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https://www.readbyqxmd.com/read/28330890/direct-detection-of-rifampicin-and-isoniazid-resistance-in-sputum-samples-from-tuberculosis-patients-by-high-resolution-melt-curve-analysis
#1
Divya Anthwal, Rakesh Kumar Gupta, Manpreet Bhalla, Shinjini Bhatnagar, Jaya Sivaswami Tyagi, Sagarika Haldar
Drug-resistant tuberculosis (TB) is a major threat for TB control worldwide. Globally, only 40% of the 340,000 notified TB patients estimated to have multidrug resistant-TB (MDR-TB) were detected in 2015. This study was carried out to evaluate the utility of High Resolution Melt curve analysis (HRM) for the rapid and direct detection of MDR-TB in Mycobacterium tuberculosis (M. tb) in sputum samples. A reference plasmid library was first generated of the most frequently observed mutations in the resistance determining regions of rpoB, katG and inhA promoter and used as positive controls in HRM...
March 22, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28317813/association-between-pulmonary-tuberculosis-and-type-2-diabetes-in-sudanese-patients
#2
Mona Ahmed, Ibtihal Omer, Sannaa M A Osman, Eltayib H Ahmed-Abakur
INTRODUCTION: Tuberculosis (TB) and diabetes mellitus (DM) are both important health issues, and the association between DM and TB may be the next challenge for global TB control worldwide, type 2 DM (T2DM) responsible for 90% of DM cases. Persons with diabetes have a significantly increased risk of active TB, which is two to three times higher than in persons without diabetes. The aim of this study was to determine the association between pulmonary tuberculosis (PTB) and T2DM among Sudanese patients and also to determine the association between hemoglobin A1c (HbA1c) percentage in diabetic patients and development of PTB and effect of duration of T2DM in developing PTB...
January 2017: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28302528/association-between-enteric-protozoan-parasites-and-gastrointestinal-illness-among-hiv-and-tuberculosis-infected-individuals-in-the-chowke-district-southern-mozambique
#3
María José Irisarri-Gutiérrez, Marta Hernández-de Mingo, Aida de Lucio, Horacio Gil, Lucía Morales, Raimundo Seguí, Edy Nacarapa, Carla Muñoz-Antolí, Fernando Jorge Bornay-Llinares, José Guillermo Esteban, David Carmena
Human immune deficiency virus (HIV) and tuberculosis (TB) infections remain major public health issues globally, particularly in sub-Saharan Africa. Impairment of both cell-mediated and humoral immunity by HIV and/or TB infections may limit the host's defences against other pathogens, including the diarrheagenic protozoan Cryptosporidium spp., Giardia intestinalis, and Entamoeba histolytica. During September-December 2015 a cross-sectional study was conducted to assess the prevalence and molecular diversity of these enteric parasites among HIV- and/or TB-infected patients at a medical reference centre in Chowke district, southern Mozambique...
March 14, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28289388/hla-b-57-allele-is-associated-with-concomitant-anti-tuberculosis-and-antiretroviral-drugs-induced-liver-toxicity-in-ethiopians
#4
Zelalem Petros, Junko Kishikawa, Eyasu Makonnen, Getnet Yimer, Abiy Habtewold, Eleni Aklillu
Drug-induced liver injury (DILI) is a known adverse effect of both anti-tuberculosis (anti-TB) and antiretroviral (ARV) drugs. Recent studies highlight the implications of genetic predispositions to DILI. We performed a case-control study to identify Human Leukocyte Antigen-B (HLA-B) variant alleles associated with anti-TB and ARV co-treatment induced liver toxicity in Ethiopian TB and HIV co-infected patients. A total of 495 newly diagnosed TB and HIV co-infected patients were enrolled and received rifampicin based anti-TB and efavirenz based ARV therapy...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28285168/design-and-use-of-mouse-control-dna-for-dna-biomarker-extraction-and-pcr-detection-from-urine-application-for-transrenal-mycobacterium-tuberculosis-dna-detection
#5
Hali Bordelon, Keersten M Ricks, Megan E Pask, Patricia K Russ, Francesca Solinas, Mark L Baglia, Philip A Short, Andrew Nel, Jonathan Blackburn, Keertan Dheda, Carlos Zamudio, Tatiana Cáceres, David W Wright, Frederick R Haselton, April C Pettit
Urine samples are increasingly used for diagnosing infections including Escherichia coli, Ebola virus, and Zika virus. However, extraction and concentration of nucleic acid biomarkers from urine is necessary for many molecular detection strategies such as polymerase chain reaction (PCR). Since urine samples typically have large volumes with dilute biomarker concentrations making them prone to false negatives, another impediment for urine-based diagnostics is the establishment of appropriate controls particularly to rule out false negatives...
