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https://www.readbyqxmd.com/read/27918379/nontuberculous-mycobacteria-in-children-a-focus-on-bloodstream-infections
#1
Laila S Al Yazidi, Ben J Marais, Briony Hazelton, Alexander Outhred, Alison Kesson
BACKGROUND: Nontuberculous mycobacteria (NTM) are ubiquitous organisms with variable disease-causing potential. Bloodstream infections caused by NTM in children are poorly described. METHODS: We describe a retrospective case series of children with culture-confirmed mycobacterial disease managed at The Children's Hospital at Westmead from July 2005 - June 2015. RESULTS: Sixty-five patients had 149 positive NTM cultures; 55 (83.0%) episodes in 54 patients were considered clinically significant...
December 1, 2016: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/27915421/the-frequency-and-treatment-of-pneumothorax-associated-with-pulmonary-nontuberculous-mycobacterial-infection
#2
Masaki Ikeda, Koji Takahashi, Teruya Komatsu, Toru Tanaka, Tatsuo Kato, Takuji Fujinaga
OBJECTIVES: Characteristics of pneumothorax associated with nontuberculous mycobacterium (NTM) infection are rarely reported, especially in terms of surgical treatments. Our objectives were to show the tendency and clinical courses of pneumothorax due to NTM and discuss the way of therapy in our hospital. METHODS: We retrospectively analyzed 557 patients with NTM infection over a period of 5 years at the Nagara Medical Center. RESULTS: A total of 12 out of the 557 patients (2...
December 3, 2016: General Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/27911922/nucleic-acid-amplification-testing-and-sequencing-combined-with-acid-fast-staining-in-needle-biopsy-lung-tissues-for-the-diagnosis-of-smear-negative-pulmonary-tuberculosis
#3
Faming Jiang, Weiwei Huang, Ye Wang, Panwen Tian, Xuerong Chen, Zongan Liang
BACKGROUND: Smear-negative pulmonary tuberculosis (PTB) is common and difficult to diagnose. In this study, we investigated the diagnostic value of nucleic acid amplification testing and sequencing combined with acid-fast bacteria (AFB) staining of needle biopsy lung tissues for patients with suspected smear-negative PTB. METHODS: Patients with suspected smear-negative PTB who underwent percutaneous transthoracic needle biopsy between May 1, 2012, and June 30, 2015, were enrolled in this retrospective study...
2016: PloS One
https://www.readbyqxmd.com/read/27911152/non-tuberculous-mycobacterial-bloodstream-infections-in-patients-with-indwelling-vascular-catheters-the-role-of-sickle-cell-anaemia
#4
Babatunde Edun, Ansal Shah, Martin Durkin, Melanie Whitmire, Shanetta Patterson Williams, Helmut Albrecht, Majdi Al-Hasan, Sharon Weissman
INTRODUCTION: Few studies have examined risk factors for nontuberculous mycobacteria (NTM) bloodstream infections (BSI) involving indwelling vascular catheters (IDVC). Sickle cell anaemia (HbSS/SC) is known to affect several aspects of the immune system leading to relative immune deficiency. The purpose of this retrospective nested case-control study was to determine if HbSS/SC is a risk factor for NTM BSI among individuals with IDVCs. METHODS: All NTM IDVC infections (cases) at two tertiary hospitals from 2008 to 2014 were reviewed...
December 2, 2016: Infectious Diseases
https://www.readbyqxmd.com/read/27904603/prevalence-of-nontuberculous-mycobacteria-isolated-from-environmental-samples-in-iran-a-meta-analysis
#5
REVIEW
Azad Khaledi, Abbas Bahador, Davood Esmaeili, Alireza Tafazoli, Kiarash Ghazvini, Davood Mansury
BACKGROUND: While the most nontuberculous mycobacteria (NTMs) species are considered as opportunistic pathogens, some of them are related to several human infections. It is believed that environment is the main source for these infections. Distribution and scattering pattern of NTMs has not been well studied in Iran and a few studies about this subject have been done, so the aim of this study was to determine prevalence of NTMs in environmental samples from Iran. MATERIALS AND METHODS: Data about prevalence of NTMs in environmental samples from Iran were obtained by searching databases...
