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https://www.readbyqxmd.com/read/28641879/mycobacterium-xenopi-and-squamous-cell-carcinoma-of-the-lung
#1
Miguel Martín Asenjo, Javier Miguel Martín Guerra, María Rosa López Pedreira, José María Prieto de Paula
No abstract text is available yet for this article.
June 19, 2017: Archivos de Bronconeumología
https://www.readbyqxmd.com/read/28545813/design-synthesis-and-evaluation-of-indole-2-carboxamides-with-pan-anti-mycobacterial-activity
#2
Nicholas D Franz, Juan Manuel Belardinelli, Michael A Kaminski, Louis C Dunn, Vinicius Calado Nogueira de Moura, Michael A Blaha, Dan D Truong, Wei Li, Mary Jackson, E Jeffrey North
Current treatment regimens for non-tuberculous mycobacteria (NTM) and tuberculosis (TB) generally require long duration of therapy with multiple drugs, some of which are broad spectrum antibiotics. Despite some advances in antimicrobial compounds, there remains a need in therapy for antibiotics with specific mycobacterial targets. It has been shown that MmpL3 is an essential transporter required for the translocation of mycolic acids to the mycobacterial cell envelope. Here, we synthesized a series of indole-2-carboxamides that inhibit MmpL3 and have potent pan-activity against mycobacterial species...
May 8, 2017: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/28461147/microbiological-and-clinical-outcomes-of-treating-non-mac-ntm-pulmonary-disease-a-systematic-review-and-meta-analysis
#3
R Diel, F C Ringshausen, E Richter, L Welker, J Schmitz, A Nienhaus
BACKGROUND: Pulmonary disease caused by non-tuberculous mycobacteria (NTM) is steadily increasing worldwide. METHODS: A systematic review of Non-Mycobacterium avium complex studies published prior to October 2016 was conducted with respect to microbiological and clinical outcomes of current treatment regimens. RESULTS: We retrieved 352 citations; these yielded 24 studies eligible for evaluation. Sixteen studies were retrospective chart reviews, 3 were prospective and only 5 randomized...
April 28, 2017: Chest
https://www.readbyqxmd.com/read/28424429/the-volatile-molecule-signature-of-four-mycobacteria-species
#4
Theodore Mellors, Christiaan Rees, Wendy Wieland-Alter, C Fordham von Reyn, Jane E Hill
Mycobacteria are the leading cause of death from infectious disease worldwide and limitations in current diagnostics are hampering control efforts. In recent years, the use of small volatile molecules as diagnostic biomarkers for mycobacteria has shown promise for use in the rapid analysis of in vitro cultures as well as ex vivo diagnosis using breath or sputum. In this study, 18 strains from four mycobacteria species (Mycobacterium avium, M. bovis BCG, M. intracellulare and M. xenopi) were analyzed for the first time using two-dimensional gas chromatography time-of-flight mass spectrometry (GC×GC-TOFMS)...
April 20, 2017: Journal of Breath Research
https://www.readbyqxmd.com/read/28394313/structure-of-the-mycobacterial-esx-5-type-vii-secretion-system-membrane-complex-by-single-particle-analysis
#5
Katherine S H Beckham, Luciano Ciccarelli, Catalin M Bunduc, Haydyn D T Mertens, Roy Ummels, Wolfgang Lugmayr, Julia Mayr, Mandy Rettel, Mikhail M Savitski, Dmitri I Svergun, Wilbert Bitter, Matthias Wilmanns, Thomas C Marlovits, Annabel H A Parret, Edith N G Houben
Mycobacteria are characterized by their impermeable outer membrane, which is rich in mycolic acids(1). To transport substrates across this complex cell envelope, mycobacteria rely on type VII (also known as ESX) secretion systems(2). In Mycobacterium tuberculosis, these ESX systems are essential for growth and full virulence and therefore represent an attractive target for anti-tuberculosis drugs(3). However, the molecular details underlying type VII secretion are largely unknown, due to a lack of structural information...
