Read by QxMD icon Read

(Mycobacterium AND Tuberculosis)

Ji-Li Zhao, Wei Liu, Wan-Ying Xie, Xu-Dong Cao, Li Yuan
Background: Tuberculosis (TB) caused by Mycobacterium tuberculosis (MTB) is one of the most common chronic infectious amphixenotic diseases worldwide. Prevention and control of TB are greatly difficult, due to the increase in drug-resistant TB, particularly multidrug-resistant TB. We speculated that there were some differences between drug-sensitive and drug-resistant MTB strains and that mazEF 3,6,9 toxin-antitoxin systems (TASs) were involved in MTB viability. This study aimed to investigate differences in viability, biofilm formation, and MazEF expression between drug-sensitive and drug-resistant MTB strains circulating in Xinjiang, China, and whether mazEF 3,6,9 TASs contribute to MTB viability under stress conditions...
2018: Infection and Drug Resistance
Guisheng Xu, Xuhua Mao, Jianming Wang, Hongqiu Pan
Purpose: The objectives of the present study were to characterize the clinical isolates prevailing in the northeast of Jiangsu and to investigate the mode of transmission. The study also aimed to explore the extent to which Mycobacterium tuberculosis strains contributed to drug resistance and the possible factors related to the recent transmission. Patients and methods: We consecutively enrolled 912 culture-confirmed pulmonary tuberculosis (TB) cases from 1 January 2013 to 31 December 2014 in Lianyungang City, which is located in the center of China's vast ocean area and the northeast of Jiangsu province...
2018: Infection and Drug Resistance
Wenwen Pang, Pengcheng Shang, Qingfeng Li, Jiao Xu, Lei Bi, Jing Zhong, Xiaofang Pei
Opportunistic infections (OIs) are the most significant complication of human immunodeficiency virus (HIV) infection. The prevalence of OIs differs among various countries in part due to different climates and socio-economic conditions. We, therefore, carried out the retrospective study at the Public Health Clinical Center of Chengdu, Sichuan to comprehensively investigate the prevalence of OIs, predictors of OIs, and risk factors for in-hospital death among HIV-infected patients. Sichuan in West China is characterized by the largest population living with HIV/Acquired immunodeficiency syndrome (AIDS) across China...
2018: Tohoku Journal of Experimental Medicine
Sergio Arregui, María José Iglesias, Sofía Samper, Dessislava Marinova, Carlos Martin, Joaquín Sanz, Yamir Moreno
In the case of tuberculosis (TB), the capabilities of epidemic models to produce quantitatively robust forecasts are limited by multiple hindrances. Among these, understanding the complex relationship between disease epidemiology and populations' age structure has been highlighted as one of the most relevant. TB dynamics depends on age in multiple ways, some of which are traditionally simplified in the literature. That is the case of the heterogeneities in contact intensity among different age strata that are common to all airborne diseases, but still typically neglected in the TB case...
March 21, 2018: Proceedings of the National Academy of Sciences of the United States of America
L T Daum, O S Konstantynovska, O S Solodiankin, O O Liashenko, P I Poteiko, V I Bolotin, I I Hrek, A V Rohozhyn, J D Rodriguez, G W Fischer, J P Chambers, A P Gerilovych
The Ukraine ranks among the top twenty countries with the highest number of multi-drug resistant (MDR), and extensively drug resistant (XDR) Mycobacterium tuberculosis (MTB) cases in the world. However, little is known of the genetic diversity, i.e., resistance signatures in clinical isolates from this region. We analyzed seven of most prevalent MDR/XDR antibiotic resistance conferring genes from clinical isolates ( N = 75 ) collected from geographically diverse Ukrainian oblasts and its southern Crimean peninsula...
March 21, 2018: Journal of Clinical Microbiology
Eleanor S Click, Gregory S Ouma, Kyle DeGruy, Wilfred Murithi, Julie A Okonji, Kimberly D McCarthy, Susan Musau, Albert Okumu, Heather Alexander, James Posey, Kevin P Cain
No abstract text is available yet for this article.
April 1, 2018: International Journal of Tuberculosis and Lung Disease
R Yadav, A Saini, P Kaur, D Behera, S Sethi
SETTING: A tertiary care hospital in North India. OBJECTIVE: To evaluate the GenoType® MTBDRsl VER 2.0 assay for rapid diagnosis of second-line drug resistance to Mycobacterium tuberculosis. DESIGN: The MTBDRsl VER 2.0 assay was performed on 431 multidrug-resistant M. tuberculosis clinical isolates and specimens. The results were compared with phenotypic drug susceptibility testing (DST) and DNA sequencing. Molecular characterisation of drug resistance using DNA sequencing was performed for gyrA, gyrB, rrs and eis...
April 1, 2018: International Journal of Tuberculosis and Lung Disease
Tulshidas S Patil, Ashwini S Deshpande, Shirish Deshpande, Pravin Shende
Tuberculosis (TB) is a disease caused by the pathogen Mycobacterium tuberculosis. Prolonged administration of high dose antibiotics using oral and injectable routes and their associated side effects, show limitations to successful treatment outcome of TB. Nanocarrier-based dry powder inhalers (DPIs) may provide a breakthrough as an alternative therapeutic approach because of their stable, non-invasive nature and ability to target the drug at the site of infection. The current review focuses on the roadmap of the respiratory system, drug deposition and targeting at the site of infection via pulmonary route...