2016: Journal of Research in Medical Sciences: the Official Journal of Isfahan University of Medical Sciences
https://www.readbyqxmd.com/read/27902393/frequency-of-mycobacterium-chimaera-among-belgian-patients-2015
#6
Karine Soetaert, Christelle Vluggen, Emmanuel André, Raymond Vanhoof, Brigitte Vanfleteren, Vanessa Mathys
Mycobacterium chimaera arouses an increasing public health concern, as this non-tuberculous mycobacterium (NTM) has recently been associated with life-threatening cardiac infections. M. chimaera and Mycobacteriumintracellulare are genetically very close but recently appeared to present different epidemiological and clinical significance. Therefore, it has become important for laboratories to use adequate techniques allowing precise species identification. To date, most commercially available laboratory assays cannot distinguish them and erroneously identify M...
November 2016: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/27902391/comparative-evaluation-of-the-advansure-mycobacteria-genoblot-assay-and-the-genotype-mycobacterium-cm-as-assay-for-the-identification-of-nontuberculous-mycobacteria
#7
Mina Yang, Hee Jae Huh, Hyeon Jeong Kwon, Ji-Youn Kim, Dong Joon Song, Won-Jung Koh, Chang-Seok Ki, Nam Yong Lee
In this study, to assess the performance of the AdvanSure Mycobacteria GenoBlot Assay (AdvanSure assay), we compared its performance with that of the GenoType Mycobacterium CM/AS assay (GenoType assay) for the identification of nontuberculous mycobacteria (NTM). Twenty-four reference strains and 103 consecutive clinical NTM isolates were analyzed. The accuracy rates for the 24 reference strains were 87.5% and 95.8% for the AdvanSure and GenoType assays respectively. For the 103 clinical isolates, a 91.3% (94/103) concordance rate was observed between the two assays...
October 24, 2016: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/27887611/the-performance-of-interferon-gamma-release-assay-in-nontuberculous-mycobacterial-diseases-a-retrospective-study-in-china
#8
Mao-Shui Wang, Jun-Li Wang, Xin-Feng Wang
BACKGROUND: The interferon-gamma release assay (IGRA) is more specific than the tuberculin skin test to discriminate between tuberculosis (TB) and nontuberculous mycobacterial (NTM) diseases. Here we performed a retrospective study to evaluate the performance of the T-SPOT.TB in patients with NTM diseases. METHODS: Between March, 2013 and Nov, 2015, a total of 58 patients with NTM diseases had a T-SPOT.TB performed were enrolled, 30 patients had definite NTM diseases, 28 had probable diseases...
November 25, 2016: BMC Pulmonary Medicine
https://www.readbyqxmd.com/read/27882322/identification-of-species-of-nontuberculous-mycobacteria-clinical-isolates-from-8-provinces-of-china
#9
Haican Liu, Lulu Lian, Yi Jiang, Mingxiang Huang, Yunhong Tan, Xiuqin Zhao, Jingrui Zhang, Qin Yu, Jiao Liu, Haiyan Dong, Bing Lu, Yimou Wu, Kanglin Wan
Pulmonary diseases caused by nontuberculous mycobacteria (NTM) are increasing in incidence and prevalence worldwide. In this study, we identified NTM species of the clinical isolates from 8 provinces in China, in order to preliminarily provide some basic scientific data in the different species and distribution of NTM related to pulmonary disease in China. A total of 523 clinical isolates from patients with tuberculosis (TB) diagnosed clinically from 2005 to 2012 were identified to the species using conventional and molecular methods, including multilocus PCR, rpoB and hsp65 PCR-PRA, hsp65, rpoB, and 16S-23S internal transcribed spacer region sequencing...
2016: BioMed Research International
https://www.readbyqxmd.com/read/27872397/pulmonary-mycobacterium-marinum-infection-fish-tank-granuloma-of-the-lung
#10
Prasad Palani Velu, Susan E Fernandes, Ian F Laurenson, Donald D Noble
A 65-year-old man presented with a six-month history of lethargy, weight loss and dry cough. He had a background of mild chronic obstructive pulmonary disease. Chest radiograph showed new right upper lobe cavitary opacification. Sputum cultures were acid-fast bacilli smear positive and yielded Mycobacterium marinum - a non-tuberculous mycobacterium (NTM) often found in aquatic environments and rarely associated with respiratory disease. The suspected source was silent aspiration of contaminated water, likely due to his initiating the siphon of his fish-tank by mouth...