April 10, 2017: Nature Microbiology
https://www.readbyqxmd.com/read/28387523/species-specific-risk-factors-treatment-decisions-and-clinical-outcomes-for-laboratory-isolates-of-less-common-nontuberculous-mycobacteria-in-washington-state
#6
Emily S Ford, David J Horne, Javeed A Shah, Carolyn K Wallis, Ferric C Fang, Thomas R Hawn
RATIONALE: Nontuberculous mycobacteria are a diverse group of environmental organisms that infrequently cause human disease. Understanding the epidemiologic and clinical characteristics associated with nontuberculous mycobacterial disease is needed to refine diagnostic and treatment strategies, particularly among the less commonly isolated species. OBJECTIVES: To improve knowledge of geographic variance of nontuberculous mycobacteria (NTM) species, to correlate detailed clinical information with isolation of specific NTM, and to examine the decision to treat and outcomes for specific NTM...
April 7, 2017: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/28297817/-distribution-and-drug-resistance-of-nontuberculous-mycobacteria-in-beijing
#7
J Zhang, J R Su, B C Ding, J W Liu, J L Yi, X Y Yang, N H Wang, S M Wang
Objective: To analyze the distribution and drug resistance of nontuberculous mycobacteria(NTM) in Beijing. Methods: Using PCR-fluorescence probe method we identified 1 552 mycobacterial isolates in 2009 and 1 553 mycobacterial isolates in 2013, which were stored by Beijing Research Institute for Tuberculosis Control.All identified NTM strains were confirmed by 16S rRNA gene sequencing, and drug sensitivity testing was performed by using 1% ratio method.SPSS 13.0 was used for statistical analysis. Results: The isolation rate for NTM in 2009 and 2013 was 3...
March 12, 2017: Chinese Journal of Tuberculosis and Respiratory Diseases
https://www.readbyqxmd.com/read/28221106/pulmonary-nontuberculous-mycobacteria-associated-deaths-ontario-canada-2001-2013
#8
Theodore K Marras, Michael A Campitelli, Hong Lu, Hannah Chung, Sarah K Brode, Alex Marchand-Austin, Kevin L Winthrop, Andrea S Gershon, Jeffrey C Kwong, Frances B Jamieson
Survival implications of nontuberculous mycobacterial pulmonary disease (NTM-PD) and NTM pulmonary isolation without disease (NTM-PI) are unclear. To study deaths associated with NTM-PD and NTM-PI and differences in survival between them, we conducted a population-based cohort study of persons with microbiologically defined NTM-PD or NTM-PI diagnosed during 2001-2013 in Ontario, Canada. We used propensity score matching and Cox proportional hazards models to compare survival. Among 9,681 NTM-PD patients and 10,936 NTM-PI patients, 87% and 91%, respectively, were successfully matched with unexposed controls...
March 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/27959960/nontuberculous-mycobacterial-infections-in-a-french-hospital-a-12-year-retrospective-study
#9
Peggy Blanc, Hervé Dutronc, Olivia Peuchant, Frédéric-Antoine Dauchy, Charles Cazanave, Didier Neau, Gaëtane Wirth, Jean-Luc Pellegrin, Philippe Morlat, Patrick Mercié, José-Manuel Tunon-de-Lara, Marie-Sylvie Doutre, Philippe Pélissier, Michel Dupon
BACKGROUND: Nontuberculous mycobacteria (NTM) are environmental organisms associated with a range of infections. Reports of NTM epidemiology are mainly focused on pulmonary infections and isolations, and extrapulmonary infections are less frequently described. METHODS: We conducted a retrospective study of NTM infections at the Bordeaux University Hospital, France, between January 2002 and December 2013. We used the microbiologic component of the American Thoracic Society/Infectious Diseases Society of America's pulmonary NTM disease criteria to define cases of pulmonary NTM, and patients with isolates from a normally sterile site were classified as having extrapulmonary disease...
