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https://www.readbyqxmd.com/read/29782877/analysis-of-spontaneous-resolution-of-cytomegalovirus-replication-after-transplantation-in-cmv-seropositive-patients-with-pretransplant-cd8-ifng-response
#1
Aurora Páez-Vega, Antonio Poyato, Alberto Rodriguez-Benot, Lluis Guirado, Jesús Fortún, Oscar Len, Edson Abdala, María C Fariñas, Elisa Cordero, Carmen de Gracia, Domingo Hernández, Rafael González, Julián Torre-Cisneros, Sara Cantisán
This prospective study evaluates whether CMV-seropositive (R+) transplant patients with pretransplant CD8+IFNG+ T-cell response to cytomegalovirus (CMV) (CD8+IFNG+ response) can spontaneously clear the CMV viral load without requiring treatment. A total of 104 transplant patients (kidney/liver) with pretransplant CD8+IFNG+ response were evaluable. This response was determined using QuantiFERON-CMV assay. The incidence of CMV replication and disease was 45.2% (47/104) and 6.7% (7/104), respectively. Of the total patients, 77...
May 18, 2018: Antiviral Research
https://www.readbyqxmd.com/read/29779769/seasonal-variation-in-the-performance-of-quantiferon-tb-gold-in-tube-assays-used-for-the-diagnosis-of-tuberculosis-infection
#2
Marc Tebruegge, Nigel Curtis, Vanessa Clifford, Cristina Fernandez-Turienzo, Nigel Klein, Katy Fidler, Salah Mansour, Paul Elkington, Stephen Morris-Jones
This study aimed to determine whether there are seasonal changes in the performance of QuantiFERON-TB Gold In-Tube (QFT-GIT) assays, an interferon-gamma release assay widely used for the diagnosis of tuberculosis infection. Results of 31,932 QFT-GIT assays performed at a large independent, accredited diagnostic service provider in London, UK over a 4.5-year-period were analysed. The proportion of positive results was significantly lower in autumn (14.8%) than in spring (16.0%; p = 0.0366) and summer (17...
May 2018: Tuberculosis
https://www.readbyqxmd.com/read/29777573/quantiferon-cytomegalovirus-assay-a-potentially-useful-tool-in-the-evaluation-of-cmv-specific-cd8-t-cell-reconstitution-in-pediatric-hematopoietic-stem-cell-transplant-patients
#3
Bilio Paouri, Alexandra Soldatou, Eftihia Petrakou, Maria Theodosaki, Charalampos Tsentidis, Katerina Kaisari, Christina Oikonomopoulou, Minos Matsas, Eugenios Goussetis
Pediatric HSCT recipients are at high risk for CMV reactivation due to their immature immune system and therapy following transplantation. Reconstitution of CMV-specific T-cell immunity is associated with control and protection against CMV. The clinical utility of monitoring CMV-specific CMI to predict CMV viremia in pediatric HSCT patients using the Quantiferon-CMV (QIAGEN® ) test was investigated prospectively. Thirty-seven pediatric allogeneic HSCT recipients were enrolled from 3/2010-6/2012. CMV viremia was detected via weekly real-time PCR...
May 18, 2018: Pediatric Transplantation
https://www.readbyqxmd.com/read/29777119/changes-in-t-cell-effector-functions-over-an-8-year-period-with-tnf-antagonists-in-patients-with-chronic-inflammatory-rheumatic-diseases
#4
Ilaria Sauzullo, Rossana Scrivo, Paola Sessa, Fabio Mengoni, Vincenzo Vullo, Guido Valesini, Claudio Maria Mastroianni
The aim of the study was to clarify the effect of long-term anti-TNF therapy on T cell function in patients with rheumatologic immune-mediated inflammatory diseases (IMID). The production of IFNγ by T cells was evaluated at baseline and after 1, 2, 4, and 8 years of anti-TNF agents by means of a QuantiFERON-TB Gold In-Tube assay. The T cell proliferation and surface co-expression of CD25/CD134 in response to phytohaemagglutinin together with the in vitro impact of anti-TNF therapy on the functional capacity of T cells were evaluated after 8 years from the onset of the biological treatment...
May 18, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29758278/prevalence-of-and-risk-factors-associated-with-latent-tuberculosis-in-singapore-a-cross-sectional-survey
#5
Peiling Yap, Kristin Hui Xian Tan, Wei Yen Lim, Timothy Barkham, Linda Wei Lin Tan, Mark Chen I-Cheng, Yee Tang Wang, Cynthia Bin Eng Chee
OBJECTIVES: We performed the first LTBI cross-sectional survey in Singapore, utilizing the QuantiFERON Gold In-tube (QFT-GIT) assay to collect data on the prevalence of LTBI and identify potential risk factors associated with it. METHODS: Nation-wide household addresses were randomly selected for enumeration, where Singaporeans or Permanent Residents (PRs), aged 18-79 years, were identified. One eligible member per household was selected using the Kish grid. Each participant answered a questionnaire, assessing medical history (including TB), socio-economic factors and lifestyle and provided a blood specimen for the QFT-GIT assay...
