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Beijing genotype and mycobacterium tuberculosis

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https://www.readbyqxmd.com/read/28214557/quadruple-first-line-drug-resistance-in-mycobacterium-tuberculosis-in-vietnam-what-can-we-learn-from-genes
#1
Huy Quang Nguyen, Nhung Viet Nguyen, Lucie Contamin, Thanh Hoa Thi Tran, Thuong Thi Vu, Hung Van Nguyen, Ngoc Lan Thi Nguyen, Son Thai Nguyen, Anh Duc Dang, Anne-Laure Bañuls, Van Anh Thi Nguyen
In Vietnam, a country with high tuberculosis (137/100.000 population) and multidrug-resistant (MDR)-TB burdens (7.8/100.000 population), little is known about the molecular signatures of drug resistance in general and more particularly of second line drug (SLD) resistance. This study is specifically focused on Mycobacterium tuberculosis isolates resistant to four first-line drugs (FLDs) that make TB much more difficult to treat. The aim is to determine the proportion of SLD resistance in these quadruple drug resistant isolates and the genetic determinants linked to drug resistance to better understand the genetic processes leading to quadruple and extremely drug resistance (XDR)...
February 15, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/28201993/structure-and-variation-of-crispr-and-crispr-flanking-regions-in-deleted-direct-repeat-region-mycobacterium-tuberculosis-complex-strains
#2
Paul Jeffrey Freidlin, Israel Nissan, Anna Luria, Drora Goldblatt, Lana Schaffer, Hasia Kaidar-Shwartz, Daniel Chemtob, Zeev Dveyrin, Steven Robert Head, Efrat Rorman
BACKGROUND: CRISPR and CRISPR-flanking genomic regions are important for molecular epidemiology of Mycobacterium tuberculosis complex (MTBC) strains, and potentially for adaptive immunity to phage and plasmid DNA, and endogenous roles in the bacterium. Genotyping in the Israel National Mycobacterium Reference Center Tel-Aviv of over 1500 MTBC strains from 2008-2013 showed three strains with validated negative 43-spacer spoligotypes, that is, with putatively deleted direct repeat regions (deleted-DR/CRISPR regions)...
February 15, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28182078/difference-in-antibody-responses-to-mycobacterium-tuberculosis-antigens-in-japanese-tuberculosis-patients-infected-with-the-beijing-non-beijing-genotype
#3
Jingge Zhao, Beata Shiratori, Masao Okumura, Hideki Yanai, Makoto Matsumoto, Chie Nakajima, Kazue Mizuno, Kenji Ono, Tetsuya Oda, Haorile Chagan-Yasutan, Yugo Ashino, Takashi Matsuba, Takashi Yoshiyama, Yasuhiko Suzuki, Toshio Hattori
The Beijing genotype Mycobacterium tuberculosis (MTB), notorious for its virulence and predisposition to relapse, could be identified by spoligotyping based on genetic heterogeneity. The plasma samples from 20 cases of Beijing and 16 cases of non-Beijing MTB infected individuals and 24 healthy controls (HCs) were collected, and antibodies against 11 antigens (Rv0679c142Asn, Rv0679c142Lys, Ag85B, Ag85A, ARC, TDM-M, TDM-K, HBHA, MDP-1, LAM, and TBGL) were measured by ELISA. Compared to the HCs, the MTB infected subjects showed higher titers of anti-Ag85B IgG (positivity 58...
2017: Journal of Immunology Research
https://www.readbyqxmd.com/read/28043622/emerging-clones-of-mycobacterium-tuberculosis-in-russia-and-former-soviet-union-countries-beijing-genotype-and-beyond
#4
Igor Mokrousov
No abstract text is available yet for this article.
