mycobacteria, despite difficulties reproducing their antimycobacterial activity. We have employed alternative models, namely whole blood and leukocytes in plasma, from QuantiFERON negative individuals, and performed infections with the pathogenic M. tuberculosis, the less pathogenic M. avium, M. kansasii and M. chelonae and the occasionally pathogenic M. gordonae and M...
December 2017: Tuberculosis
https://www.readbyqxmd.com/read/29044084/infectious-chorioretinitis-in-an-immunocompetent-patient-a-diagnostic-dilemma
#19
Sudha K Ganesh, B Sowkath Ali, H N Madhavan
A 44-year-old male presented with a history of defective vision in the right eye for the past 5 months with the previous history of tubercular cervical lymphadenitis. On examination, right eye revealed panuveitis with dense vitritis and chorioretinitis in the superotemporal quadrant. His Mantoux test was positive (25 mm × 25 mm induration), QuantiFERON-TB Gold was test positive, aqueous aspirate was positive for Mycobacterium tuberculosis genome, negative for viruses and toxoplasma, and hence he was initiated on four-drug antitubercular therapy (ATT) with oral steroids...
October 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/29028965/tuberculin-skin-test-conversions-and-occupational-exposure-risk-in-us-healthcare-workers
#20
Claudia C Dobler, Wigdan H Farah, Mouaz Alsawas, Khaled Mohammed, Laura E Breeher, M Hassan Murad, Robin G Molella
Background: Health care workers (HCWs) undergo occupational tuberculosis (TB) screening at regular intervals. However, the risk of contracting TB at the workplace in a setting with a low background TB incidence is unclear. We aimed to evaluate the risk of tuberculin skin test (TST) conversion and the risk of occupational TB infection among HCWs in such a setting. Methods: We conducted a retrospective cohort study of employees of a large tertiary medical center in the US Midwest who had undergone TST screening during the study period January 1, 1998 to May 31, 2014...
October 4, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
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