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https://www.readbyqxmd.com/read/28230286/identification-of-nontuberculous-mycobacteria-using-multilocous-sequence-analysis-of-16s-rrna-hsp65-and-rpob
#1
Si Hyun Kim, Jeong Hwan Shin
BACKGROUND: The isolation of nontuberculous mycobacteria (NTM) from clinical specimens has increased, and they now are considered significant opportunistic pathogens. The aims of this study were to develop a database and interpretive criteria for identifying individual species. In addition, using clinical isolates, we evaluated the clinical usefulness of 16S rRNA, hsp65, and rpoB as target genes for this method. METHODS: The sequences of NTM for 16S rRNA, hsp65, and rpoB were collected from GenBank and checked by manual inspection...
February 23, 2017: Journal of Clinical Laboratory Analysis
https://www.readbyqxmd.com/read/28228494/an-evaluation-of-rgm-medium-for-isolation-of-nontuberculous-mycobacteria-from-respiratory-samples-from-patients-with-cystic-fibrosis-in-the-united-states
#2
Rongpong Plongla, Clair L Preece, John D Perry, Peter H Gilligan
A novel selective agar (RGM medium) has been advocated for the isolation of rapidly growing mycobacteria from the sputum of cystic fibrosis (CF) patients. The aim of this study was to compare RGM medium with Burkholderia cepacia selective agar (BCSA) and a standard AFB culture method for the isolation of nontuberculous mycobacteria (NTM) from patients with CF. The applicability of matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) for identification of NTM isolated on RGM was also assessed...
February 22, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28225347/liquid-culture-enhances-diagnosis-of-patients-with-milder-forms-of-non-tuberculous-mycobacterial-lung-disease
#3
H Lee, J-H Han, H Y Park, K Jeon, H J Huh, C-S Ki, N Y Lee, W-J Koh
OBJECTIVE: To evaluate the proportion and clinical characteristics of patients with non-tuberculous mycobacteria (NTM) lung disease diagnosed based on positive culture results in liquid medium only. METHODS: We reviewed the medical records of 978 patients diagnosed with NTM lung disease. All clinical samples were cultured in both solid and liquid media. RESULTS: Of the 978 patients, 111 (11.3%) were culture-positive in liquid medium only (liquid culture group), and 867 (88...
March 1, 2017: International Journal of Tuberculosis and Lung Disease
https://www.readbyqxmd.com/read/28224727/molecular-identification-and-distribution-of-non-tuberculous-mycobacteria-isolated-from-clinical-specimens-by-pcr-sequencing-method-in-west-of-iran
#4
Mahsa Dastranj, Abbas Farahani, Abdolrazagh Hashemi Shahraki, Sara Atashi, Parviz Mohajeri
BACKGROUND AND AIMS: Infections by Non-tuberculous Mycobacteria (NTM) has rapidly increased in recent years, due to high infection rates related to the populations at risk like immunocompromised individuals, patients predisposed by prior pulmonary. The aim of this study was to investigate the presence of NTM in clinical samples and genetic diversity using 16S rRNA and rpoB sequence analysis. METHODS: A cross-sectional study was conducted on 45 diverse isolates collected from sputum in two years 2014-2015 using standard decontamination procedure...
February 22, 2017: Clinical Respiratory Journal
https://www.readbyqxmd.com/read/28221956/microbiological-quality-and-occurrence-of-nontuberculous-mycobacteria-in-fresh-squeezed-orange-juice-samples-purchased-from-street-vendors-in-mexico-city
#5
Jorge F Cerna-Cortes, Ana Laura Cortes-Cueto, Maria Rosalia Cano-Gaona, Nancy Leon-Montes, Addy C Helguera-Repetto, Sandra Rivera-Gutierrez, Laura P Salas-Rangel, Javier Castro-Rosas, Jorge A Gonzalez-Y-Merchand
Nontuberculous mycobacteria (NTM) are potentially pathogenic agents commonly found in a natural ecosystem. For this reason, food is considered another source of NTM transmission for humans. The aims of this study were to evaluate the microbiological quality and the occurrence of NTM in fresh-squeezed orange juice samples purchased from street vendors. All 102 samples analyzed were positive for aerobic mesophilic bacteria (AMB), with limits ranging from 1.8 to 6.2 log CFU/ml. A total of 55 (54%), 25 (25%), and 13 (13%) orange juice samples were positive for total coliforms (TC), fecal coliforms (FC), and Escherichia coli , respectively...