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28043579/deletion-of-region-of-difference-181-in-mycobacterium-tuberculosis-beijing-strains
#5
Ehsan Sharifipour, Parissa Farnia, Mohadeseh Mozafari, Shiva Irani, Ali Akbar Velayati
OBJECTIVES/BACKGROUND: The region of differences (RDs) polymorphisms is a potential molecular epidemiology method to distinguish origins of Mycobacterium tuberculosis. To date, 68 RDs have been identified in M. tuberculosis. This study was designed to determine the frequency of RD deletions in M. tuberculosis strains that were isolated from patients with pulmonary tuberculosis who were referred to the National Research Institute of Tuberculosis and Lung Disease for diagnosis and treatment...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28043550/predominance-of-beijing-lineage-among-pre-extensively-drug-resistant-and-extensively-drug-resistant-strains-of-mycobacterium-tuberculosis-a-tertiary-care-center-experience
#6
Syed Beenish Rufai, Manimuthu Mani Sankar, Jitendra Singh, Sarman Singh
OBJECTIVE/BACKGROUND: Increasing resistance to various first-line and second-line drugs has become a major concern in India. However, it is not known if some genotypes are more associated with second-line drug resistance. Thus, the main aim of this study was to find out the predominant genotype associated with second-line drug resistance. METHODS: During the study, a total of 234 multidrug resistant (MDR) strains of Mycobacterium tuberculosis, isolated between 2008 and 2015, were randomly selected and screened for pre-extensively drug-resistant (XDR) and XDR patterns using second-drug susceptibility testing with BACTEC MGIT 960...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28043502/genotypic-analysis-of-multidrug-resistant-tuberculosis-isolates-from-extra-pulmonary-tuberculosis-cases-in-tertiary-care-centers-in-northern-india
#7
Anand K Maurya, Vijaya L Nag, Surya Kant, Ramawadh S Kushwaha, Tapan N Dhole
OBJECTIVE/BACKGROUND: Multidrug-resistant tuberculosis (MDR-TB) is a major public health problem. The diagnosis of MDR-TB is of paramount importance in establishing appropriate clinical management and infection control measures. Rapid detection of MDR-TB allows the establishment of an effective treatment regimen, minimizes the risk of further resistance, and limits the spread of drug-resistant strains. The aim of this study is to determine the genotypic characterization of MDR-TB isolates from extra pulmonary tuberculosis (EPTB) cases in tertiary care centers in Northern India...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28043501/comparative-proteomic-analysis-of-sequential-isolates-of-mycobacterium-tuberculosis-sensitive-and-resistant-beijing-type-from-a-patient-with-pulmonary-tuberculosis
#8
Amit Singh, Anil Kumar Gupta, Krishnamoorthy Gopinath, Divakar Sharma, Prashant Sharma, Deepa Bisht, Pawan Sharma, Sarman Singh
AIM & OBJECTIVE: In India, tuberculosis (TB) is a foremost health problem, and the emergence of multidrug-resistant (MDR) and extensively drug resistant (XDR) strains of Mycobacterium tuberculosis (M. tuberculosis) has further complicated the situation. Although various mechanisms have been proposed to elucidate the emergence of resistance, our knowledge remains insufficient. The formation of a very complex network and drugs of proteins are countered by their efflux/modification or target over-expression/modification...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/27995145/a-first-insight-into-the-genetic-diversity-and-drug-susceptibility-pattern-of-mycobacterium-tuberculosis-complex-in-zhejiang-china
#9
Zhengwei Liu, Yu Pang, Songhua Chen, Beibei Wu, Haibo He, Aizhen Pan, Xiaomeng Wang
In this study, our aim was to determine the predominant genotypes among the Mycobacterium tuberculosis (MTB) strains circulating in Zhejiang Province. In addition, we also sought to determine the potential associations between MTB genotypes and susceptibility to first-line drugs. Out of these isolates, 673 (71.6%) were classified into the Beijing genotype, while the other 267 (28.4%) were from non-Beijing families. The highest proportion of Beijing genotype was found in Huzhou (80.0%) and the lowest in Lishui (48...
2016: BioMed Research International
https://www.readbyqxmd.com/read/27919887/genotyping-and-prevalence-of-pyrazinamide-and-moxifloxacin-resistant-tuberculosis-in-china-2000-to-2010
#10
Yu Pang, Zhijian Zhang, Yufeng Wang, Shengfen Wang, Yuanyuan Song, Bing Zhao, Yang Zhou, Xichao Ou, Qiang Li, Hui Xia, Yang Zheng, Xiangqun Fang, Yanlin Zhao
We investigated the prevalence, trends, and risk factors for pyrazinamide (PZA) and moxifloxacin (MOX) resistance among tuberculosis (TB) cases in China and also analyzed the population structure of Mycobacterium tuberculosis strains. All the M. tuberculosis strains enrolled in this study were collected from the national TB prevalence surveys. Each strain was genotyped by analyzing the regions of RD105 and IS6110 in the NTF region. The Bactec MGIT 960 system was used to detect the drug susceptibility of M. tuberculosis isolates to PZA and MOX...
