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Nontuberculous mycobacteria

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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/27915300/challenges-in-the-management-of-chronic-pulmonary-aspergillosis
#2
Chris Kosmidis, Eavan G Muldoon
The management of chronic pulmonary aspergillosis (CPA) presents multiple challenges. We present three cases that illustrate some of the most challenging aspects of caring for patients with CPA: specifically, antifungal drug resistance, drug interactions, coinfection with nontuberculous mycobacteria, and large-volume hemoptysis.
December 2, 2016: Medical Mycology: Official Publication of the International Society for Human and Animal Mycology
https://www.readbyqxmd.com/read/27911953/correction-environmental-nontuberculous-mycobacteria-in-the-hawaiian-islands
#3
Jennifer R Honda, Nabeeh A Hasan, Rebecca M Davidson, Myra D Williams, L Elaine Epperson, Paul R Reynolds, Terry Smith, Elena Iakhiaeva, Matthew J Bankowski, Richard J Wallace, Edward D Chan, Joseph O Falkinham, Michael Strong
[This corrects the article DOI: 10.1371/journal.pntd.0005068.].
December 2016: PLoS Neglected Tropical Diseases
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
#4
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
#5
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/27909634/nontuberculous-mycobacteria-lymphadenitis-a-case-report
#6
Amanda M Krantz, Meera Varnam, Cristina Fernandez
Atypical mycobacteria, also known as nontuberculous mycobacteria (NTM) includes acid-fast bacteria other than Mycobacterium tuberculosis. NTM can be isolated from a variety of environmental sources including water, food products, domestic animals, and soil; human exposure is typically from soil to the oral cavity and respiratory tract. Diagnosis of NTM is suspected in children less than five years old with subacute, unilateral, non-tender cervicofacial lymphadenitis in combination with a history of water exposure, penetrating injection, as well as negative routine cultures or response to antistaphylococcal and antistreptococcal antibiotics...
October 25, 2016: Curēus
https://www.readbyqxmd.com/read/27904603/prevalence-of-nontuberculous-mycobacteria-isolated-from-environmental-samples-in-iran-a-meta-analysis
#7
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/27902391/comparative-evaluation-of-the-advansure-mycobacteria-genoblot-assay-and-the-genotype-mycobacterium-cm-as-assay-for-the-identification-of-nontuberculous-mycobacteria
#8
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/27900974/disseminated-mycobacteria-chelonae-infection-in-a-kidney-pancreas-transplant-recipient-a-case-report-and-review-of-the-literature
#9
Shafi Malik, Ananda Ghosh, Shahid Husain
A 40-year-old male with a long-standing history of type 1 diabetes with end-stage renal failure underwent combined kidney-pancreas (KP) transplant from a standard criteria donor. Post-operative course was uncomplicated with good primary function of both transplant grafts. Induction was with thymoglobulin and maintenance immunosuppression was with tacrolimus, mycophenolate mofetil and prednisolone. Nine weeks post-transplant, the patient developed dysfunction of both grafts. Panel reactive antibody testing revealed that the patient had developed a de novo donor-specific antibody and considering an antibody-mediated rejection the patient was treated with intravenous pulse methyl prednisone 500 mg ×3 doses, IV immunoglobulin 2 mg/kg in two divided doses, and ATG 7 mg/kg (total dose of 700 mg)...
November 2016: Saudi Journal of Kidney Diseases and Transplantation
https://www.readbyqxmd.com/read/27890172/opportunistic-infections-in-biological-therapy-risk-and-prevention
#10
REVIEW
Paul A Bryant, John W Baddley
Patients being treated with biological therapies are at increased risk for serious infections, including opportunistic infections. Although more is known about opportunistic infection risk with older biologics, such as antitumor necrosis factor drugs, there is less knowledge of opportunistic infection risk with newer biological therapies. The incidence of certain opportunistic infections (tuberculosis, herpes zoster, pneumocystosis) has been rigorously evaluated in large observational studies. However, data are more limited for other infections (histoplasmosis, nontuberculous mycobacteria)...
February 2017: Rheumatic Diseases Clinics of North America
https://www.readbyqxmd.com/read/27887611/the-performance-of-interferon-gamma-release-assay-in-nontuberculous-mycobacterial-diseases-a-retrospective-study-in-china
#11
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
#12
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/27876856/the-trend-and-the-disease-prediction-of-vascular-endothelial-growth-factor-and-placenta-growth-factor-in-nontuberculous-mycobacterial-lung-disease
#13
Chou-Han Lin, Chin-Chung Shu, Chia-Lin Hsu, Shih-Lung Cheng, Jann-Yuan Wang, Chong-Jen Yu, Li-Na Lee
Nontuberculous mycobacteria (NTM)-lung disease (LD) is an increasing health problem worldwide. The diagnosis of this disease remains difficult, however the application of placenta growth factor (PlGF) and vascular endothelial growth factor (VEGF) has not yet been studied. We screened patients with Mycobacterium avium complex or M. abscessus isolated from sputum, and enrolled 32 patients with NTM-LD and 93 with NTM pulmonary colonization. The NTM-LD group had a lower body mass index, higher proportion of bronchiectasis, more respiratory symptoms and pulmonary lesions, and higher titers of sputum acid-fast stain than the NTM pulmonary colonization group...