2016: PloS One
https://www.readbyqxmd.com/read/27804902/non-tuberculous-mycobacteria-epidemiological-pattern-in-a-reference-laboratory-and-risk-factors-associated-with-pulmonary-disease
#10
J Mencarini, C Cresci, M T Simonetti, C Truppa, G Camiciottoli, M L Frilli, P G Rogasi, S Veloci, M Pistolesi, G M Rossolini, A Bartoloni, F Bartalesi
The diseases caused by non-tuberculous mycobacteria (NTM), in both AIDS and non-AIDS populations, are increasingly recognized worldwide. Although the American Thoracic Society published the guidelines for diagnosis of NTM pulmonary disease (NTM-PD), the diagnosis is still difficult. In the first part of the study, we collected data on NTM isolates in the Mycobacteriology Laboratory of Careggi Hospital (Florence, Italy) and analysed the epidemiological data of NTM isolates. Then, to analyse the risk factors associated to NTM-PD, we studied the presence of ATS/IDSA criteria for NTM-PD in patients who had at least one positive respiratory sample for NTM and were admitted to the Infectious Disease Unit and the Section of Respiratory Medicine...
February 2017: Epidemiology and Infection
https://www.readbyqxmd.com/read/27551724/comparison-of-maldi-tof-ms-nucleic-acid-hybridization-and-the-mpt64-immunochromatographic-test-for-the-identification-of-m-tuberculosis-and-non-tuberculosis-mycobacterium-species
#11
COMPARATIVE STUDY
Asuman Şamlı, Arzu İlki
Mycobacteria are an important cause of morbidity in humans. Rapid and accurate mycobacterial identification is important for improving patient outcomes. However, identification of Mycobacterium species is not easy, due to the slow and fastidious growth of mycobacteria. Recently, biochemical, sequencing, and probing methods have come to be used for identification. This study compared the performance of matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) for the identification of M...
October 2016: New Microbiologica
https://www.readbyqxmd.com/read/27002256/vertebral-osteomyelitis-caused-by-non-tuberculous-mycobacteria-predisposing-conditions-and-clinical-characteristics-of-six-cases-and-a-review-of-63-cases-in-the-literature
#12
Chung-Jong Kim, Uh-Jin Kim, Hong Bin Kim, Sang Won Park, Myoung-Don Oh, Kyung-Hwa Park, Nam Joong Kim
Background Several case series have reported on clinical and radiographic characteristics of patients with vertebral osteomyelitis (VO) caused by non-tuberculous mycobacteria (NTM). However, only a few patients were included, and systematic reviews are still lacking. The aim of this study was to update and summarise the pre-disposing conditions, clinical and radiographic characteristics of such cases due to NTM. Methods In this study, a systematic review was conducted of the English-language literature from 1961-2014 to investigate the pre-disposing conditions and characteristics of cases of VO due to NTM...
July 2016: Infectious Diseases
https://www.readbyqxmd.com/read/26976549/update-on-pulmonary-disease-due-to-non-tuberculous-mycobacteria
#13
REVIEW
Jason E Stout, Won-Jung Koh, Wing Wai Yew
Non-tuberculous mycobacteria (NTM) are emerging worldwide as significant causes of chronic pulmonary infection, posing a number of challenges for both clinicians and researchers. While a number of studies worldwide have described an increasing prevalence of NTM pulmonary disease over time, population-based data are relatively sparse and subject to ascertainment bias. Furthermore, the disease is geographically heterogeneous. While some species are commonly implicated worldwide (Mycobacterium avium complex, Mycobacterium abscessus), others (e...
April 2016: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/26618171/macrocolonies-granules-formation-as-a-cause-of-false-negative-results-in-the-mgit-960-system-cause-analysis-and-correlation-with-mycobacterial-species
#14
Xia Yu, Liping Zhao, Guanglu Jiang, Yifeng Ma, Weimin Li, Hairong Huang
BACKGROUND: The viable mycobacterial bacilli can sometimes form granules in the Mycobacterium Growth Indicator Tube (MGIT) to produce instrument-negative outcomes when BACTEC MGIT 960 culture is performed. The cause of this phenomenon has never been analyzed. METHODS: Thirty-one instrument-negative, granule presenting MGIT vials were collected for conducting acid-fast staining and also liquid and solid subculture. Species identification and drug susceptibility test were performed with the recovered strains...
