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epidemiology of mycobacteria

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https://www.readbyqxmd.com/read/28628437/nontuberculous-mycobacteria-infections-at-a-provincial-reference-hospital-cambodia
#1
Maryline Bonnet, Kim Chamroeun San, Yati Pho, Chandara Sok, Jean-Philippe Dousset, William Brant, Northan Hurtado, Khun Kim Eam, Elisa Ardizzoni, Seiha Heng, Sylvain Godreuil, Wing-Wai Yew, Cathy Hewison
Prevalence of nontuberculous mycobacteria (NTM) disease is poorly documented in countries with high prevalence of tuberculosis (TB). We describe prevalence, risk factors, and TB program implications for NTM isolates and disease in Cambodia. A prospective cohort of 1,183 patients with presumptive TB underwent epidemiologic, clinical, radiologic, and microbiologic evaluation, including >12-months of follow-up for patients with NTM isolates. Prevalence of NTM isolates was 10.8% and of disease was 0.9%; 217 (18...
July 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28619015/nontuberculosis-mycobacterial-infections-at-a-specialized-tuberculosis-treatment-centre-in-the-republic-of-korea
#2
Hee Jung Yoon, Hwa Young Choi, Moran Ki
BACKGROUND: The incidence of nontuberculous mycobacteria (NTM) infections is increasing worldwide, however formal evaluations of the epidemiology of NTM infections are limited. Understanding the trends and true prevalence of NTM is a major priority for optimizing infection control programmes and resources. The purpose of this study was to investigate the epidemiology, clinical manifestations, and radiologic findings in NTM-infected patients at specialized Tuberculosis (Tb) treatment centre in South Korea, which is endemic to Tb, and find solutions to control NTM infections...
June 15, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28594574/a-geospatial-epidemiologic-analysis-of-nontuberculous-mycobacterial-infection-an-ecological-study-in-colorado
#3
Ettie M Lipner, David Knox, Joshua French, Jordan Rudman, Michael Strong, James L Crooks
RATIONALE: Nontuberculous mycobacteria (NTM) are ubiquitous environmental microorganisms. Infection is thought to result primarily from exposure to soil and/or water sources. NTM disease prevalence varies greatly by geographic region, but the geospatial factors influencing this variation remain unclear. OBJECTIVES: To identify socio-demographic and environmental ecologic risk factors associated with NTM infection and disease in Colorado. METHODS: We conducted an ecological study combining data from patients with a diagnosis of NTM disease from National Jewish Health's Electronic Medical Record database and zip code-level socio-demographic and environmental exposure data obtained from the U...
June 8, 2017: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/28548990/outbreaks-of-nontuberculous-mycobacteria
#4
Geeta Sood, Nikki Parrish
PURPOSE OF REVIEW: The purpose of this review is to summarize the emerging literature on nontuberculous mycobacteria outbreaks in healthcare settings. As our ability to identify mycobacterial species develops, we are better able to recognize epidemiologic connections and better understand the prevalence and importance of these outbreaks and pseudo-outbreaks in healthcare settings. RECENT FINDINGS: The number of outbreaks related to nontuberculous outbreaks is increasing because of heightened awareness and better diagnostic tests for species level identification of mycobacteria...
May 25, 2017: Current Opinion in Infectious Diseases
https://www.readbyqxmd.com/read/28542092/approach-to-skin-and-soft-tissue-infections-in-non-hiv-immunocompromised-hosts
#5
Victoria E Burke, Fred A Lopez
PURPOSE OF REVIEW: Skin and soft tissue infections are frequent contributors to morbidity and mortality in the immunocompromised host. This article reviews the changing epidemiology and clinical manifestations of the most common cutaneous pathogens in non-HIV immunocompromised hosts, including patients with solid organ transplants, stem cell transplants, solid tumors, hematologic malignancies, and receiving chronic immunosuppressive therapy for inflammatory disorders. RECENT FINDINGS: Defects in the innate or adaptive immune response can predispose the immunocompromised host to certain cutaneous infections in a predictive fashion...
May 24, 2017: Current Opinion in Infectious Diseases
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/28381605/nontuberculous-mycobacteria-in-greenland-novel-epidemiological-insights-from-a-high-tuberculosis-incidence-setting
#7
LETTER
Thomas S Hermansen, Allan Gelvan, Troels Lillebaek
No abstract text is available yet for this article.
