keyword
MENU ▼
Read by QxMD icon Read
search

Evolution and tuberculosis

keyword
https://www.readbyqxmd.com/read/28067906/prophage-mediated-defence-against-viral-attack-and-viral-counter-defence
#1
Rebekah M Dedrick, Deborah Jacobs-Sera, Carlos A Guerrero Bustamante, Rebecca A Garlena, Travis N Mavrich, Welkin H Pope, Juan C Cervantes Reyes, Daniel A Russell, Tamarah Adair, Richard Alvey, J Alfred Bonilla, Jerald S Bricker, Bryony R Brown, Deanna Byrnes, Steven G Cresawn, William B Davis, Leon A Dickson, Nicholas P Edgington, Ann M Findley, Urszula Golebiewska, Julianne H Grose, Cory F Hayes, Lee E Hughes, Keith W Hutchison, Sharon Isern, Allison A Johnson, Margaret A Kenna, Karen K Klyczek, Catherine M Mageeney, Scott F Michael, Sally D Molloy, Matthew T Montgomery, James Neitzel, Shallee T Page, Marie C Pizzorno, Marianne K Poxleitner, Claire A Rinehart, Courtney J Robinson, Michael R Rubin, Joseph N Teyim, Edwin Vazquez, Vassie C Ware, Jacqueline Washington, Graham F Hatfull
Temperate phages are common, and prophages are abundant residents of sequenced bacterial genomes. Mycobacteriophages are viruses that infect mycobacterial hosts including Mycobacterium tuberculosis and Mycobacterium smegmatis, encompass substantial genetic diversity and are commonly temperate. Characterization of ten Cluster N temperate mycobacteriophages revealed at least five distinct prophage-expressed viral defence systems that interfere with the infection of lytic and temperate phages that are either closely related (homotypic defence) or unrelated (heterotypic defence) to the prophage...
January 9, 2017: Nature Microbiology
https://www.readbyqxmd.com/read/28062754/mycobacterium-tuberculosis-complex-exhibits-lineage-specific-variations-affecting-protein-ductility-and-epitope-recognition
#2
Inmaculada Yruela, Bruno Contreras-Moreira, Carlos Magalhães, Nuno S Osório, Jesús Gonzalo-Asensio
The advent of whole-genome sequencing has provided an unprecedented detail about the evolution and genetic significance of species-specific variations across the whole Mycobacterium tuberculosis Complex. However, little attention has been focused on understanding the functional roles of these variations in the protein coding sequences. In this work, we compare the coding sequences from 74 sequenced mycobacterial species including M. africanum, M. bovis, M. canettii, M. caprae, M. orygis, and M. tuberculosis Results show that albeit protein variations affect all functional classes, those proteins involved in lipid and intermediary metabolism and respiration have accumulated mutations during evolution...
January 6, 2017: Genome Biology and Evolution
https://www.readbyqxmd.com/read/28053915/frequency-of-mutations-in-rifampicin-and-isoniazid-resistant-isolates-of-m-tuberculosis-an-analysis-from-central-india
#3
Prabha Desikan, Atul Kharate, Nikita Panwalkar, Jyoti Khurana, Shaina Beg Mirza, Aparna Chaturvedi, Reeta Varathe, Manju Chourey, Pradeep Kumar, Nitin Doshi, Manoj Pandey
BACKGROUND: The spread of drug-resistant tuberculosis has challenged tuberculosis control strategies globally. The present study aims to analyze the frequency of mutations in rpoB, katG and inhA genes in strains of M. tuberculosis complex (MTBC) circulating in Central India. It is anticipated that the findings may provide a starting point to understand the evolutionary success of drug-resistant strains of MTBC in this region. METHODS: Line probe assay was carried out on 720 consecutive sputum samples of MDR suspects from June 2012 to May 2013...