November 2016: Scottish Medical Journal
https://www.readbyqxmd.com/read/27871762/clinical-and-histopathologic-ocular-findings-in-disseminated-mycobacterium-chimaera-infection-after-cardiothoracic-surgery
#11
Sandrine A Zweifel, Daniela Mihic-Probst, Christine A Curcio, Daniel Barthelmes, Andrea Thielken, Peter M Keller, Barbara Hasse, Christian Böni
PURPOSE: To investigate and characterize clinical and histopathologic ocular findings in patients with disseminated infection with Mycobacterium chimaera, a slow-growing nontuberculous mycobacterium (NTM), subsequent to cardiothoracic surgery. DESIGN: Observational case series. PARTICIPANTS: Five white patients (10 eyes). METHODS: Analysis of clinical ocular findings, including visual acuity, slit-lamp biomicroscopy, spectral-domain optical coherence tomography (SD OCT), fundus autofluorescence (FAF), and fluorescein angiography/indocyanine green (ICG) angiography findings, of patients with a disseminated M...
November 18, 2016: Ophthalmology
https://www.readbyqxmd.com/read/27866220/molecular-basis-of-mycobacterial-survival-in-macrophages
#12
REVIEW
Jane Atesoh Awuh, Trude Helen Flo
Macrophages play an essential role in the immune system by ingesting and degrading invading pathogens, initiating an inflammatory response and instructing adaptive immune cells, and resolving inflammation to restore homeostasis. More interesting is the fact that some bacteria have evolved to use macrophages as a natural habitat and tools of spread in the host, e.g., Mycobacterium tuberculosis (Mtb) and some non-tuberculous mycobacteria (NTM). Mtb is considered one of humanity's most successful pathogens and is the causal agent of tuberculosis, while NTMs cause opportunistic infections all of which are of significant public health concern...
November 19, 2016: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/27865234/rapid-detection-of-extensively-drug-resistant-xdr-tb-strains-from-multidrug-resistant-tuberculosis-mdr-tb-cases-isolated-from-smear-negative-pulmonary-samples-in-an-intermediate-reference-laboratory-in-india
#13
Himanshu Vashistha, M Hanif, Sanjeev Saini, Ashwani Khanna, Srashty Sharma, Zeeshan Sidiq, Vasim Ahmed, Manoj Dubey, K K Chopra, Divya Shrivastava
BACKGROUND: Direct sputum smear microscopy is commonly used for diagnosing tuberculosis (TB). The objectives of the study were first, to determine the recovery of Mycobacterium tuberculosis in smear-negative sputum samples through liquid culture (using MGIT 960) and solid culture (using LJ slant) and second, to screen multidrug-resistant isolates through line probe assay and further third, to identify XDR isolates through MGIT second-line DST from these positive MDR cultures in Delhi region...
July 2016: Indian Journal of Tuberculosis
https://www.readbyqxmd.com/read/27854334/characterizing-non-tuberculous-mycobacteria-infection-in-bronchiectasis
#14
Paola Faverio, Anna Stainer, Giulia Bonaiti, Stefano C Zucchetti, Edoardo Simonetta, Giuseppe Lapadula, Almerico Marruchella, Andrea Gori, Francesco Blasi, Luigi Codecasa, Alberto Pesci, James D Chalmers, Michael R Loebinger, Stefano Aliberti
Chronic airway infection is a key aspect of the pathogenesis of bronchiectasis. A growing interest has been raised on non-tuberculous mycobacteria (NTM) infection. We aimed at describing the clinical characteristics, diagnostic process, therapeutic options and outcomes of bronchiectasis patients with pulmonary NTM (pNTM) disease. This was a prospective, observational study enrolling 261 adult bronchiectasis patients during the stable state at the San Gerardo Hospital, Monza, Italy, from 2012 to 2015. Three groups were identified: pNTM disease; chronic P...