March 21, 2018: Journal of Drug Targeting
Ting Xin, Xintao Gao, Hongjun Yang, Pingjun Li, Qianqian Liang, Shaohua Hou, Xiukun Sui, Xiaoyu Guo, Weifeng Yuan, Hongfei Zhu, Jiabo Ding, Hong Jia
Bovine tuberculosis (bTB) is primarily caused by infection with Mycobacterium bovis , which belongs to the Mycobacterium tuberculosis complex. The airborne route is considered the most common for transmission of M. bovis , and more than 15% of cattle with bTB shed the Mycobacterium , which can be detect by nested PCR to amplify mycobacterial mpb 70 from a nasal swab from a cow. To screen for cytokines fostering early and accurate detection of bTB, peripheral blood mononuclear cells were isolated from naturally M...
2018: Frontiers in Veterinary Science
Kelechukwu U Okoro, Maria Gomez De La Espriella, Douglas J Grider, Anthony W Baffoe-Bonnie
Mycobacterium tuberculosis has a wide variety of presentations. A rare occurrence is gastrointestinal tuberculosis. It may occur anywhere along the alimentary canal but usually occurs in the ileocecum with rare involvement of the appendix.
2018: Case Reports in Medicine
Martine J Kallemeijn, François G Kavelaars, Michèle Y van der Klift, Ingrid L M Wolvers-Tettero, Peter J M Valk, Jacques J M van Dongen, Anton W Langerak
Immunological aging remodels the immune system at several levels. This has been documented in particular for the T-cell receptor (TCR)αβ+ T-cell compartment, showing reduced naive T-cell outputs and an accumulation of terminally differentiated clonally expanding effector T-cells, leading to increased proneness to autoimmunity and cancer development at older age. Even though TCRαβ+ and TCRγδ+ T-cells follow similar paths of development involving V(D)J-recombination of TCR genes in the thymus, TCRγδ+ T-cells tend to be more subjected to peripheral rather than central selection...
2018: Frontiers in Immunology
Kiatichai Faksri, Eryu Xia, Rick Twee-Hee Ong, Jun Hao Tan, Ditthawat Nonghanphithak, Nampueng Makhao, Nongnard Thamnongdee, Arirat Thanormchat, Arisa Phurattanakornkul, Somcharn Rattanarangsee, Chate Ratanajaraya, Prapat Suriyaphol, Therdsak Prammananan, Yik-Ying Teo, Angkana Chaiprasert
Tuberculous meningitis (TBM) is a severe form of tuberculosis with a high mortality rate. The factors associated with TBM pathogenesis are still unclear. Using comparative whole-genome sequence analysis we compared Mycobacterium tuberculosis (Mtb) isolates from cerebrospinal fluid of TBM cases (n = 73) with those from sputum of pulmonary tuberculosis (PulTB) patients (n = 220) from Thailand. The aim of this study was to seek genetic variants of Mtb associated with TBM. Regardless of Mtb lineage, we found 242 variants that were common to all TBM isolates...
March 20, 2018: Scientific Reports
Hua Yang, Wei Sha, Zhonghua Liu, Tianqi Tang, Haipeng Liu, Lianhua Qin, Zhenling Cui, Jianxia Chen, Feng Liu, Ruijuan Zheng, Xiaochen Huang, Jie Wang, Yonghong Feng, Baoxue Ge
Tuberculosis caused by Mycobacterium tuberculosis (Mtb) infection remains a large global public health problem. One striking characteristic of Mtb is its ability to adapt to hypoxia and trigger the ensuing transition to a dormant state for persistent infection, but how the hypoxia response of Mtb is regulated remains largely unknown. Here we performed a quantitative acetylome analysis to compare the acetylation profile of Mtb under aeration and hypoxia, and showed that 377 acetylation sites in 269 Mtb proteins were significantly changed under hypoxia...
March 21, 2018: Emerging Microbes & Infections
Jeong-Uk Kim, Dae-Shick Ryu, Choong-Hwan Cha, Seon-Hee Park
AIMS: Mycobacterium tuberculosis and non-tuberculous mycobacteria (NTM) are clinically different, and the rapid detection and differentiation of M. tuberculosis complex (MTBC) and NTM is crucial for patient management and infection control. Given the slow growth of most pathogenic mycobacteria, nucleic acid amplification assays are excellent tools for direct identification of mycobacteria in clinical specimens. Recently, a multiplex real-time PCR assay was developed that can directly detect 20 mycobacterial species in clinical specimens...