December 2016: Journal of Food Protection
https://www.readbyqxmd.com/read/28221128/epidemiology-of-nontuberculous-mycobacterial-lung-disease-and-tuberculosis-hawaii-usa
#6
Jennifer Adjemian, Timothy B Frankland, Yihe G Daida, Jennifer R Honda, Kenneth N Olivier, Adrian Zelazny, Stacey Honda, D Rebecca Prevots
Previous studies found Hawaiians and Asian-Americans/Pacific Islanders to be independently at increased risk for nontuberculous mycobacterial pulmonary disease (NTMPD) and tuberculosis (TB). To better understand NTM infection and TB risk patterns in Hawaii, USA, we evaluated data on a cohort of patients in Hawaii for 2005-2013. Period prevalence of NTMPD was highest among Japanese, Chinese, and Vietnamese patients (>300/100,000 persons) and lowest among Native Hawaiians and Other Pacific Islanders (50/100,000)...
March 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28221106/pulmonary-nontuberculous-mycobacteria-associated-deaths-ontario-canada-2001-2013
#7
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/28210208/promoter-specific-expression-and-genomic-structure-of-iglon-family-genes-in-mouse
#8
Taavi Vanaveski, Katyayani Singh, Jane Narvik, Kattri-Liis Eskla, Tanel Visnapuu, Indrek Heinla, Mohan Jayaram, Jürgen Innos, Kersti Lilleväli, Mari-Anne Philips, Eero Vasar
IgLON family is composed of five genes: Lsamp, Ntm, Opcml, Negr1, and Iglon5; encoding for five highly homologous neural adhesion proteins that regulate neurite outgrowth and synapse formation. In the current study we performed in silico analysis revealing that Ntm and Opcml display similar genomic structure as previously reported for Lsamp, characterized by two alternative promotors 1a and 1b. Negr1 and Iglon5 transcripts have uniform 5' region, suggesting single promoter. Iglon5, the recently characterized family member, shares high level of conservation and structural qualities characteristic to IgLON family such as N-terminal signal peptide, three Ig domains, and GPI anchor binding site...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28208653/molecular-characterization-of-mycolactone-producing-mycobacteria-from-aquatic-environments-in-buruli-ulcer-non-endemic-areas-in-c%C3%A3-te-d-ivoire
#9
Marcellin B Tano, Christelle Dassi, Lydia Mosi, Marina Koussémon, Bassirou Bonfoh
Non-tuberculous mycobacteria (NTM), particularly mycolactone producing mycobacteria (MPM), are bacteria found in aquatic environments causing skin diseases in humans like Buruli ulcer (BU). Although the causative agent for BU, Mycobacterium ulcerans has been identified and associated with slow-moving water bodies, the real transmission route is still unknown. This study aimed to characterize MPMs from environmental aquatic samples collected in a BU non-endemic community, Adiopodoumé, in Côte d'Ivoire. Sixty samples were collected in four types of matrices (plant biofilms, water filtrate residues, plant detritus and soils) from three water bodies frequently used by the population...
February 11, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28202251/high-incidence-of-non-tuberculous-mycobacteria-positive-cultures-among-adolescent-with-cystic-fibrosis
#10
Zoé Cavalli, Quitterie Reynaud, Romain Bricca, Raphaële Nove-Josserand, Stéphane Durupt, Philippe Reix, Marie Perceval, Michèle Pérouse de Montclos, Gérard Lina, Isabelle Durieu
BACKGROUND: We evaluated the prevalence of non-tuberculous mycobacteria (NTM)-positive cultures among our cystic fibrosis (CF) center patients, reviewed risk factors for NTM positivity, and determined its impact on lung function evolution. METHODS: From 2009 to 2014, CF adults and children attending the CF center of Lyon (France) and having at least one positive NTM isolate were included. Each case was matched by age and gender with two CF patients with no NTM isolate (controls)...