December 2016: Germs
https://www.readbyqxmd.com/read/28043788/comparison-of-bacteriological-conversion-and-treatment-outcomes-among-mdr-tb-patients-with-and-without-diabetes-in-mexico-preliminary-data
#4
M Muñoz-Torrico, J Caminero Luna, G B Migliori, L D'Ambrosio, J L Carrillo-Alduenda, H Villareal-Velarde, A Torres-Cruz, H Flores-Ergara, D Martínez-Mendoza, C García-Sancho, R Centis, M Á Salazar-Lezama, R Pérez-Padilla
: Diabetes mellitus (DM) is a well-known risk factor for tuberculosis (TB). However, it is not known to what extent DM affects the outcome in patients with multidrug-resistant (MDR-TB) and extensively drug-resistant TB (XDR-TB) treated with second-line anti-TB drugs. The objective of this study was to compare the microbiological evolution (sputum smear and culture conversion) and final outcomes of MDR/XDR-TB patients with and without DM, managed at the national TB reference centre in Mexico City...
December 30, 2016: Revista Portuguesa de Pneumologia
https://www.readbyqxmd.com/read/28043592/next-generation-sequencing-based-user-friendly-platforms-for-drug-resistant-tuberculosis-diagnosis-a-promise-for-the-near-future
#5
David L Dolinger, Rebecca E Colman, David M Engelthaler, Timothy C Rodwell
Since 2002, there has been a gradual worldwide 1.3% annual decrease in the incidence of tuberculosis (TB). This is an encouraging statistic; however, it will not achieve the World Health Organization's goal of eliminating TB by 2050, and it is being compounded by the persistent global incidence of drug-resistant tuberculosis (DR-TB) acquired by transmission and by treatment pressure. One key to effectively control tuberculosis and the spread of multiresistant strains is accurate information pertaining to drug resistance and susceptibility...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28043547/restriction-fragment-length-polymorphism-pattern-of-mycobacterium-isolates-from-rodents-in-infected-cattle-farms
#6
Khatereh Alizadeh, Nader Mosavari, Razieh Nazari
OBJECTIVE/BACKGROUND: Mycobacterium tuberculosis, the etiologic agent of tuberculosis, causes large-scale morbidity and mortality, particularly in developing countries. In recent years, there has been a significant increase in the drug-resistant ability of M. tuberculosis, triggering a major public health crisis. A detailed analysis of the evolution of the mycobacterial genome helps to better understand the genotype-phenotype relationship in this bacterium. Different strain typing methods have already revealed the worldwide diversity of mycobacterial isolates...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28043520/molecular-characterization-of-mycobacterium-tuberculosis-strains-resistant-to-isoniazid
#7
Salma Smaoui, Mariem Siala, Sondes Hadj Fredj, Sana Kammoun, Chema Marouane, Salma Hachicha, Asma Ghorbel, Radhouane Gdoura, Leila Slim, Taieb Ben Messaoud, Férièle Messadi
OBJECTIVE/BACKGROUND: Tuberculosis is a major public health problem and the emergence of drug resistance complicates the situation even more. It is therefore crucial to implement all conclusions from the studies that aim at a better understanding of the molecular mechanisms which govern the emergence and the evolution of drug resistance. The aim of this study is to assess the degree of involvement of the inhA and katG genes in the acquisition of isoniazid resistance in clinical strains of Mycobacterium tuberculosis...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28043498/multidrug-resistant-tuberculosis-in-ethiopian-settings-and-its-association-with-previous-antituberculosis-treatment-a-systematic-review-and-meta-analysis
#8
Setegn Eshetie, Feleke Moges, Mulat Dagnew