February 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/27891336/mycobacterium-tuberculosis-beijing-genotype-in-western-iran-distribution-and-drug-resistance
#11
Parviz Mohajeri, Sakineh Moradi, Sara Atashi, Abbas Farahani
INTRODUCTION: Mycobacterium tuberculosis Beijing genotype is gaining importance all over the world because this genotype is highly prevalent in several areas and is also frequently associated with drug resistance. AIM: To identify and determine the frequency of Beijing genotype and mix infection with Beijing and non-Beijing in west of Iran and analyse the association between Beijing genotype and drug resistance. MATERIALS AND METHODS: This cross-sectional study was conducted on 146 Tuberculosis (TB) samples collected at the TB reference laboratory in Kermanshah west of Iran from January 2014 to February 2015, Mycobacterium tuberculosis isolates from sputum samples, detected by microcopy, biochemical tests and solid culture were included and then the confirmed samples with Cepheid Xpert MTB/RIF assay were subjected to drug susceptibility tests for rifampicin, isoniazid, ethambutol using proportional method...
October 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27865397/transmission%C3%A2-of-multi-drug-resistant-tuberculosis-in-mongolia-is-driven-by-beijing-strains-of-mycobacterium-tuberculosis-resistant-to-all-first-line-drugs
#12
Ulziijargal Gurjav, Baasansuren Erkhembayar, Buyankhishig Burneebaatar, Erdenegerel Narmandakh, Oyuntuya Tumenbayar, Grant A Hill-Cawthorne, Ben J Marais, Vitali Sintchenko
BACKGROUND: Mongolia has high and rising rates of multi-drug resistant tuberculosis (MDR-TB). Spatio-temporal and programmatic evidence suggests a major contribution from MDR-TB transmission, but genotypic evidence has not been assessed. METHODS: All MDR-TB cases identified during 2012 were examined. Demographic and bacteriological data were obtained from the National Tuberculosis Reference Laboratory. Isolates of Mycobacterium tuberculosis from culture-confirmed category 1 treatment failures were genotyped using 24-loci mycobacterium interspersed repetitive unit (MIRU-24) analysis...
December 2016: Tuberculosis
https://www.readbyqxmd.com/read/27853145/marco-variants-are-associated-with-phagocytosis-pulmonary-tuberculosis-susceptibility-and-beijing-lineage
#13
N T T Thuong, T T B Tram, T D Dinh, P V K Thai, D Heemskerk, N D Bang, T T H Chau, D G Russell, G E Thwaites, T R Hawn, M Caws, S J Dunstan
Macrophage receptor with collagenous structure (MARCO) has an important role in the phagocytosis of Mycobacterium tuberculosis (M. tuberculosis). We hypothesized that MARCO polymorphisms are associated with phagocytosis, tuberculosis (TB) disease susceptibility and presentation, and infecting lineage. We used a human cellular model to examine how MARCO genotype mediates the immune response; a case-control study to investigate tuberculosis host genetic susceptibility; and a host-pathogen genetic analysis to study host-pathogen interactions...
December 2016: Genes and Immunity
https://www.readbyqxmd.com/read/27737005/whole-genome-sequencing-demonstrates-limited-transmission-within-identified-mycobacterium-tuberculosis-clusters-in-new-south-wales-australia
#14
Ulziijargal Gurjav, Alexander C Outhred, Peter Jelfs, Nadine McCallum, Qinning Wang, Grant A Hill-Cawthorne, Ben J Marais, Vitali Sintchenko
Australia has a low tuberculosis incidence rate with most cases occurring among recent immigrants. Given suboptimal cluster resolution achieved with 24-locus mycobacterium interspersed repetitive unit (MIRU-24) genotyping, the added value of whole genome sequencing was explored. MIRU-24 profiles of all Mycobacterium tuberculosis culture-confirmed tuberculosis cases diagnosed between 2009 and 2013 in New South Wales (NSW), Australia, were examined and clusters identified. The relatedness of cases within the largest MIRU-24 clusters was assessed using whole genome sequencing and phylogenetic analyses...
2016: PloS One
https://www.readbyqxmd.com/read/27729644/risk-factors-for-pulmonary-cavitation-in-tuberculosis-patients-from-china
#15
Liqun Zhang, Yu Pang, Xia Yu, Yufeng Wang, Jie Lu, Mengqiu Gao, Hairong Huang, Yanlin Zhao
Pulmonary cavitation is one of the most frequently observed clinical characteristics in tuberculosis (TB). The objective of this study was to investigate the potential risk factors associated with cavitary TB in China. A total of 385 smear-positive patients were enrolled in the study, including 192 (49.9%) patients with cavitation as determined by radiographic findings. Statistical analysis revealed that the distribution of patients with diabetes in the cavitary group was significantly higher than that in the non-cavitary group (adjusted odds ratio (OR) (95% confidence interval (CI)):12...