May 11, 2018: International Journal of Infectious Diseases: IJID
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
#6
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/29755013/screening-for-latent-tuberculosis-infection-in-patients-with-inflammatory-bowel-disease-can-interferon-gamma-release-assays-replace-the-tuberculin-skin-test
#7
José Luis Cabriada, Rafael Ruiz-Zorrilla, Jesús Barrio, Ramón Atienza, Alain Huerta, Iago Rodríguez-Lago, Antonio Bernal, César Herrero
BACKGROUND/AIMS: Screening for latent tuberculosis infection is mandatory before starting anti-tumor necrosis factor therapy. New assays based on interferon-γ (IFN-γ) release have recently become available and may be more accurate. The aim of this study was to compare QuantiFERON-TB and tuberculin skin test in screening for latent infection in patients with inflammatory bowel disease. MATERIALS AND METHODS: We prospectively screened 138 patients with inflammatory bowel disease for latent tuberculosis infection with chest X-ray, tuberculin skin test, and a third-generation QuantiFERON-TB test...
May 2018: Turkish Journal of Gastroenterology: the Official Journal of Turkish Society of Gastroenterology
https://www.readbyqxmd.com/read/29751780/quantiferon-tb-gold-in-tube-test-for-the-diagnosis-of-active-and-latent-tuberculosis-in-selected-health-facilities-of-addis-ababa-ethiopia
#8
Selam Niguse, Kassu Desta, Gebremdihin Gebremichael, Atsebeha Gebrezgeaxier, Mulluwork Getahun, Desta Kassa
OBJECTIVE: To determine the performance of QuantiFERON-TB IN-Gold for the diagnosis active tuberculosis and latent tuberculosis. RESULTS: A total of 213 participants (136 tuberculosis suspects, 66 latently infected) were enrolled. Of 213, 21 (15.4%) of the tuberculosis suspects and 3 (4.5%) of the latent tuberculosis groups were human immunodeficiency virus infected. The sensitivity, specificity, positive and negative predictive value of QuantiFERON-TB IN-Gold for the diagnosis of active tuberculosis was 70...
May 11, 2018: BMC Research Notes
https://www.readbyqxmd.com/read/29746953/reversion-of-quantiferon-tb-gold-in-tube-test-in-individuals-with-and-without-prophylactic-treatment-for-latent-tuberculosis-infection-a-systematic-review-and-meta-analysis
#9
Haoran Zhang, Henan Xin, Xiangwei Li, Hengjing Li, Mufei Li, Boxuan Feng, Lei Gao
OBJECTIVES: Reversion of tuberculosis (TB) infection testing has been suggested to be associated with prophylactic treatment efficacy. However, evidences based on randomized controlled study were sparse. METHODS: Studies on serial QuantiFERON-TB Gold In-Tube (QFT) test, among individuals with and without prophylactic treatment were identified in the databases of PubMed, MEDLINE and EMBASE up to 28 February 2018. The reversion rates were quantitatively summarized by means of meta-analysis using the random-effect model...
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
#10
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/29731933/latent-tuberculosis-infection-diagnosis-and-treatment
#11
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/29731582/granuloma-of-the-labial-minor-salivary-glands-in-tuberculosis
#12
Adriana Handra-Luca
Minor salivary gland granuloma is rare in tuberculosis. We present a case of labial minor salivary gland granulomas occurring in the course of tuberculosis along with skin, mediastinal and liver granulomas. The patient (46-year-old man) presented with asthenia, nocturne transpiration, weight loss and compressive thoracic adenopathies. The angiotensin I converting enzyme was elevated as well as calcemia. The QuantiFERON test and culture of a mediastinal specimen were positive for Mycobacterium tuberculosis ...
January 2018: Journal of Oral and Maxillofacial Pathology: JOMFP
https://www.readbyqxmd.com/read/29721337/influence-of-seasonality-and-circulating-cytokines-on-serial-quantiferon-discordances
#13
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/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
#14
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/29695323/evaluation-of-mycobacteria-specific-gamma-interferon-and-antibody-responses-before-and-after-a-single-intradermal-skin-test-in-cattle-naturally-exposed-to-m-avium-subsp-paratuberculosis-and-experimentally-infected-with-m-bovis
#15
Virginie Roupie, Elena Alonso-Velasco, Sarah Van Der Heyden, Sébastien Holbert, Lucille Duytschaever, Patricia Berthon, Iris Van Dosselaer, Willem Van Campe, Laurent Mostin, Franck Biet, Stefan Roels, Kris Huygen, David Fretin
This study reports on the diagnostic potential of IFN-γ release assays and serology for Mycobacterium bovis in six naturally M. avium subsp. paratuberculosis (Map) exposed bulls of which four were intratracheally infected with a Belgian field strain of M. bovis. Heparinized blood, serum and fecal samples were collected at regular time intervals for mycobacteria-specific IFN-γ release assays, antibody analysis and for Map culture respectively. Single intradermal skin test (SIT) with bovine tuberculin (PPD-B) was performed on day 115 and animals were sacrificed on day 133 after M...