November 23, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27868301/exploring-maldi-tof-ms-approach-for-a-rapid-identification-of-mycobacterium-avium-subsp-paratuberculosis-field-isolates
#14
M Ricchi, A Mazzarelli, A Piscini, A Di Caro, A Cannas, S Leo, S Russo, N Arrigoni
AIMS: The aim of the study was to explore the suitability of MALDI-TOF MS for a rapid and correct identification of Mycobacterium avium subsp. paratuberculosis (MAP) field isolates. METHODS AND RESULTS: MALDI-TOF MS approach is becoming one of the most popular tests for the identification of intact bacterial cells which has been shown to be fast and reliable. For this purpose, 36 MAP field isolates were analysed through MALDI-TOF MS and the spectra compared with two different databases: one provided by the vendor of the system employed (Biotyper Version 3...
November 21, 2016: Journal of Applied Microbiology
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/27847010/nontuberculous-mycobacteria-in-fistula-in-ano-a-new-finding-and-its-implications
#16
Pankaj Garg
OBJECTIVE/BACKGROUND: Nontuberculous mycobacteria (NTM) are not known to be associated with fistula-in-ano. NTM was detected in three fistula-in-ano patients in our series. In this study, related data was reviewed to find the mycobacterial disease in patients in our database. METHODS: In this study, 311 consecutive fistula-in-ano patients operated over 2years were analyzed. The histopathology of anal fistula tract epithelial lining of every operated patient was analyzed and other tests (real-time-polymerase chain reaction [RT-PCR], GeneXpert, and mycobacterial culture) were conducted in patients with high index of suspicion of having mycobacterial disease...
September 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/27846606/emergence-and-spread-of-a-human-transmissible-multidrug-resistant-nontuberculous-mycobacterium
#17
Josephine M Bryant, Dorothy M Grogono, Daniela Rodriguez-Rincon, Isobel Everall, Karen P Brown, Pablo Moreno, Deepshikha Verma, Emily Hill, Judith Drijkoningen, Peter Gilligan, Charles R Esther, Peadar G Noone, Olivia Giddings, Scott C Bell, Rachel Thomson, Claire E Wainwright, Chris Coulter, Sushil Pandey, Michelle E Wood, Rebecca E Stockwell, Kay A Ramsay, Laura J Sherrard, Timothy J Kidd, Nassib Jabbour, Graham R Johnson, Luke D Knibbs, Lidia Morawska, Peter D Sly, Andrew Jones, Diana Bilton, Ian Laurenson, Michael Ruddy, Stephen Bourke, Ian C J W Bowler, Stephen J Chapman, Andrew Clayton, Mairi Cullen, Owen Dempsey, Miles Denton, Maya Desai, Richard J Drew, Frank Edenborough, Jason Evans, Jonathan Folb, Thomas Daniels, Helen Humphrey, Barbara Isalska, Søren Jensen-Fangel, Bodil Jönsson, Andrew M Jones, Terese L Katzenstein, Troels Lillebaek, Gordon MacGregor, Sarah Mayell, Michael Millar, Deborah Modha, Edward F Nash, Christopher O'Brien, Deirdre O'Brien, Chandra Ohri, Caroline S Pao, Daniel Peckham, Felicity Perrin, Audrey Perry, Tania Pressler, Laura Prtak, Tavs Qvist, Ali Robb, Helen Rodgers, Kirsten Schaffer, Nadia Shafi, Jakko van Ingen, Martin Walshaw, Danie Watson, Noreen West, Joanna Whitehouse, Charles S Haworth, Simon R Harris, Diane Ordway, Julian Parkhill, R Andres Floto
Lung infections with Mycobacterium abscessus, a species of multidrug-resistant nontuberculous mycobacteria, are emerging as an important global threat to individuals with cystic fibrosis (CF), in whom M. abscessus accelerates inflammatory lung damage, leading to increased morbidity and mortality. Previously, M. abscessus was thought to be independently acquired by susceptible individuals from the environment. However, using whole-genome analysis of a global collection of clinical isolates, we show that the majority of M...
November 11, 2016: Science
https://www.readbyqxmd.com/read/27818776/deciphering-the-virulence-factors-of-the-opportunistic-pathogen-mycobacterium-colombiense
#18
M N Gonzalez-Perez, M I Murcia, C Parra-Lopez, J Blom, A Tauch
Mycobacterium avium complex (MAC) contains clinically important nontuberculous mycobacteria worldwide and is the second largest medical complex in the Mycobacterium genus after the Mycobacterium tuberculosis complex. MAC comprises several species that are closely phylogenetically related but diverse regarding their host preference, course of disease, virulence and immune response. In this study we provided immunologic and virulence-related insights into the M. colombiense genome as a model of an opportunistic pathogen in the MAC...
November 2016: New Microbes and New Infections
https://www.readbyqxmd.com/read/27808247/clinical-significance-of-nontuberculous-mycobacteria-isolated-from-respiratory-specimens-in-a-chinese-tuberculosis-tertiary-care-center
#19
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/27789202/use-of-green-fluorescent-protein-labeled-non-tuberculous-mycobacteria-to-evaluate-the-activity-quaternary-ammonium-compound-disinfectants-and-antibiotics
#20
Claudia Cortesia, Teresita Bello, Gustavo Lopez, Scott Franzblau, Jacobus de Waard, Howard Takiff
Although infections with NonTuberculous Mycobacteria have become less common in AIDS patients, they are important opportunistic infections after surgical procedures, likely because they are ubiquitous and not efficiently killed by many commonly used disinfectants. In Venezuela there have recently been many non-tuberculous mycobacteria soft tissue infections after minor surgical procedures, some apparently related to the use of a commercial disinfectant based on a Quaternary Ammonium Compound. We studied the activity of this and other quaternary ammonium compounds on different non-tuberculous mycobacteria by transforming the mycobacteria with a dnaA-gfp fusion and then monitoring fluorescence to gauge the capacity of different quaternary ammonium compounds to inhibit bacterial growth...
October 11, 2016: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
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