February 12, 2017: Journal of Cystic Fibrosis: Official Journal of the European Cystic Fibrosis Society
https://www.readbyqxmd.com/read/28194371/non-tuberculous-mycobacteria-in-south-african-wildlife-neglected-pathogens-and-potential-impediments-for-bovine-tuberculosis-diagnosis
#11
Nomakorinte Gcebe, Tiny M Hlokwe
Non-tuberculous mycobacteria (NTM) are not only emerging and opportunistic pathogens of both humans and animals, but from a veterinary point of view some species induce cross-reactive immune responses that hamper the diagnosis of bovine tuberculosis (bTB) in both livestock and wildlife. Little information is available about NTM species circulating in wildlife species of South Africa. In this study, we determined the diversity of NTM isolated from wildlife species from South Africa as well as Botswana. Thirty known NTM species and subspecies, as well as unidentified NTM, and NTM closely related to Mycobacterium goodii/Mycobacterium smegmatis were identified from 102 isolates cultured between the years 1998 and 2010, using a combination of molecular assays viz PCR and sequencing of different Mycobacterial house-keeping genes as well as single nucleotide polymorphism (SNP) analysis...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28174026/susceptibility-to-non-tuberculous-mycobacterial-disease-is-influenced-by-rs1518111-in-il10
#12
Samuel Halstrom, Rachel Thomson, Hayley Goullee, Svetlana Baltic, Richard Allcock, Suzanna E L Temple, Patricia Price
Although exposure to potentially pathogenic nontuberculous mycobacteria (NTM) via soil and domestic water supplies is common, pulmonary infection and disease are confined to a small proportion of older individuals. Previously, alleles of a polymorphism in IL10 (rs1800896) were associated with NTM disease and we demonstrated elevated production of IL-10 by blood leukocytes from patients with pulmonary NTM. Here seven additional polymorphisms in IL10 were investigated in a larger cohort of Caucasian controls and patients with pulmonary NTM disease...
February 4, 2017: Human Immunology
https://www.readbyqxmd.com/read/28157472/the-100-most-cited-articles-on-non-tuberculous-mycobacterial-infection-from-1995-to-2015
#13
B W Jhun, S-Y Kim, J H Kong, J R Park, S Y Park, M A Shim, K Jeon, H Y Park, S J Shin, W-J Koh
SETTING: Citation analyses aid in assessing quality, trends and future directions of research fields. OBJECTIVE: To identify the most influential articles on infections caused by non-tuberculous mycobacteria (NTM) in the last 20 years. DESIGN: We performed a cited reference search of the Web of Science database from 1995 to 2015. The 100 most cited articles on NTM infections were analysed. RESULTS: The top 100 articles were cited 114-1471 times, and were published from 1995 to 2013...
January 1, 2017: International Journal of Tuberculosis and Lung Disease
https://www.readbyqxmd.com/read/28139909/mycobacteria-in-municipal-wastewater-treatment-and-reuse-microbial-diversity-for-screening-the-occurrence-of-clinically-and-environmentally-relevant-species-in-arid-regions
#14
Yamrot M Amha, Muhammad Zohaib Anwar, Rajkumari Kumaraswamy, Andreas Henschel, Farrukh Ahmad
With accumulating evidence of pulmonary infection via aerosolized nontuberculous mycobacteria (NTM), it is important to characterize their persistence in wastewater treatment, especially in arid regions where treated municipal wastewater is extensively reused. To achieve this goal, microbial diversity of the genus Mycobacterium was screened for clinically- and environmentally-relevant species using pyrosequencing. Analysis of the post-disinfected treated wastewater showed presence of clinically-relevant slow-growers like M...
January 31, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28135043/household-proximity-to-water-and-nontuberculous-mycobacteria-in-children-with-cystic-fibrosis
#15
Jennifer M Bouso, James J Burns, Raid Amin, Floyd R Livingston, Okan Elidemir
BACKGROUND: Nontuberculous mycobacteria (NTM) have a particular affinity for patients with cystic fibrosis (CF). Recent studies suggest a possible relationship between acquiring NTM and the level of environmental water in a given area. We sought to determine if there is an association between household proximity to water and NTM in children with CF. MATERIALS AND METHODS: An IRB-approved retrospective chart review was completed on 150 children with CF in Florida...