March 9, 2017: Journal of Microbiological Methods
https://www.readbyqxmd.com/read/28279827/luminescence-sensitization-of-tb-3-dna-complexes-by-ag
#6
Lijun Xu, Lu Zhou, Xing Chen, Xiaoqiang Shen, Jine Wang, Jianye Zhang, Renjun Pei
Terbium ions (Tb(3+)) with unique photophysical properties have been utilized to develop biosensors with low background and high sensitivity. In this study, the Ag(+)-sensitized luminescence of Tb(3+)-DNA complexes was uncovered. The luminescence of Tb(3+)-DNA complexes could be enhanced by more than 30 times in the presence of Ag(+), when Tb(3+) was bound with poly(G) and poly(T) whereas not with other homopolymers. This research confirmed that the sensitization resulted from the interaction of Ag(+) with certain bases involved in DNA, not just with the reported certain G-quadruplex sequence...
March 3, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28275074/same-day-diagnostic-and-surveillance-data-for-tuberculosis-via-whole-genome-sequencing-of-direct-respiratory-samples
#7
Antonina A Votintseva, Phelim Bradley, Louise Pankhurst, Carlos Del Ojo Elias, Matthew Loose, Kayzad Nilgiriwala, Anirvan Chatterjee, E Grace Smith, Nicolas Sanderson, Timothy M Walker, Marcus R Morgan, David H Wyllie, A Sarah Walker, Tim E A Peto, Derrick W Crook, Zamin Iqbal
Routine full characterization of Mycobacterium tuberculosis (TB) is culture-based, taking many weeks. Whole-genome sequencing (WGS) can generate antibiotic susceptibility profiles to inform treatment, augmented with strain information for global surveillance; such data could be transformative if provided at or near point of care.We demonstrate a low-cost DNA extraction method for TB WGS direct from patient samples. We initially evaluated the method using the Illumina MiSeq sequencer (40 smear-positive respiratory samples, obtained after routine clinical testing, and 27 matched liquid cultures)...
March 8, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28275073/rapid-detection-of-cell-free-mycobacterium-tuberculosis-dna-in-tuberculous-pleural-effusion
#8
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/28241799/immunogenicity-and-therapeutic-effects-of-a-mycobacterium-tuberculosis-rv2190c-dna-vaccine-in-mice
#9
Yan Liang, Xiaoyan Zhang, Xuejuan Bai, Li Xiao, Xiaomei Wang, Junxian Zhang, Yourong Yang, Jinying Song, Lan Wang, Xueqiong Wu
BACKGROUND: Tuberculosis (TB) is a major global public health problem. New treatment methods on TB are urgently demanded. In this study, Mycobacterium tuberculosis (MTB) rv2190c DNA vaccine was prepared and its immunogenicity and therapeutic effects were evaluated. RESULTS: Non-infected mice immunized with rv2190c DNA or ag85a DNA showed higher levels of interferon-gamma (IFN-γ) in stimulated spleen lymphocyte culture supernatants, and had more Th1 cells and an elevatory ratio of Th1/Th2 immune cells in whole blood, indicating that Th1-type immune response was predominant...
February 27, 2017: BMC Immunology
https://www.readbyqxmd.com/read/28237036/mycobacterium-tuberculosis-rv1474c-is-a-tetr-like-transcriptional-repressor-that-regulates-aconitase-an-essential-enzyme-and-rna-binding-protein-in-an-iron-responsive-manner
#10
Kannan Balakrishnan, Krishnaveni Mohareer, Sharmistha Banerjee
Mycobacterium tuberculosis (M.tb), tuberculosis (TB) causing bacteria, employs several mechanisms to maintain iron homeostasis which is critical for its survival and pathogenesis. M.tb aconitase (Acn), a [4Fe-4S] cluster-containing essential protein, apart from participating in energy cycle, also binds to predicted iron-responsive RNA elements. In this study, we identified Rv1474c as a regulator of its operonic partner acn and carried out its biochemical and functional characterization. The binding motif for Rv1474c in the upstream region of acn (Rv1475c)-Rv1474c operon was verified by gel-shift assays...