March 20, 2018: Journal of Clinical Pathology
João Perdigão, Carla Silva, Jaciara Diniz, Catarina Pereira, Diana Machado, Jorge Ramos, Hugo Silva, Fernanda Abilleira, Clarice Brum, Ana J Reis, Maíra Macedo, João L Scaini, Ana B Silva, Leonardo Esteves, Rita Macedo, Fernando Maltez, Sofia Clemente, Elizabeth Coelho, Sofia Viegas, Paulo Rabna, Amabélia Rodrigues, Nuno Taveira, Luísa Jordao, Afrânio Kritski, José Lapa E Silva, Igor Mokrousov, David Couvin, Nalin Rastogi, Isabel Couto, Arnab Pain, Ruth McNerney, Taane G Clark, Andrea von Groll, Elis R Dalla-Costa, Maria Lúcia Rossetti, Pedro E A da Silva, Miguel Viveiros, Isabel Portugal
Tuberculosis (TB) remains a major health problem within the Community of Portuguese Language Speaking Countries (CPLP). Despite the marked variation in TB incidence across its member-states and continued human migratory flux between countries, a considerable gap in the knowledge on the Mycobacterium tuberculosis population structure and strain circulation between the countries still exists. To address this, we have assembled and analysed the largest CPLP M. tuberculosis molecular and drug susceptibility dataset, comprised by a total of 1447 clinical isolates, including 423 multidrug-resistant isolates, from five CPLP countries...
March 17, 2018: Infection, Genetics and Evolution
Benson R Kidenya, Stephen E Mshana, Daniel W Fitzgerald, Oksana Ocheretina
BACKGROUND: Drug resistant Tuberculosis (TB) is considered a global public health threat. Whole-genome sequencing (WGS) is a new technology for tuberculosis (TB) diagnostics and is capable of providing rapid drug resistance profiles and genotypes for epidemiologic surveillance. Therefore, we used WGS to determine genotypic drug resistance profiles and genetic diversity of drug resistant Mycobacterium tuberculosis isolates from Mwanza, North-western Tanzania. METHODS: A cross-sectional study was conducted at the Bugando Medical Center (BMC) from September 2014 to June 2015...
March 2018: Tuberculosis
Himanshu Pandey, Farheen Fatma, Shivraj M Yabaji, Meera Kumari, Sarita Tripathi, Kanchan Srivastava, Dinesh K Tripathi, Surya Kant, Kishore K Srivastava, Ashish Arora
The ESAT-6 family proteins of Mycobacterium tuberculosis are regarded as the key mediators in mycobacterial virulence and are largely considered as antigens that can improve TB vaccines and diagnostics. We have characterized Rv3444c and Rv3445c proteins of the ESX-4 system of ESAT-6 family of M. tuberculosis H37Rv, and have experimentally established that these two proteins interact to form a heterodimeric complex. Complex formation resulted in induction of α-helical conformation and stability against chemical denaturation...
March 2018: Tuberculosis
Natasha Naidoo, Balakrishna Pillay, Martin Bubb, Alexander Pym, Thamsanqa Chiliza, Kogieleum Naidoo, Thumbi Ndung'u, Victoria O Kasprowicz, Manormoney Pillay
Tuberculosis (TB) remains a serious threat in underdeveloped areas. Mycobacterium tuberculosis curli pili (MTP), a virulence factor, is a potential biomarker for a reliable point of care (POC) test and was evaluated for its ability to react with Immunoglobulin G (IgG) in TB patients. An MTP synthetic peptide in a slot blot assay was used to screen serum/plasma samples (n = 65) in 3 separate cohorts, including 40 TB positive (16 HIV co-infected), 20 TB negative/HIV negative patients and 5 healthy volunteers...
March 2018: Tuberculosis
Andrew Fiore-Gartland, Lindsay N Carpp, Kogieleum Naidoo, Ethan Thompson, Daniel E Zak, Steve Self, Gavin Churchyard, Gerhard Walzl, Adam Penn-Nicholson, Thomas J Scriba, Mark Hatherill
Current diagnostic tests for Mycobacterium tuberculosis (MTB) infection have low prognostic specificity for identifying individuals who will develop tuberculosis (TB) disease, making mass preventive therapy strategies targeting all MTB-infected individuals impractical in high-burden TB countries. Here we discuss general considerations for a risk-targeted test-and-treat strategy based on a highly specific transcriptomic biomarker that can identify individuals who are most likely to progress to active TB disease as well as individuals with TB disease who have not yet presented for medical care...
March 2018: Tuberculosis
Rajesh Sinha, Pooja Singh, Neeraj K Saini, Ajit Kumar, Rakesh Pathak, Amita Chandolia, Kushal Garima, Gaurav Tyagi, Madhu Chopra, Ashok Kumar Prasad, Hanumantharao G Raj, Mridula Bose
Cholesterol, an essential cellular component in macrophages, is exploited for entry and long-term survival of Mycobacterium inside the host. Cholesterol-deficient macrophages can restrict the cholesterol-dependent entry of Mycobacterium. Rv3499c protein in Mycobacterium has high binding affinity for cholesterol. Rv3499c gene is a part of mce4 operon which is reported to act as cholesterol transport system in mycobacteria. Earlier we reported Rv3499c protein to localise on cell wall and facilitate entry of Mycobacterium inside macrophages...
March 2018: Tuberculosis
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"