OBJECTIVES/BACKGROUND: Efforts to control the global burden of tuberculosis (TB) epidemic have now been jeopardized by the rapid evolution of drug-resistant Mycobacterium tuberculosis (MTB), which are resistant to one or more anti-TB drugs. Multidrug resistant (MDR) TB in Ethiopia may be more prevalent than previously appreciated; thus, up-to-date national drug resistance studies are critically needed. Therefore, this meta-analysis aimed, first, to determine pooled prevalence of MDR TB among newly diagnosed and previously treated TB cases, and second, to measure the association between previous anti-TB exposure and acquisition of MDR-MTB infection...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28007659/retrospective-study-of-clinical-and-lesion-characteristics-of-patients-undergoing-surgical-treatment-for-pulmonary-tuberculosis-in-georgia
#9
REVIEW
Sergo Vashakidze, Albert Despuig, Shota Gogishvili, Keti Nikolaishvili, Natalia Shubladze, Zaza Avaliani, Nestan Tukvadze, Martí Casals, Joan A Caylà, Pere-Joan Cardona, Cristina Vilaplana
OBJECTIVES: Our aim was to retrospectively compare clinical data and characteristics of removed lesions of the cohort of patients undergoing therapeutical surgery for their tuberculosis. DESIGN AND METHODS: Demographic and epidemiological details, clinical data, data on the surgery performed, macroscopic characteristics of the TB lesions removed, and outcome were recorded retrospectively from the 137 patients who underwent therapeutical surgery for their TB in Tbilisi, Georgia during 2014 and 2015...
December 19, 2016: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/28005986/a-systematic-review-of-cost-effectiveness-studies-reporting-cost-per-daly-averted
#10
Peter J Neumann, Teja Thorat, Yue Zhong, Jordan Anderson, Megan Farquhar, Mark Salem, Eileen Sandberg, Cayla J Saret, Colby Wilkinson, Joshua T Cohen
INTRODUCTION: Calculating the cost per disability-adjusted life years (DALYs) averted associated with interventions is an increasing popular means of assessing the cost-effectiveness of strategies to improve population health. However, there has been no systematic attempt to characterize the literature and its evolution. METHODS: We conducted a systematic review of cost-effectiveness studies reporting cost-per-DALY averted from 2000 through 2015. We developed the Global Health Cost-Effectiveness Analysis (GHCEA) Registry, a repository of English-language cost-per-DALY averted studies indexed in PubMed...
2016: PloS One
https://www.readbyqxmd.com/read/27998327/entangled-histories-german-veterinary-medicine-c-1770-1900
#11
Tatsuya Mitsuda
Medical historians have recently become interested in the veterinary past, investigating the development of animal health in countries such as France, the Netherlands, the United Kingdom and the United States. An appreciation of the German context, however, is still lacking - a gap in the knowledge that the present article seeks to fill. Providing a critical interpretation of the evolution of the veterinary profession, this investigation explains why veterinary and medical spheres intersected, drifted apart, then came back together; it also accounts for the stark differences in the position of veterinarians in Germany and Britain...
January 2017: Medical History
https://www.readbyqxmd.com/read/27997216/transmissible-mycobacterium-tuberculosis-strains-share-genetic-markers-and-immune-phenotypes
#12
Hanna Nebenzahl-Guimaraes, Arjan van Laarhoven, Maha R Farhat, Valerie Acm Koeken, Jornt J Mandemakers, Aldert Zomer, Sacha Aft van Hijum, Mihai G Netea, Megan Murray, Reinout van Crevel, Dick van Soolingen
RATIONALE: Successful transmission of tuberculosis depends on the interplay of human behavior, host immune responses and Mycobacterium tuberculosis virulence factors. Previous studies have focused on identifying host risk factors associated with increased transmission, while the contribution of specific genetic variations in mycobacterial strains themselves are still unknown. OBJECTIVES: To identify mycobacterial genetic markers associated with increased transmissibility, and examine whether these markers lead to altered in vitro immune responses...