June 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28348502/nontuberculous-mycobacteria-in-saudi-arabia-and-gulf-countries-a-review
#8
REVIEW
Hawra Al-Ghafli, Sahal Al-Hajoj
Nontuberculous Mycobacteria (NTM) are causing growing health problems worldwide. This is indicated by an increasing amount of scientific reports showing not only well-identified species reemerging but also emergence of new species. The emergence and reemergence of NTM are particularly worrying in developing countries due to scarce published data and improper identification. Here we aimed to examine the main epidemiological aspects and diagnostic challenges associated with NTM in countries of the Gulf Cooperation Council (GCC) and compare these findings to the international arena findings...
2017: Canadian Respiratory Journal: Journal of the Canadian Thoracic Society
https://www.readbyqxmd.com/read/28326308/infection-sources-of-a-common-non-tuberculous-mycobacterial-pathogen-mycobacterium-avium-complex
#9
REVIEW
Yukiko Nishiuchi, Tomotada Iwamoto, Fumito Maruyama
Numerous studies have revealed a continuous increase in the worldwide incidence and prevalence of non-tuberculous mycobacteria (NTM) diseases, especially pulmonary Mycobacterium avium complex (MAC) diseases. Although it is not clear why NTM diseases have been increasing, one possibility is an increase of mycobacterial infection sources in the environment. Thus, in this review, we focused on the infection sources of pathogenic NTM, especially MAC. The environmental niches for MAC include water, soil, and dust...
2017: Frontiers in Medicine
https://www.readbyqxmd.com/read/28321580/increasing-isolation-of-rapidly-growing-mycobacteria-in-a-low-incidence-setting-of-environmental-mycobacteria-1994-2015
#10
F Alcaide, M J Peña, D Pérez-Risco, D Camprubi, L Gonzalez-Luquero, M D Grijota-Camino, J Dorca, M Santin
To determine trends in incidence and clinical relevance of rapidly growing mycobacteria (RGM) in a low-prevalence region of non-tuberculous mycobacteria. We retrospectively identified all patients with RGM-positive cultures between January 1994 and December 2015. Trends in incidence, clinical significance, and outcomes were assessed. One hundred and forty patients had RGM-positive cultures (116 respiratory and 24 extra-respiratory sources). The incidence of RGM isolates increased steadily from 2003 (0.34 per 100,000) to 2015 (1...
March 20, 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/28317798/nontuberculous-mycobacterial-species-and-mycobacterium-tuberculosis-complex-coinfection-in-patients-with-pulmonary-tuberculosis-in-dr-soetomo-hospital-surabaya-indonesia
#11
Ni Made Mertaniasih, Deby Kusumaningrum, Eko Budi Koendhori, Tutik Kusmiati, Desak Nyoman Surya Suameitria Dewi
OBJECTIVE/BACKGROUND: The aim of this study was to analyze the detection of nontuberculous mycobacterial (NTM) species derived from sputum specimens of pulmonary tuberculosis (TB) suspects. Increasing prevalence and incidence of pulmonary infection by NTM species have widely been reported in several countries with geographical variation. MATERIALS AND METHODS: Between January 2014 and September 2015, sputum specimens from chronic pulmonary TB suspect patients were analyzed...
January 2017: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28242674/in-vitro-activity-of-bedaquiline-against-nontuberculous-mycobacteria-in-china
#12
Yu Pang, Huiwen Zheng, Yaoju Tan, Yuanyuan Song, Yanlin Zhao
The main goal of our study was to evaluate the in vitro bedaquiline susceptibility of six prevalent species of pathogenic nontuberculous mycobacteria (NTM) in China. In addition, we investigated the potential molecular mechanisms contributing to bedaquiline resistance in the different NTM species. Among slowly growing mycobacteria (SGM), bedaquiline exhibited the highest activity against Mycobacterium avium; the MIC50 and MIC90 values were 0.03 and 16 mg/liter, respectively. Among rapidly growing mycobacteria (RGM), Mycobacterium abscessus subsp...
