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https://www.readbyqxmd.com/read/28317812/evaluation-of-pulmonary-tuberculosis-case-detection-improvement-with-the-deployment-of-xpertmtb-rif-in-the-tuberculosis-control-program-of-cross-river-state-nigeria
#1
Ernest Afu Ochang, Ubleni E Emanghe, Atana Ewa, Akaninyene Otu, Jonah B Offor, Micheal Odo, Aniekan Etokidem, Barinadaa Afirima, Oju Eni Owuna, Sunday M Obeten, Martin M Meremikwu
OBJECTIVE/BACKGROUND: Global indices show that Nigeria has the highest tuberculosis (TB)-related mortality rate. Overdependence on Ziehl-Neelsen (ZN) smear microscopy for diagnosis and human immunodeficiency virus (HIV)/AIDS has limited control efforts. The new polymerase chain reaction-based XpertMTB/Rif (Cepheid Inc., CA, USA), which detects Mycobacterium tuberculosis and rifampicin resistance, was introduced in Cross River State in 2014. We evaluated the increment in pulmonary TB case detection following introduction of XpertMTB/Rif into the Cross River State TB control program...
January 2017: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28317811/performance-of-the-xpert-mtb-rif-assay-in-the-diagnosis-of-tuberculosis-in-formalin-fixed-paraffin-embedded-tissues
#2
Pascal Polepole, Mwila Kabwe, Mpanga Kasonde, John Tembo, Aaron Shibemba, Justin O'Grady, Nathan Kapata, Alimuddin Zumla, Matthew Bates
OBJECTIVE/BACKGROUND: Extrapulmonary tuberculosis (EPTB), which accounts for 10%-40% of the global burden of TB, with the highest incidence in Sub-Saharan Africa, is strongly associated with human immunodeficiency virus infection. Diagnosing EPTB is challenging, and recently, there has been a concerted effort to evaluate the latest molecular diagnostics for diagnosing TB in a range of specimen types. The Xpert MTB/RIF assay (Cepheid, Sunnyvale, CA, USA) is one such technology, which simultaneously detects Mycobacterium tuberculosis and rifampicin resistance...
January 2017: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28317808/isolation-and-characterization-of-nontuberculous-mycobacteria-from-patients-with-pulmonary-tuberculosis-in-ghana
#3
Isaac Darko Otchere, Adwoa Asante-Poku, Stephen Osei-Wusu, Samuel Yaw Aboagye, Dorothy Yeboah-Manu
OBJECTIVE/BACKGROUND: Nontuberculous mycobacterial (NTM) species are assuming public health importance in pulmonary diseases; they are increasingly being isolated, and importantly, most NTMs do not respond to routine tuberculosis (TB) drugs. This study aimed to identify NTMs isolated from pulmonary TB cases and also determine their susceptibility to streptomycin (STR), isoniazid (INH), and rifampicin (RIF). METHODS: A total of 1755 mycobacterial isolates, obtained between August 2012 and July 2014, from 2036 smear-positive pulmonary cases were identified using polymerase chain reaction amplification of IS6110, and hsp65 gene sequencing analysis...
January 2017: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28317800/are-who-approved-nucleic-acid-amplification-tests-causing-large-scale-false-identification-of-rifampicin-resistant-tuberculosis-programmatic-experience-from-south-india
#4
Praveen Sanker, Anusree P Ambika, Vishnu T Santhosh, Ramya Puthukkudi Kottuthodi, Ravikrishnan Balakrishnan, Sunil Kumar Mrithunjayan, Hisham Moosan
INTRODUCTION: The nucleic acid amplification tests (NAATs): Line probe assay and GeneXpert (Xpert) have evolved as the primary tool for identification of rifampicin (RIF)-resistant (RR) tuberculosis (TB) worldwide, primarily because of the ease and speed. We rechecked RR isolates identified by NAATs from presumptive RR TB cases belonging to South India by the Revised National TB Control Program, India using multiple RIF concentrations on Bactec MGIT system and compared the mutation patterns with the resistance levels...