December 20, 2016: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/27973588/within-host-evolution-selects-for-a-dominant-genotype-of-mycobacterium-tuberculosis-while-t-cells-increase-pathogen-genetic-diversity
#13
Richard Copin, Xueying Wang, Eddie Louie, Vincent Escuyer, Mireia Coscolla, Sebastien Gagneux, Guy H Palmer, Joel D Ernst
Molecular epidemiological assessments, drug treatment optimization, and development of immunological interventions all depend on understanding pathogen adaptation and genetic variation, which differ for specific pathogens. Mycobacterium tuberculosis is an exceptionally successful human pathogen, yet beyond knowledge that this bacterium has low overall genomic variation but acquires drug resistance mutations, little is known of the factors that drive its population genomic characteristics. Here, we compared the genetic diversity of the bacteria that established infection to the bacterial populations obtained from infected tissues during murine M...
December 2016: PLoS Pathogens
https://www.readbyqxmd.com/read/27959952/experimental-evolution-of-mycobacterium-tuberculosis-in-human-macrophages-results-in-low-frequency-mutations-not-associated-with-selective-advantage
#14
Valentina Guerrini, Selvakumar Subbian, Pierre Santucci, Stéphane Canaan, Maria Laura Gennaro, Gianni Pozzi
Isolates of the human pathogen Mycobacterium tuberculosis recovered from clinical samples exhibit genetic heterogeneity. Such variation may result from the stressful environment encountered by the pathogen inside the macrophage, which is the host cell tubercle bacilli parasitize. To study the evolution of the M. tuberculosis genome during growth inside macrophages, we developed a model of intracellular culture in which bacteria were serially passaged in macrophage-like THP-1 cells for about 80 bacterial generations...
2016: PloS One
https://www.readbyqxmd.com/read/27940201/development-of-real-time-immuno-pcr-for-the-quantitative-detection-of-mycobacterial-psts1-in-tuberculosis-patients
#15
Suman Sharma, Ankush Raj, Netrapal Singh, Bhawna Dahiya, Abhishek Sheoran, Krishna B Gupta, Promod K Mehta
A novel indirect real-time immuno-polymerase chain reaction (RT-I-PCR) assay, an evolution of I-PCR, was developed for the quantitative detection of Mycobacterium tuberculosis PstS1 (Rv0934) with a wide dynamic range of 10ng/mL to 1pg/mL in body fluids of tuberculosis (TB) patients, which may monitor the dynamics of disease.
January 2017: Journal of Microbiological Methods
https://www.readbyqxmd.com/read/27931682/fluoroquinolone-consumption-and-resistance-trends-in-mycobacterium-tuberculosis-and-other-respiratory-pathogens-ecological-antibiotic-pressure-and-consequences-in-pakistan-2009-2015
#16
S Shakoor, S Tahseen, K Jabeen, R Fatima, F R Malik, A H Rizvi, R Hasan
OBJECTIVE/BACKGROUND: Fluoroquinolones (FQs) are important anti-tuberculous drugs for the treatment of multidrug-resistant (MDR) tuberculosis. Resistance to FQs leads to fewer options for treatment of tuberculosis (TB), and infection with such strains may also require longer treatment duration. Trends of resistance in Mycobacterium tuberculosis (MTB) are indicators of MTB-resistance evolution. Drivers of such resistance need to be understood and studied to inform preventive strategies...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/27903602/whole-genome-sequencing-of-mycobacterium-tuberculosis-provides-insight-into-the-evolution-and-genetic-composition-of-drug-resistant-tuberculosis-in-belarus
#17
Kurt R Wollenberg, Christopher A Desjardins, Aksana Zalutskaya, Vervara Slodovnikova, Andrew J Oler, Mariam Quiñones, Thomas Abeel, Sinead B Chapman, Michael Tartakovsky, Andrei Gabrielian, Sven Hoffner, Aliaksandr Skrahin, Bruce W Birren, Alexander Rosenthal, Alena Skrahina, Ashlee M Earl
The emergence and spread of drug resistant Mycobacterium tuberculosis (DR-TB) is a critical global health issue. Eastern Europe has some of the highest incidences of DR-TB, particularly multidrug-resistant (MDR) and extensively drug-resistant (XDR) TB. To better understand the genetic composition and evolution of MDR- and XDR-TB in the region, we sequenced and analyzed the genomes of 138 M. tuberculosis isolates from 97 patients sampled between 2010 and 2013 in Minsk, Belarus. MDR and XDR-TB isolates were significantly more likely to belong to the Beijing lineage than to the Euro-American lineage, and known resistance-conferring loci accounted for the majority of phenotypic resistance to first- and second-line drugs in MDR and XDR-TB...