March 2017: Tuberculosis
https://www.readbyqxmd.com/read/28224119/vesicular-stomatitis-virus-vectored-multi-antigen-tuberculosis-vaccine-limits-bacterial-proliferation-in-mice-following-a-single-intranasal-dose
#11
Ming Zhang, Chunsheng Dong, Sidong Xiong
Tuberculosis (TB) remains a serious health problem worldwide, and an urgent need exists to improve or replace the available vaccine, Mycobacterium bovis bacillus Calmette-Guérin (BCG). Most vaccination protocols adapt two or three doses to induce long-term lasting immunity. Our previous study showed that the naked DNA encoding the triple-antigen fusion TFP846 (Rv3615c-Mtb10.4-Rv2660c) induced robust T cellular immune responses accompanying four inoculations against mycobacteria infection. However, a number of compliance issues exist in some areas lacking the appropriate medical infrastructure with multiple administrations...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28217253/miliary-tuberculosis-infection-during-hepatitis-c-treatment-with-sofosbuvir-and-ledipasvir-plus-ribavirin
#12
Maria Pilar Ballester-Ferré, Fernando Martínez, Natalia Garcia-Gimeno, Francisco Mora, Miguel A Serra
Chronic hepatitis C virus (HCV) infection is one of the main causes of chronic liver disease worldwide. In the last 5 years, treatment for HCV infection has experienced a marked development. In 2014, the use of ledipasvir/sofosbuvir with or without concomitant weight-based ribavirin was approved with a very significant increase in the sustained virological response. However, new side effects have been associated. We report the first case of an HCV infected patient treated for 12 wk with the combination of sofosbuvir/ledipasvir plus ribavirin who developed a miliary tuberculosis (TB) infection while on therapy...
January 28, 2017: World Journal of Hepatology
https://www.readbyqxmd.com/read/28217140/evaluation-of-polymerase-chain-reaction-in-space-occupying-lesions-of-liver-reported-as-granulomatous-inflammation-tuberculosis-on-fine-needle-aspiration-cytology
#13
Kusum Sharma, Nalini Gupta, Kapil Goyal, Ajay Kumar Duseja, Aman Sharma, Arvind Rajwanshi
BACKGROUND: Tubercular involvement of the liver is uncommon, but is a serious consideration in differential diagnosis of granulomatous conditions, especially in endemic regions like India. OBJECTIVE: To assess the role of polymerase chain reaction (PCR) done on archival cytological material in diagnosing tuberculosis (TB) in cases reported as granulomatous inflammation/TB in liver lesions. MATERIALS AND METHODS: This was a retrospective study including a total of 17 cases of liver space-occupying lesions (SOLs) reported as granulomatous inflammation (n = 12) and TB (n = 5)...
2017: CytoJournal
https://www.readbyqxmd.com/read/28177043/performance-of-a-molecular-assay-to-detect-mycobacterium-tuberculosis-complex-dna-in-clinical-specimens-multicenter-study-in-brazil
#14
Mirela Verza, Karen Barros Schmid, Regina Bones Barcellos, Natali Linck, Graziele Lima Bello, Daniel Scapin, Rosa Dea Sperhacke, Márcia Susana Nunes Silva, Claudia Wollheim, Martha Gabriela Celle Rivero, Afrânio Lineu Kritski, Leonides Rezende, Martha Maria Oliveira, Elis Regina Dalla Costa, Maria Lucia Rosa Rossetti
BACKGROUND: In high tuberculosis (TB) burden countries, there are few data on the performance of new molecular commercialised assays developed locally. OBJECTIVE: To evaluate the performance of a new molecular commercialised assay for TB diagnosis (Detect-TB) in three laboratories. METHODS: A total of 302 sputum samples from an equal number of patients with presumptive diagnosis of pulmonary tuberculosis (PTB) were submitted for routine smear microscopy, culture, and Detect-TB assay at three different sites in Brazil (the cities of Caxias do Sul, São Paulo and Canoas)...
February 2017: Memórias do Instituto Oswaldo Cruz
https://www.readbyqxmd.com/read/28166914/role-of-anti-tubercular-treatment-for-positive-endometrial-aspirate-dna-pcr-reproductive-outcome-in-infertile-patients-in-indian-setting-a-randomized-trial
#15
A Kriplani, A Bahadur, V Kulshrestha, N Agarwal, S Singh, U B Singh
AIMS: The aim of the study was to determine the effect of anti-tubercular therapy (ATT) versus no ATT on reproductive outcome in patients with positive endometrial aspirate DNA-PCR for tuberculosis. SETTINGS AND DESIGN: Department of Obstetrics and Gynecology in collaboration with the Department of Microbiology at the All India Institute of Medical Sciences, New Delhi, India. METHODS AND MATERIALS: This prospective randomized study was conducted on 100 women in the reproductive age group with primary or secondary infertility, attending the Gynecology OPD at AIIMS...