January 2017: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28298258/susceptibility-to-rifaximin-and-other-antimicrobials-of-bacteria-isolated-in-patients-with-acute-gastrointestinal-infections-in-southeast-mexico
#5
O Novoa-Farias, A C Frati-Munari, M A Peredo, S Flores-Juárez, O Novoa-García, J Galicia-Tapia, C E Romero-Carpio
INTRODUCTION: Enteropathogenic bacteria isolated in Mexico City have shown a high rate of resistance to different antibiotics, with the exception of rifaximin (RIF). RIF is a nonabsorbable antibiotic that reaches high fecal concentrations (≈ 8,000μg/g). Susceptibility to antimicrobials can vary in different geographic regions. AIM: To study the susceptibility to rifaximin and other antimicrobials of enteropathogenic bacteria isolated in patients with acute diarrhea in the southeastern region of Mexico...
March 12, 2017: Revista de Gastroenterología de México
https://www.readbyqxmd.com/read/28284274/initial-screening-of-extra-pulmonary-tuberculosis-using-the-xpert-mtb-rif-assay-improves-case-detection-rates
#6
Amita Jain, Pravin Kumar Singh, Urmila Singh, Vijay Kumar
No abstract text is available yet for this article.
April 1, 2017: International Journal of Tuberculosis and Lung Disease
https://www.readbyqxmd.com/read/28284253/effect-of-previous-treatment-and-sputum-quality-on-diagnostic-accuracy-of-xpert-%C3%A2-mtb-rif
#7
C Acuña-Villaorduña, P Orikiriza, D Nyehangane, L F White, J Mwanga-Amumpaire, S Kim, M Bonnet, K P Fennelly, Y Boum, E C Jones-López
SETTING: In early studies, Xpert® MTB/RIF accurately detected culture-proven pulmonary tuberculosis (TB). Recent reports have, however, found a lower than expected specificity in previously treated TB patients. OBJECTIVE: To investigate the diagnostic accuracy of Xpert in presumptive pulmonary TB patients in Southwestern Uganda. DESIGN: We obtained demographic and clinical information and collected three sputum samples from each patient for smear microscopy, Xpert and culture...
April 1, 2017: International Journal of Tuberculosis and Lung Disease
https://www.readbyqxmd.com/read/28284252/operational-modelling-the-mechanisms-influencing-tb-diagnostic-yield-in-an-xpert-%C3%A2-mtb-rif-based-algorithm
#8
R Dunbar, P Naidoo, N Beyers, I Langley
SETTING: Cape Town, South Africa. OBJECTIVE: To compare the diagnostic yield for smear/culture and Xpert® MTB/RIF algorithms and to investigate the mechanisms influencing tuberculosis (TB) yield. METHOD: We developed and validated an operational model of the TB diagnostic process, first with the smear/culture algorithm and then with the Xpert algorithm. We modelled scenarios by varying TB prevalence, adherence to diagnostic algorithms and human immunodeficiency virus (HIV) status...
April 1, 2017: International Journal of Tuberculosis and Lung Disease
https://www.readbyqxmd.com/read/28284251/bottom-up-or-top-down-unit-cost-estimation-of-tuberculosis-diagnostic-tests-in-india
#9
S Rupert, A Vassall, N Raizada, S D Khaparde, C Boehme, V S Salhotra, K S Sachdeva, S A Nair, A H Van't Hoog
SETTING: Of 18 sites that participated in an implementation study of the Xpert® MTB/RIF assay in India, we selected five microscopy centres and two reference laboratories. OBJECTIVE: To obtain unit costs of diagnostic tests for tuberculosis (TB) and drug-resistant TB. DESIGN: Laboratories were purposely selected to capture regional variations and different laboratory types. Both bottom-up and the top-down methods were used to estimate unit costs...
April 1, 2017: International Journal of Tuberculosis and Lung Disease
https://www.readbyqxmd.com/read/28283674/endometrial-transcriptome-in-recurrent-miscarriage-and-recurrent-implantation-failure
#10
Jin Huang, Hao Qin, Yihua Yang, Xiaoyan Chen, Jiamiao Zhang, Susan Laird, Chi Chiu Wang, Ting Fung Chan, Tin Chiu Li
The endometrium becomes receptive to the embryo only in the mid-luteal phase, but not other stages of the menstrual cycle. Endometrial factors play an important role in implantation. Women with recurrent miscarriage and recurrent implantation failure have both been reported to have altered expression of receptivity markers during the window of implantation. We aimed to compare the gene expression profiles of the endometrium in the window of implantation among women with unexplained recurrent implantation failures (RIF) and unexplained recurrent miscarriages (RM) by RNA sequencing (RNA-Seq)...
