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Nontuberculous mycobacterium infection

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https://www.readbyqxmd.com/read/28221128/epidemiology-of-nontuberculous-mycobacterial-lung-disease-and-tuberculosis-hawaii-usa
#1
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/28185617/mycobacterium-kansasii
#2
James C Johnston, Leslie Chiang, Kevin Elwood
The incidence of Mycobacterium kansasii varies widely over time and by region, but this organism remains one of the most clinically relevant isolated species of nontuberculous mycobacteria. In contrast to other common nontuberculous mycobacteria, M. kansasii is infrequently isolated from natural water sources or soil. The major reservoir appears to be tap water. Infection is likely acquired through the aerosol route, with low infectivity in regions of endemicity. Human-to-human transmission is thought not to occur...
January 2017: Microbiology Spectrum
https://www.readbyqxmd.com/read/28160560/exosome-secretome-and-mediated-signaling-in-breast-cancer-patients-with-nontuberculous-mycobacterial-disease
#3
Julie V Philley, Anbarasu Kannan, David E Griffith, Megan S Devine, Jeana L Benwill, Richard J Wallace Jr, Barbara A Brown-Elliott, Foram Thakkar, Varsha Taskar, James G Fox, Ammar Alqaid, Hernaina Bains, Sudeep Gupta, Santanu Dasgupta
Bronchiectasis Nontuberculous mycobacterium (NTMnb) infection is an emerging health problem in breast cancer (BCa) patients. We measured sera exosome proteome in BCa-NTMnb subjects and controls by Mass Spectroscopy. Extracellular matrix protein 1 (ECM1) was detected exclusively in the circulating exosomes of 82% of the BCa-NTMnb cases. Co-culture of ECM1+ exosomes with normal human mammary epithelial cells induced epithelial to mesenchymal transition accompanied by increased Vimentin/CDH1 expression ratio and Glutamate production...
February 1, 2017: Oncotarget
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
#4
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/28131606/antimicrobial-susceptibility-and-mic-distribution-of-41-drugs-against-clinical-isolates-from-china-and-reference-strains-of-nontuberculous-mycobacteria
#5
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
#6
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
#7
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/28077517/two-phase-hospital-associated-outbreak-of-mycobacterium-abscessus-investigation-and-mitigation
#8
Arthur W Baker, Sarah S Lewis, Barbara D Alexander, Luke F Chen, Richard J Wallace, Barbara A Brown-Elliott, Pamela J Isaacs, Lisa C Pickett, Chetan B Patel, Peter K Smith, John M Reynolds, Jill Engel, Cameron R Wolfe, Carmelo A Milano, Jacob N Schroder, Robert D Davis, Matthew G Hartwig, Jason E Stout, Nancy Strittholt, Eileen K Maziarz, Jennifer Horan Saullo, Kevin C Hazen, Richard J Walczak, Ravikiran Vasireddy, Sruthi Vasireddy, Celeste M McKnight, Deverick J Anderson, Daniel J Sexton
BACKGROUND: Nontuberculous mycobacteria (NTM) commonly colonize municipal water and cause healthcare-associated outbreaks. We investigated a biphasic outbreak of Mycobacterium abscessus at a tertiary care hospital. METHODS: Case patients had recent hospital exposure and laboratory-confirmed colonization or infection with M. abscessus from January 2013 through December 2015. We conducted a multidisciplinary epidemiologic, field, and laboratory investigation. RESULTS: The incidence rate of M...
January 11, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28076350/emergence-of-rare-species-of-nontuberculous-mycobacteria-as-potential-pathogens-in-saudi-arabian-clinical-setting
#9
Bright Varghese, Mushira Enani, Mohammed Shoukri, Sahar AlThawadi, Sameera AlJohani, Sahal Al-Hajoj
BACKGROUND: Clinical relevance of nontuberculous mycobacteria (NTM) is increasing worldwide including in Saudi Arabia. A high species diversity of NTM's has been noticed in a recent study. However, the identification in diagnostic laboratories is mostly limited to common species. The impact of NTM species diversity on clinical outcome is so far neglected in most of the clinical settings. METHODOLOGY/PRINCIPAL FINDINGS: During April 2014 to September 2015, a nationwide collection of suspected NTM clinical isolates with clinical and demographical data were carried out...
January 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28063416/nontuberculous-mycobacterial-infection-in-rheumatoid-arthritis-patients-a-single-center-experience-in-south-korea
#10
Doo-Ho Lim, Yong-Gil Kim, Tae Sun Shim, Kyung-Wook Jo, Byeongzu Ghang, Soo Min Ahn, Seokchan Hong, Chang-Keun Lee, Bin Yoo
Background/Aims: Nontuberculous mycobacteria (NTM) infection has been increasing worldwide in both general population and immunocompromised patients, which has also been reported in rheumatoid arthritis (RA) patients. This study aimed to identify the incidence and clinical characteristics of NTM infection in RA patients living in tuberculosis (TB) infection endemic area. Methods: We performed a retrospective analysis of NTM infection cases in our RA registry at a tertiary referral center from January 1995 to December 2013...