January 2017: Indian Journal of Tuberculosis
https://www.readbyqxmd.com/read/28161108/rv0774c-an-iron-stress-inducible-extracellular-esterase-is-involved-in-immune-suppression-associated-with-altered-cytokine-and-tlr2-expression
#16
Arbind Kumar, Sukh Mahendra Singh, Ranvir Singh, Jagdeep Kaur
Tuberculosis, one of the leading cause of death from infectious diseases, is caused by Mycobacterium tuberculosis. The genome of M. tuberculosis has been sequenced and nearly 40% of the whole genome sequence was categorized as hypothetical. Rv0774c was annotated as membrane exported hypothetical protein in TB database. In silico analysis revealed that Rv0774c is a paralog of PE-PGRS multi gene family with 100 aa N-terminal domain similar to PE domain of PE-PGRS proteins. Its C-terminal domain is quite different from PGRS domain, having characteristic lipase signature GXSXG & HG and catalytic residues predicted for lipolytic activity...
February 2017: International Journal of Medical Microbiology: IJMM
https://www.readbyqxmd.com/read/28159577/a-tuberculosis-biomarker-database-the-key-to-novel-tb-diagnostics
#17
REVIEW
Seda Yerlikaya, Tobias Broger, Emily MacLean, Madhukar Pai, Claudia M Denkinger
New diagnostic innovations for tuberculosis (TB), including point-of-care solutions, are critical to reach the goals of the End TB Strategy. However, despite decades of research, numerous reports on new biomarker candidates, and significant investment, no well-performing, simple and rapid TB diagnostic test is yet available on the market, and the search for accurate, non-DNA biomarkers remains a priority. To help overcome this 'biomarker pipeline problem', FIND and partners are working on the development of a well-curated and user-friendly TB biomarker database...
January 31, 2017: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/28115796/evaluation-of-rapid-genexpert-mtb-rif-method-using-dna-tissue-specimens-of-vertebral-bones-in-patients-with-suspected-spondylitis-tb
#18
Muhammad Nasrum Massi, Karya Triko Biatko, Irda Handayani, Muhammad Yogi Pratama, Sari Septriani, Gaby Maulida Nurdin, Marina B Ali
PURPOSE: To detect Mycobacterium tuberculosis DNA and rifampicin resistance in vertebral bone tissue specimens from spondylitis TB suspects. METHODS AND RESULTS: The rapid GeneXpert MTB/RIF and MGIT 960 liquid culture methods have been used in the specimens. Results from 70 suspects with spondylitis TB shown that 31.42% identified positive for spondylitis TB using culture method, while 88.57% shown positive results using rapid GeneXpert MTB/RIF method. The validity of GeneXpert MTB/RIF shown sensitivity value of 100%, specificity value of 16...
March 2017: Journal of Orthopaedics
https://www.readbyqxmd.com/read/28112131/polymerase-chain-reaction-for-mycobacterium-tuberculosis-dna-detection-from-ocular-fluids-in-patients-with-various-types-of-choroiditis-in-a-referral-eye-center-in-india
#19
Jyotirmay Biswas, Mohmmad Salman Kazi, Vishvesh Ashokkumar Agarwal, Md Shahid Alam, K Lily Therese
AIMS: The aim of this study was to detect Mycobacterium tuberculosis (MTB) DNA with polymerase chain reaction (PCR) in aqueous or vitreous samples of patients suffering from choroiditis presumed to be infectious origin. SETTINGS AND DESIGN: Hospital-based, retrospective case-control study. SUBJECTS AND METHODS: In all, forty eyes of forty patients with choroiditis divided into two groups - Group A (serpiginous-like choroiditis, ampiginous choroiditis, multifocal choroiditis) and Group B (choroidal abscess, miliary tuberculosis (TB), choroidal tubercle) were analyzed retrospectively...
December 2016: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/28109130/identification-of-promising-dna-gyrb-inhibitors-for-tuberculosis-using-pharmacophore-based-virtual-screening-molecular-docking-and-molecular-dynamics-studies
#20
Md Ataul Islam, Tahir S Pillay
In this study, we searched for potential DNA GyrB inhibitors using pharmacophore-based virtual screening followed by molecular docking and molecular dynamics simulation approaches. For this purpose, a set of 248 DNA GyrB inhibitors was collected from the literature and a well-validated pharmacophore model was generated. The best pharmacophore model explained that two each of hydrogen bond acceptors and hydrophobicity regions were critical for inhibition of DNA GyrB. Good statistical results of the pharmacophore model indicated that the model was robust in nature...
January 21, 2017: Chemical Biology & Drug Design
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