2015: BioMed Research International
https://www.readbyqxmd.com/read/26471200/direct-identification-of-mycobacteria-from-liquid-media-using-a-triplex-real-time-pcr-coupled-with-pyrosequencing-method
#15
Jeong-Uk Kim, Choong-Hwan Cha, Seon-Hee Park
Culture in enriched broth, as well as on a solid medium, is recommended for primary isolation of mycobacteria. With the introduction of liquid mycobacterial culture methods, a substantial workload regarding the identification of culture-recovered mycobacterial species, particularly Mycobacterium tuberculosis complex (MTC), has been imposed on our laboratory. We thus developed a triplex, real-time PCR coupled with pyrosequencing assay that can directly identify mycobacterial species from liquid media, which can reduce the workload...
December 2015: Journal of Microbiological Methods
https://www.readbyqxmd.com/read/26418244/osteomyelitis-because-of-mycobacterium-xenopi-in-an-immunocompetent-child
#16
Martin Kuntz, Maximilian Seidl, Philipp Henneke
We present the case of a 6-year-old, immunocompetent boy with chronic osteomyelitis of the calcaneus caused by Mycobacterium xenopi. Of note, typical histopathology was not visible on the first biopsy and developed only later over a period of 6 weeks, highlighting the difficult differential diagnosis of osteomyelitis caused by nontuberculous mycobacteria.
January 2016: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/26381664/engineering-versatile-protein-expression-systems-mediated-by-inteins-in-escherichia-coli
#17
Keith W Y Kwong, Alan K L Ng, W K R Wong
We have recently employed an intein, Saccharomyces cerevisiae vascular membrane ATPase (VMA), in conjunction with efficient expression and secretory functions formed between the ompA leader sequence and the human epidermal growth factor (EGF) gene (fused at the 5' end of VMA), and the human basic fibroblast growth factor (bFGF) gene (fused at the 3' end of VMA), to engineer an efficient intein-based Escherichia coli system for high-level co-expression of EGF and bFGF as authentic mature products. Both products were found not only excreted to the culture medium but also located, surprisingly, in the cytoplasm (Kwong and Wong 2013)...
January 2016: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/26142475/time-kill-kinetics-of-slowly-growing-mycobacteria-common-in-pulmonary-disease
#18
Beatriz E Ferro, Jakko van Ingen, Melanie Wattenberg, Dick van Soolingen, Johan W Mouton
OBJECTIVES: This study aimed to provide basic pharmacodynamic information for key antibiotics used to treat Mycobacterium avium and Mycobacterium xenopi pulmonary disease. METHODS: M. avium subspecies hominissuis IWGMT49 and M. xenopi ATCC 19250 type strains were used; the MICs of clarithromycin, amikacin and moxifloxacin were determined by broth microdilution. Time-kill assays were performed, exposing bacteria to 2-fold concentrations from 0.062× to 32× the MIC at 37°C for 240 h for M...
October 2015: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/25676516/epidemiology-of-human-pulmonary-infection-with-nontuberculous-mycobacteria-a-review
#19
REVIEW
D Rebecca Prevots, Theodore K Marras
Population-based data have documented a worldwide increase in the prevalence of human nontuberculous mycobacterial (NTM) infections since 2000. Mycobacterium avium complex is predominant in North America and East Asia, whereas in regions within Europe, M kansasii, M xenopi, and M malmoense are more common. Host factors important to the current epidemiology of NTM pulmonary disease include thoracic skeletal abnormalities, rheumatoid arthritis, and use of immunomodulatory drugs. Clustering of disease within families suggests a heritable genetic predisposition to disease susceptibility...
March 2015: Clinics in Chest Medicine
https://www.readbyqxmd.com/read/25503362/comparative-analysis-of-the-effectiveness-of-c-terminal-cleavage-intein-based-constructs-in-producing-a-recombinant-analog-of-anophelin-an-anticoagulant-from-anopheles-albimanus
#20
COMPARATIVE STUDY
Roman S Esipov, Maria A Kostromina
Production of small recombinant peptides by expressing them as fusion proteins, with subsequent proteolytic or chemical cleavage of the latter, is a widespread approach in modern biotechnology. An alternative method is to produce such peptides as self-cleaving fusion proteins with inteins. To date, only a small proportion of known inteins have been used for this purpose, and analysis of other inteins for the ability to cleave off the target polypeptide can significantly expand the range of intein-based transgenic constructs available to researchers...
March 2015: Applied Biochemistry and Biotechnology
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