January 30, 2017: Pediatric Pulmonology
https://www.readbyqxmd.com/read/28131606/antimicrobial-susceptibility-and-mic-distribution-of-41-drugs-against-clinical-isolates-from-china-and-reference-strains-of-nontuberculous-mycobacteria
#16
Guilian Li, Hui Pang, Qian Guo, Mingxiang Huang, Yanhong Tan, Chao Li, Jianhao Wei, Yuanzhi Xia, Yi Jiang, Xiuqin Zhao, Haican Liu, Li-Li Zhao, Zhiguang Liu, Donglei Xu, Kanglin Wan
To treat nontuberculous mycobacteria (NTM) infections more optimally, further research pertaining to mycobacterial susceptibility to antimicrobial agents is required. A total of 82 species of NTM reference strains and 23 species of NTM clinical isolates were included. Minimum inhibitory concentrations (MICs) for 41 drugs were determined using the microdilution method in cation-adjusted Mueller-Hinton broth. The results showed that most of the NTM were susceptible to aminoglycosides, quinolones, three macrolides (clarithromycin, azithromycin and roxithromycin), cefmetazole, linezolid and capreomycin...
December 21, 2016: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/28128073/nontuberculous-mycobacteria-overview
#17
Won-Jung Koh
Nontuberculous mycobacteria (NTM) are emerging pathogens that affect both immunocompromised and immunocompetent patients. The development of molecular methods has allowed the characterization of new species and the identification of NTM to the precise species and subspecies levels. The incidence and prevalence of NTM lung disease are increasing worldwide, and this syndrome accounts for the majority of clinical cases of NTM disease. Common causative organisms of pulmonary infection are the slowly growing mycobacteria Mycobacterium avium complex and Mycobacterium kansasii and the rapidly growing mycobacteria, including Mycobacterium abscessus complex...
January 2017: Microbiology Spectrum
https://www.readbyqxmd.com/read/28127232/computed-tomography-findings-of-pulmonary-mycobacterium-simiae-infection
#18
Ayeh Baghizadeh, Payam Mehrian, Poopak Farnia
Nontuberculous mycobacterial (NTM) pulmonary infections can be quite similar to tuberculosis, both clinically and radiologically. However, the treatment protocol is not similar. Mycobacterium simiae is a rare cause of NTM pulmonary infection. Herein, we aimed to evaluate and compare the computed tomography (CT) scan findings of M. simiae infection in lungs. For this reason, thirty-four patients (n = 34) with M. simiae lung infection were retrospectively evaluated. Diagnosis was confirmed by American Thoracic Society (ATS) guidelines and CT scans were reviewed in both lung and mediastinal windows...
2017: Canadian Respiratory Journal: Journal of the Canadian Thoracic Society
https://www.readbyqxmd.com/read/28126044/rv1458c-a-new-diagnostic-marker-for-identification-of-m-tuberculosis-complex-in-a-novel-duplex-pcr-assay
#19
Kamal Shrivastava, Kushal Garima, Anshika Narang, Kausik Bhattacharyya, Ekta Vishnoi, Roshan Kumar Singh, Anil Choudhary, Rajendra Prasad, Mridula Bose, Mandira Varma-Basil
We explored the efficiency of Rv1458c, a putative ABC drug transporter specific for the Mycobacterium tuberculosis complex (MTBC) as a diagnostic marker. A 190 bp region of Rv1458c and a 300bp region of hsp65 were targeted in a novel duplex PCR assay and compared with PCR restriction analysis (PRA) using restriction enzymes NruI and BamHI. Speciation of a subset of the isolates (n=50) was confirmed by sequencing. Clinical isolates (n=426) obtained from clinically suspected patients of pulmonary tuberculosis; and mycobacterial (n=13) and non-mycobacterial (n=8) reference strains were included in the study...
January 23, 2017: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/28126017/ruptured-aortic-aneurysm-due-to-mycobacterium-bovis-bcg-with-a-delayed-bacteriological-diagnosis-due-to-false-negative-result-of-the-mpb-64-immunochromatographic-assay
#20
J Simar, L Belkhir, B Tombal, E André
BACKGROUND: Adjuvant therapy with bacillus Calmette-Guerin (BCG), a live attenuated strain of Mycobacterium bovis, has become the treatment of choice for low-risk superficial bladder carcinoma following transurethral resection of the bladder. Complications following vesical BCG instillations are uncommon but, in some cases, severe side-effects can occur such as sepsis or mycotic aneurysm. Besides usual laboratory techniques used for the diagnosis of Mycobacterium tuberculosis complex (MTBC) infections (smear microscopy and cultures), commercial immunochromatographic assays detecting MBP64, a 24 kDa M...
January 26, 2017: BMC Research Notes
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