January 6, 2017: Korean Journal of Internal Medicine
https://www.readbyqxmd.com/read/28043577/mycobacterium-haemophilum-a-report-of-cutaneous-infection-in-a-patient-with-end-stage-renal-disease
#11
Shahram Sabeti, Mahsa Pourabdollah Tootkaboni, Mitra Abdolahi, Mihan Pourabdollah
INTRODUCTION: Mycobacterium haemophilum is a slow-growing nontuberculous mycobacterium (NTM) that can cause ulcerating cutaneous or subcutaneous nodular skin lesions in immunocompromised and immunocompetent patients. Acid-fast staining cannot distinguish NTM from M. tuberculosis; culturing at two temperatures with iron-supplemented media and polymerase chain reaction (PCR) are needed for optimal detection of M. haemophilum. CASE PRESENTATION: A 32-year-old man with end-stage renal disease, undergoing hemodialysis twice a week, presented with multiple, painless, nonpruritic nodular lesions...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28043565/drug-susceptibility-testing-of-mycobacterium-avium-subsp-avium-isolates-from-naturally-infected-domestic-pigeons-to-avian-tuberculosis
#12
Kaveh Parvandar, Mansour Mayahi, Nader Mosavari, Reza Aref Pajoohi
OBJECTIVE: Avian tuberculosis is one of the most important infections affecting most species of birds. Several mycobacterial species have been identified causing avian tuberculosis, and the organisms confirmed most frequently are Mycobacterium avium and Mycobacterium genavense. Any species of birds can be infected with M. avium. Generally, domesticated fowl or captive wild birds are affected more frequently than those living in the wild. M. avium can not only infect all species of birds, but can also infect some domesticated mammals to cause disease, usually with localized lesion...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28043562/identification-of-nontuberculous-mycobacteria-by-high-performance-liquid-chromatography-from-patients-in-tehran
#13
Ali Mirzapour, Ali Nazari Alam, Saeed Z Bostanabadi, Abdolrazagh H Shahraki, Soltan A Ebrahimi, Masoud Yousefi
BACKGROUND/OBJECTIVES: The genus Mycobacterium contains over 140 species comprises pathogenic and nonpathogenic strains. Nontuberculous mycobacteria (NTM) causing clinical disease have become increasingly common and more diverse. Widespread features of NTM infection can make the diagnosis difficult. Precise species-level detection can aid in distinguishing environmental contamination from actual infection and, furthermore, can assist in making a choice of antimicrobial therapy. MATERIALS AND METHODS: Mycolic acids extracted from saponified mycobacterial cells were examined by high performance liquid chromatography (HPLC) in addition to phenotypic tests for the identification of 20 clinical isolates of mycobacteria at Masoud Laboratory during 2014-2015...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28043560/the-importance-of-single-nucleotide-polymorphisms-in-interferon-gamma-receptor-1-gene-in-pulmonary-patients-infected-with-rapid-grower-mycobacterium
#14
Poopak Farnia, Jalaledin Ghanavi, Payam Tabasri, Shima Saif, Ali Akbar Velayati
OBJECTIVE/BACKGROUND: Interferon gamma (IFN-γ) plays a key role in protective immune response against Mycobacterial infection. IFN-γ excretes its antimycobacterial effectors mechanisms by activation of macrophages and dendritic cells via interaction with its receptor complex, that is, a ligand-binding subunit [IFN-γ receptor (IFNGR)1] and an accessory subunit (IFNGR2) on the cell surface. It has been shown that individuals with complete or partial IFNGR1 receptor deficiency are highly susceptible to infection by nontuberculous mycobacteria (NTM), Mycobacterium tuberculosis, and some Salmonella species...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28000919/antibiotic-treatment-for-nontuberculous-mycobacteria-lung-infection-in-people-with-cystic-fibrosis
#15
REVIEW
Valerie Waters, Felix Ratjen
BACKGROUND: Nontuberculous mycobacteria are mycobacteria, other than those in the Mycobacterium tuberculosis complex, and are commonly found in the environment. Nontuberculous mycobacteria species (most commonly Mycobacterium avium complex and Mycobacterium abscessus) are isolated from the respiratory tract of approximately 5% to 40% of individuals with cystic fibrosis; they can cause lung disease in people with cystic fibrosis leading to more a rapid decline in lung function and even death in certain circumstances...
19, 2016: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/27959960/nontuberculous-mycobacterial-infections-in-a-french-hospital-a-12-year-retrospective-study
#16
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/27918379/nontuberculous-mycobacteria-in-children-a-focus-on-bloodstream-infections
#17
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
#18
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...
February 2017: 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
#19
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/27904603/prevalence-of-nontuberculous-mycobacteria-isolated-from-environmental-samples-in-iran-a-meta-analysis
#20
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
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