March 10, 2017: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/28281441/miliary-tuberculosis
#11
Surendra K Sharma, Alladi Mohan
Miliary tuberculosis (TB) results from a massive lymphohematogenous dissemination of Mycobacterium tuberculosis bacilli and is characterized by tiny tubercles evident on gross pathology resembling millet seeds in size and appearance. The global HIV/AIDS pandemic and widespread use of immunosuppressive drugs and biologicals have altered the epidemiology of miliary TB. Considered to be predominantly a disease of infants and children in the pre-antibiotic era, miliary TB is increasingly being encountered in adults as well...
March 2017: Microbiology Spectrum
https://www.readbyqxmd.com/read/28281258/reflectometric-interference-spectroscopy
#12
Guenther Proll, Goran Markovic, Peter Fechner, Florian Proell, Guenter Gauglitz
Reflectometry is classified in comparison to the commercialized refractometric surface plasmon resonance. The advantages of direct optical detection depend on a sophisticated surface chemistry resulting negligible nonspecific binding and high loading with recognition sites at the biopolymer sensitive layer of the transducer. Elaborate details on instrumental realization and surface chemistry are discussed for optimum application of reflectometric interference spectroscopy (RIfS). A standard protocol for a binding inhibition assay is given...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28280745/medication-adherence-mediates-the-association-between-type-d-personality-and-high-hba1c-level-in-chinese-patients-with-type-2-diabetes-mellitus-a-six-month-follow-up-study
#13
Xuemei Li, Min Gao, Shengfa Zhang, Huiwen Xu, Huixuan Zhou, Xiaohua Wang, Zhiyong Qu, Jing Guo, Weijun Zhang, Donghua Tian
Aims. To examine the association between Type D personality and HbA1c level and to explore the mediating role of medication adherence between them in patients with type 2 diabetes mellitus (T2DM). Methods. 330 patients went on to complete a self-report measure of medication adherence and the HbA1c tests. Chi-square test, T test, Ordinary Least Square Regression (OLS), and Recentered Influence Function Regression (RIF) were employed. Results. Patients with Type D personality had significantly higher HbA1c value (P < 0...
2017: Journal of Diabetes Research
https://www.readbyqxmd.com/read/28277228/utility-of-phenotypic-and-genotypic-testing-in-the-study-of-mycobacterium-tuberculosis-resistance-to-first-line-anti-tuberculosis-drugs
#14
Luz María Alba Álvarez, José María García García, M Dolores Pérez Hernández, Susana Martínez González, Juan José Palacios Gutiérrez
OBJECTIVE: To determine the utility of molecular techniques in the diagnosis of resistance and the extent of resistance to first-line drugs in our region. MATERIAL AND METHOD: From 2004 to 2013, 1,889 strains of Mycobacterium tuberculosis complex isolated in Asturias, Spain, were studied using phenotypic (Clinical and Laboratory Standards Institute guidelines) and molecular (INNOLiPA RIF-TB(©); GenotypeMDRplus(©); GenotypeMDRsl(©)) sensitivity tests. RESULTS: 1,759 strains (94...
October 27, 2016: Archivos de Bronconeumología
https://www.readbyqxmd.com/read/28275073/rapid-detection-of-cell-free-mycobacterium-tuberculosis-dna-in-tuberculous-pleural-effusion
#15
Nanying Che, Xinting Yang, Zichen Liu, Kun Li, Xiaoyou Chen
Tuberculous pleurisy is one of the most common extra-pulmonary tuberculosis, but its diagnosis remains to be difficult. In this study, we for the first time report detection of cell-free Mycobacterium tuberculosis DNA in pleural effusion and evaluation of this newly developed molecular assay. A total of 78 patients with pleural effusion, 60 patients with tuberculous pleurisy and 18 patients with alternative diseases, were included in this study. Mycobacterial culture, Xpert MTB/RIF assay, adenosine deaminase assay, T-SPOT...