October 12, 2016: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/27726798/the-evolutionary-history-demography-and-spread-of-the-mycobacterium-tuberculosis-complex
#16
Maxime Barbier, Thierry Wirth
With the advent of next-generation sequencing technology, the genotyping of clinical Mycobacterium tuberculosis strains went through a major breakup that dramatically improved the field of molecular epidemiology but also revolutionized our deep understanding of the M. tuberculosis complex evolutionary history. The intricate paths of the pathogen and its human host are reflected by a common geographical origin in Africa and strong biogeographical associations that largely reflect the past migration waves out of Africa...
August 2016: Microbiology Spectrum
https://www.readbyqxmd.com/read/27681182/evolutionary-history-and-ongoing-transmission-of-phylogenetic-sublineages-of-mycobacterium-tuberculosis-beijing-genotype-in-china
#17
Qing-Qin Yin, Hai-Can Liu, Wei-Wei Jiao, Qin-Jing Li, Rui Han, Jian-Ling Tian, Zhi-Guang Liu, Xiu-Qin Zhao, Ying-Jia Li, Kang-Lin Wan, A-Dong Shen, Igor Mokrousov
Mycobacterium tuberculosis Beijing genotype originated in China and has undergone a dramatic population growth and global spread in the last century. Here, a collection of M. tuberculosis Beijing family isolates from different provinces across all China was genotyped by high-resolution (24-MIRU-VNTR) and low-resolution, high-rank (modern and ancient sublineages) markers. The molecular profiles and global and local phylogenies were compared to the strain phenotype and patient data. The phylogeographic patterns observed in the studied collection demonstrate that large-scale (but not middle/small-scale) distance remains one of the decisive factors of the genetic divergence of M...
September 29, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27671062/association-between-embb-codon-306-mutations-phenotypic-resistance-profiles-and-genotypic-characterization-in-clinical-mycobacterium-tuberculosis-isolates-from-hebei-china
#18
Yanan Li, Yuling Wang, Zhi Zhang, Huixia Gao, Haibin Wang, Jinfeng Cao, Shumin Zhang, Yuzhen Liu, Jianhua Lu, Zungui Xu, Erhei Dai
Ethambutol (EMB) is an essential first-line drug for tuberculosis (TB) treatment. Nucleotide substitutions at embB codon 306 (embB306) have been proposed to be a potential marker for EMB resistance and a predictor of broad drug resistance in clinical Mycobacterium tuberculosis isolates. However, discordant findings about the association between embB306 mutations and EMB resistance were reported. Hebei Province is located in the Beijing-Tianjin-Hebei integration region in China; however, little information about the genetic diversity of the embB locus in this area is available...
December 2016: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/27576137/parallel-reaction-monitoring-of-clinical-mycobacterium-tuberculosis-lineages-reveals-pre-existent-markers-of-rifampicin-tolerance-in-the-emerging-beijing-lineage
#19
Jeroen de Keijzer, Arnout Mulder, Arnoud H de Ru, Dick van Soolingen, Peter A van Veelen
: The spread of multidrug resistant Mycobacterium tuberculosis is one of the major challenges in tuberculosis control. In Eurasia, the spread of multidrug resistant tuberculosis is driven by the M. tuberculosis Beijing genotype. In this study, we examined whether selective advantages are present in the proteome of Beijing isolates that contribute to the emergence of this genotype. To this end, we compared the proteome of M. tuberculosis Beijing to that of M. tuberculosis H37Rv, both in the presence and absence of the first-line antibiotic rifampicin...
August 26, 2016: Journal of Proteomics
https://www.readbyqxmd.com/read/27553413/a-snapshot-of-the-predominant-single-nucleotide-polymorphism-cluster-groups-of-mycobacterium-tuberculosis-clinical-isolates-in-delhi-india
#20
Mandira Varma-Basil, Anshika Narang, Soumitesh Chakravorty, Kushal Garima, Shraddha Gupta, Naresh Kumar Sharma, Astha Giri, Thierry Zozio, David Couvin, Mahmud Hanif, Anuj Bhatnagar, Balakrishnan Menon, Stefan Niemann, Nalin Rastogi, David Alland, Mridula Bose
Several attempts have been made to associate phylogenetic differences among Mycobacterium tuberculosis strains to variations in the clinical outcome of the disease and to drug resistance. We genotyped 139 clinical isolates of M. tuberculosis obtained from patients of pulmonary tuberculosis in North Delhi region. The isolates were analyzed using nine Single nucleotide polymorphism (SNP) markers, spoligotyping and MIRU-VNTRs; and the results were correlated with their drug susceptibility profile. Results of SNP cluster group (SCG) analysis (available for 138 isolates) showed that the most predominant cluster was SCG 3a, observed in 58...
September 2016: Tuberculosis
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