February 2018: Veterinary Immunology and Immunopathology
https://www.readbyqxmd.com/read/29692316/extended-screening-for-infectious-diseases-among-newly-arrived-asylum-seekers-from-africa-and-asia-verona-province-italy-april-2014-to-june-2015
#16
Dora Buonfrate, Federico Gobbi, Valentina Marchese, Chiara Postiglione, Geraldo Badona Monteiro, Giovanni Giorli, Giuseppina Napoletano, Zeno Bisoffi
Background and aimManagement of health issues presented by newly-arrived migrants is often limited to communicable diseases even though other health issues may be more prevalent. We report the results of infectious disease screening proposed to 462 recently-arrived asylum seekers over 14 years of age in Verona province between April 2014 and June 2015. Methods: Screening for latent tuberculosis (TB) was performed via tuberculin skin test (TST) and/or QuantiFERON-TB Gold in-tube assay and/or chest X-ray. An ELISA was used to screen for syphilis...
April 2018: Euro Surveillance: Bulletin Européen sur les Maladies Transmissibles, European Communicable Disease Bulletin
https://www.readbyqxmd.com/read/29663954/characteristics-of-a-large-latent-tuberculous-infection-screening-programme-using-quantiferon-%C3%A2-tb-gold-in-korea
#17
H-J Hwang, J-H Park, S Nam, H-J Lee, H-J Kim, S Yu, S-Y Shin
BACKGROUND: As mentioned in the 'Action Strategy for TB Safe Korea' in March 2017, almost 2 million Koreans were screened for latent tuberculous infection (LTBI) in 2017. As a preliminary step, the Korean Institute of Tuberculosis (KIT) screened 23 824 individuals from various population groups. The present study aimed to characterise the data collected from the screening programme using the QuantiFERON®-TB Gold In-Tube (QFT) assay. METHODS: Interferon-gamma release assays were performed using the manual QFT or automated DS2 instruments...
May 1, 2018: International Journal of Tuberculosis and Lung Disease
https://www.readbyqxmd.com/read/29663953/cost-effectiveness-of-contact-screening-strategies-for-tuberculosis-among-high-school-adolescents-in-south-korea
#18
H Sohn, H-Y Kim, S H Lee
BACKGROUND: Effective latent tuberculous infection (LTBI) control among adolescents is a critical component of tuberculosis (TB) elimination in Korea. OBJECTIVE: To compare the cost-effectiveness of the following contact screening strategies for LTBI among high-school adolescents after TB outbreaks: QuantiFERON®-TB Gold In-Tube (QFT-GIT), the tuberculin skin test (TST), or TST/QFT-GIT (two-step strategy). METHOD: The costs of post-TB outbreak screening strategies were calculated using a mixed (top-down and bottom-up) cost analysis method and expressed in 2015 US dollars...
May 1, 2018: International Journal of Tuberculosis and Lung Disease
https://www.readbyqxmd.com/read/29661197/relevance-and-acceptability-of-using-the-quantiferon-gold-test-qgit-to-screen-cd4-blood-draws-for-latent-tb-infection-among-plhiv-in-south-africa-formative-qualitative-research-findings-from-the-teko-trial
#19
Deanna Kerrigan, Carrie Tudor, Katlego Motlhaoleng, Limakatso Lebina, Cokiswa Qomfu, Ebrahim Variava, Sandy Chon, Neil Martinson, Jonathan E Golub
BACKGROUND: Tuberculosis (TB) is the leading cause of mortality among people living with HIV (PLHIV), despite the availability of effective preventive therapy. The TEKO trial is assessing the impact of using a blood test, Quantiferon-TB Gold In-Tube Test (QGIT), to screen for latent TB compared to the Tuberculin Screening Test (TST) among PLHIV in South Africa. METHODS: Fifty-six qualitative interviews were conducted with PLHIV and clinical providers participating in the TEKO trial...
April 16, 2018: BMC Health Services Research
https://www.readbyqxmd.com/read/29661141/diagnostic-utility-of-monitoring-cytomegalovirus-specific-immunity-by-quantiferon-cytomegalovirus-assay-in-kidney-transplant-recipients
#20
Dominika Deborska-Materkowska, Agnieszka Perkowska-Ptasinska, Anna Sadowska, Jolanta Gozdowska, Michał Ciszek, Marta Serwanska-Swietek, Piotr Domagala, Dorota Miszewska-Szyszkowska, Elzbieta Sitarek, Agnieszka Jozwik, Artur Kwiatkowski, Magdalena Durlik
BACKGROUND: Despite universal prophylaxis, late cytomegalovirus (CMV) infection occurs in a high proportion of kidney transplant recipients. We evaluated whether a specific viral T-cell response allows for the better identification of recipients who are at high risk of CMV infection after prophylaxis withdrawal. METHODS: We conducted a prospective study in 19 pretransplant anti-CMV seronegative kidney graft recipients R- (18 from seropositive donors [D+] and one from a seronegative donor [D-]) and 67 seropositive recipients R(+) (59 from seropositive donors and eight from seronegative donors) who received antiviral prophylaxis with valganciclovir...
April 16, 2018: BMC Infectious Diseases
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