March 8, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28258004/evaluation-of-genexpert-mtb-rif-for-detection-of-pulmonary-tuberculosis-at-peripheral-tuberculosis-clinics
#16
Yan Shao, Hong Peng, Cheng Chen, Tao Zhu, Ming Ji, Wei Jiang, Wei Zhu, Xiang Jun Zhai, Wei Lu
Tuberculosis is one of the most common infectious diseases in China, while delayed patient finding obstructed disease control, especially for smear-negative patients. The current study was undertaken to evaluate the diagnostic accuracy of GeneXpert MTB/RIF compared with conventional methods in the detection of pulmonary tuberculosis patients. A total of 295 spot sputum samples from confirmed pulmonary tuberculosis patients were evaluated from September 2014 to June 2015. Each sample was examined by acid-fast bacillus smear microscopy, culture and GeneXpert MTB/RIF...
February 28, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28249999/utility-of-second-generation-line-probe-assay-hain-mtbdrplus-directly-on-2-month-sputa-specimens-to-monitor-tuberculosis-treatment-response
#17
Neesha Rockwood, Justyna Wojno, Yonas Ghebrekristos, Mark P Nicol, Graeme Meintjes, Robert J Wilkinson
The utility of line probe assay (Genotype MTBDRplus) performed directly on 2-month sputa to monitor tuberculosis treatment response is unknown. We assessed if direct testing of 2-month sputa with MTBDRplus can predict 2-month culture conversion and long-term treatment outcome. Xpert® MTB/RIF-confirmed rifampicin-susceptible tuberculosis cases were recruited at tuberculosis diagnosis and followed up at 2 and 5-6 months. MTBDRplus was performed directly on 2-month sputa and on all positive culture isolates at 2 and 5-6 months...
March 1, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28243227/rifampicin-resistance-mutations-in-the-rpob-gene-in-bacillus-velezensis-cc09-have-pleiotropic-effects
#18
Xun-Chao Cai, Huan Xi, Li Liang, Jia-Dong Liu, Chang-Hong Liu, Ya-Rong Xue, Xiang-Yang Yu
Rifampicin resistance (Rif(r)) mutations in the RNA polymerase β subunit (rpoB) gene exhibit pleiotropic phenotypes as a result of their effects on the transcription machinery in prokaryotes. However, the differences in the effects of the mutations on the physiology and metabolism of the bacteria remain unknown. In this study, we isolated seven Rif(r) mutations in rpoB, including six single point mutations (H485Y, H485C, H485D, H485R, Q472R, and S490L) and one double point mutation (S490L/S617F) from vegetative cells of an endophytic strain, Bacillus velezensis CC09...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28240862/engineering-of-surface-chemistry-for-enhanced-sensitivity-in-nanoporous-interferometric-sensing-platforms
#19
Cheryl Suwen Law, Georgina M Sylvia, Madieh Nemati, Jingxian Yu, Dusan Losic, Andrew D Abell, Abel Santos
We explore new approaches to engineering the surface chemistry of interferometric sensing platforms based on nanoporous anodic alumina (NAA) and reflectometric interference spectroscopy (RIfS). Two surface engineering strategies are presented, namely (i) selective chemical functionalization of the inner surface of NAA pores with amine-terminated thiol molecules and (ii) selective chemical functionalization of the top surface of NAA with dithiol molecules. The strong molecular interaction of Au(3+) ions with thiol-containing functional molecules of alkane chain or peptide character provides a model sensing system with which to assess the sensitivity of these NAA platforms by both molecular feature and surface engineering...
March 6, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28239559/gene-profiling-the-window-of-implantation-microarray-analyses-from-human-and-rodent-models
#20
Jennifer L Herington, Yan Guo, Jeff Reese, Bibhash C Paria
Poor uterine receptivity leads to implantation defects or failure. Identification of uterine molecules crucial to uterine receptivity and/or embryo implantation provides the opportunity to design a diagnostic screening toolkit for uterine receptivity or targeted drug discovery for treating implantation-based infertility. In this regard, gene-profiling studies performed in humans and rodents have identified numerous genes involved in the transcriptional regulation of uterine receptivity and embryo implantation...
December 2016: J Reprod Health Med
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