May 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28221128/epidemiology-of-nontuberculous-mycobacterial-lung-disease-and-tuberculosis-hawaii-usa
#13
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/28157472/the-100-most-cited-articles-on-non-tuberculous-mycobacterial-infection-from-1995-to-2015
#14
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/28118021/notification-of-nontuberculous-mycobacteria-an-australian-perspective
#15
Rachel Thomson, Ellen Donnan, Anastasios Konstantinos
In Queensland, Australia, all cases of mycobacterial infection (tuberculosis [TB] and nontuberculous mycobacteria [NTM]) are notifiable under the Queensland Public Health Act (2005). This process originally emerged to avoid NTM confounding with notification of cases of TB, but has facilitated awareness of the increasing incidence and changing epidemiology of NTM. Although initially not a public health priority, the notification process has facilitated research that has led to an appreciation of both public health and environmental health issues associated with these pathogens...
March 2017: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/28095429/high-rates-of-non-tuberculous-mycobacteria-isolation-in-mozambican-children-with-presumptive-tuberculosis
#16
Elisa López-Varela, Alberto L García-Basteiro, Orvalho J Augusto, Oscar Fraile, Helder Bulo, Tasmiya Ira, Kizito Gondo, Jakko van Ingen, Denise Naniche, Jahit Sacarlal, Pedro L Alonso
INTRODUCTION: Non-tuberculous mycobacteria (NTM) can cause disease which can be clinically and radiologically undistinguishable from tuberculosis (TB), posing a diagnostic and therapeutic challenge in high TB settings. We aim to describe the prevalence of NTM isolation and its clinical characteristics in children from rural Mozambique. METHODS: This study was part of a community TB incidence study in children <3 years of age. Gastric aspirate and induced sputum sampling were performed in all presumptive TB cases and processed for smear testing using fluorochrome staining and LED Microscopy, liquid and solid culture, and molecular identification by GenoType® Mycobacterium CM/AS assays...
2017: PloS One
https://www.readbyqxmd.com/read/28094581/early-immunopathological-events-in-acute-model-of-mycobacterial-hypersensitivity-pneumonitis-in-mice
#17
Elisabet Johansson, Gregory P Boivin, Jagjit S Yadav
Prolonged exposure to antigens of non-tuberculous mycobacteria species colonizing industrial metalworking fluid (MWF), particularly Mycobacterium immunogenum (MI), has been implicated in chronic forms of hypersensitivity pneumonitis (HP) in machinists based on epidemiology studies and long-term exposure of mouse models. However, a role of short-term acute exposure to these antigens has not been described in the context of acute forms of HP. This study investigated short-term acute exposure of mice to MI cell lysate (or live cell suspension) via oropharyngeal aspiration...
December 2017: Journal of Immunotoxicology
https://www.readbyqxmd.com/read/28087944/laboratory-diagnosis-and-susceptibility-testing-for-mycobacterium-tuberculosis
#18
Gary W Procop
The laboratory, which utilizes some of the most sophisticated and rapidly changing technologies, plays a critical role in the diagnosis of tuberculosis. Some of these tools are being employed in resource-challenged countries for the rapid detection and characterization of Mycobacterium tuberculosis. Foremost, the laboratory defines appropriate specimen criteria for optimal test performance. The direct detection of mycobacteria in the clinical specimen, predominantly done by acid-fast staining, may eventually be replaced by rapid-cycle PCR...
December 2016: Microbiology Spectrum
https://www.readbyqxmd.com/read/28077517/two-phase-hospital-associated-outbreak-of-mycobacterium-abscessus-investigation-and-mitigation
#19
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 supplies 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...
April 1, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28043599/genetic-diversity-transmission-dynamics-and-drug-resistance-of-mycobacterium-tuberculosis-in-luanda-angola
#20
João Perdigão, Sofia Clemente, Jorge Ramos, Pedro Masakidi, Diana Machado, Carla Silva, Isabel Couto, Miguel Viveiros, Nuno Taveira, Isabel Portugal
OBJECTIVE/BACKGROUND: Despite the important role that the African region plays in a global tuberculosis (TB) epidemiological context, many countries in the region still lack data on the prevalence of specific Mycobacterium tuberculosis strains and drug resistance. This is the case for Angola, which presently lacks any data concerning drug-resistance rates and prevalence of specific M. tuberculosis genotypes and respective population structure. In this study, we made the first characterization of the genetic diversity and drug resistance of M...
December 2016: International Journal of Mycobacteriology
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