November 16, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27847012/prevalence-and-species-spectrum-of-both-pulmonary-and-extrapulmonary-nontuberculous-mycobacteria-isolates-at-a-tertiary-care-center
#15
Jyoti Umrao, Dharamveer Singh, Amreen Zia, Swati Saxena, Surendra Sarsaiya, Shushma Singh, Jahanarah Khatoon, Tapan N Dhole
OBJECTIVE/BACKGROUND: Nontuberculous mycobacteria (NTM) infection associated with pulmonary and extrapulmonary disease has been increasing globally. Despite an increase in incidence rate of NTM infection, its prevalence, species diversity, and circulation pattern in India is largely unknown. This study sought to investigate the overall burden and diversity of NTM among both pulmonary and extrapulmonary clinical isolates from a Northern Indian population. METHODS: The study was conducted in the Department of Microbiology, from January 2013 to December 2015...
September 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/27826888/non-tuberculous-mycobacteria-classification-diagnostics-and-therapy
#16
I Porvaznik, I Solovič, J Mokrý
Non-tuberculous mycobacteria (NTM) are species other than those belonging to the Mycobacterium tuberculosis complex and do not cause leprosy. NTM are generally free-living organisms that are ubiquitous in the environment. There have been more than 140 NTM species identified to-date. They can cause a wide range of infections, with pulmonary infections being the most frequent (65-90 %). There is growing evidence that the incidence of NTM lung diseases and associated hospitalizations are on the rise, mainly in regions with a low prevalence of tuberculosis...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/27817806/factors-which-influence-treatment-initiation-for-pulmonary-non-tuberculous-mycobacterium-infection-in-hiv-negative-patients-a-multicentre-observational-study
#17
Timothy M Rawson, Aula Abbara, Katharina Kranzer, Andrew Ritchie, James Milburn, Tim Brown, David Adeboyeku, Jim Buckley, Robert N Davidson, Matthew Berry, Onn Min Kon, Laurence John
BACKGROUND: Clinical, radiological and microbiological criteria inform diagnosis of pulmonary Non-Tuberculous Mycobacteria (NTM) disease and treatment decisions. This multicentre, review aims to characterise NTM disease meeting ATS/IDSA criteria and define factors associated with initiation of treatment. METHODS: Sputum samples growing NTM from 5 London hospitals between 2010 and 2014 were identified. Data for HIV-negative individuals meeting ATS/IDSA guidelines for pulmonary NTM disease were extracted...
November 2016: Respiratory Medicine
https://www.readbyqxmd.com/read/27808247/clinical-significance-of-nontuberculous-mycobacteria-isolated-from-respiratory-specimens-in-a-chinese-tuberculosis-tertiary-care-center
#18
Hongfei Duan, Xiqin Han, Qingfeng Wang, Jing Wang, Jun Wang, Naihui Chu, Hairong Huang
The clinical relevance of non-tuberculous mycobacteria (NTM) has been reported to be different dramatically by species or by regions, however, no such evaluation has been performed in China.A retrospective study was performed in Beijing Chest Hospital. All the NTM strains isolated from respiratory specimens in the past 5 years, and patients' clinical records (symptoms and radiographic information etc.) were investigated. The clinical relevance was evaluated according to the criteria recommended by the American Thoracic society...
November 3, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27804902/non-tuberculous-mycobacteria-epidemiological-pattern-in-a-reference-laboratory-and-risk-factors-associated-with-pulmonary-disease
#19
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...
November 2, 2016: Epidemiology and Infection
https://www.readbyqxmd.com/read/27782812/real-time-pcr-for-the-rapid-identification-and-drug-susceptibility-of-mycobacteria-present-in-bronchial-washings
#20
Thilini Piushani Keerthirathne, Dhammika Nayoma Magana-Arachchi, Dushantha Madegedara, Suneth Sithumini Sooriyapathirana
BACKGROUND: Mycobacteria have a spectrum of virulence and different susceptibilities to antibiotics. Distinguishing mycobacterial species is vital as patients with non-tuberculous mycobacterial (NTM) infections present clinical features that are similar to those of patients with tuberculosis. Thus, rapid differentiation of Mycobacterium tuberculosis complex from NTM is critical to administer appropriate treatment. Hence the aim of the study was to rapid identification of mycobacterial species present in bronchial washings using multiplex real time Polymerase Chain Reaction (PCR) and to determine the drug susceptibility in identified mycobacterial species...
October 26, 2016: BMC Infectious Diseases
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