November 30, 2016: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/27881678/evolutionary-adaptation-of-the-essential-trna-methyltransferase-trmd-to-the-signaling-molecule-3-5-camp-in-bacteria
#18
Yong Zhang, Rym Agrebi, Lauren E Bellows, Jean-François Collet, Volkhard Kaever, Angelika Gründling
The nucleotide signaling molecule 3',5'-cyclic adenosine monophosphate (3',5'-cAMP) plays important physiological roles, ranging from carbon catabolite repression in bacteria to mediating the action of hormones in higher eukaryotes, including human. However, it remains unclear whether 3',5'-cAMP is universally present in the Firmicutes group of bacteria. We hypothesized that searching for proteins that bind 3',5'-cAMP might provide new insight into this question. Accordingly, we performed a genome-wide screen and identified the essential Staphylococcus aureus tRNA m(1)G37 methyltransferase enzyme TrmD, which is conserved in all three domains of life as a tight 3',5'-cAMP-binding protein...
January 6, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/27878212/obesity-paradox-obesity-orthodox-and-the-metabolic-syndrome-an-approach-to-unity
#19
Jesse Roth, Navneet Sahota, Priya Patel, Syed Faizan Mehdi, Mohammad Masum Wiese, Hafiz B Mahboob, Michelle Bravo, Daniel J Eden, Muhammad A Bashir, Amrat Kumar, Farah Alsaati, Irwin J Kurland, Wunnie Brima, Ann Danoff, Alessandra L Szulc, Valentin A Pavlov, Kevin J Tracey, Huan Yang
Obesity and the accompanying metabolic syndrome are strongly associated with heightened morbidity and mortality in older adults. In our review of more than 20 epidemiologic studies of major infectious diseases, including leaders such as tuberculosis, community-acquired pneumonia, and sepsis, obesity was associated with better outcomes. A cause-and-effect relationship between over-nutrition and survival with infection is suggested by results of two preliminary studies of infections in mice, where high fat feeding for 8-10 weeks provided much better outcomes...
November 16, 2016: Molecular Medicine
https://www.readbyqxmd.com/read/27872285/armed-conflict-and-population-displacement-as-drivers-of-the-evolution-and-dispersal-of-mycobacterium-tuberculosis
#20
Vegard Eldholm, John H-O Pettersson, Ola B Brynildsrud, Andrew Kitchen, Erik Michael Rasmussen, Troels Lillebaek, Janne O Rønning, Valeriu Crudu, Anne Torunn Mengshoel, Nadia Debech, Kristian Alfsnes, Jon Bohlin, Caitlin S Pepperell, Francois Balloux
The "Beijing" Mycobacterium tuberculosis (Mtb) lineage 2 (L2) is spreading globally and has been associated with accelerated disease progression and increased antibiotic resistance. Here we performed a phylodynamic reconstruction of one of the L2 sublineages, the central Asian clade (CAC), which has recently spread to western Europe. We find that recent historical events have contributed to the evolution and dispersal of the CAC. Our timing estimates indicate that the clade was likely introduced to Afghanistan during the 1979-1989 Soviet-Afghan war and spread further after population displacement in the wake of the American invasion in 2001...
November 29, 2016: Proceedings of the National Academy of Sciences of the United States of America
keyword
keyword
62054
1
2
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"