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Nontuberculosis mycobacterial infections at a specialized tuberculosis treatment centre in the Republic of Korea

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 res...

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Autores principales: Yoon, Hee Jung, Choi, Hwa Young, Ki, Moran
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5472942/
https://www.ncbi.nlm.nih.gov/pubmed/28619015
http://dx.doi.org/10.1186/s12879-017-2532-4
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author Yoon, Hee Jung
Choi, Hwa Young
Ki, Moran
author_facet Yoon, Hee Jung
Choi, Hwa Young
Ki, Moran
author_sort Yoon, Hee Jung
collection PubMed
description 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. METHODS: A retrospective descriptive study was conducted among patients who were diagnosed with NTM from November 2011 to January 2016 at Seoul Metropolitan Government Seobuk hospital, Korea, using medical records and chest radiography results. Prevalence of NTM using national health insurance data was compared to the prevalence and incidence of Tb using National statistics data. RESULTS: The age- and sex- adjusted prevalence of NTM infection per 100,000 population increased between 2009 (9.4) and 2016 (36.1). However, the prevalence and incidence of Tb per 100,000 population decreased from 106.5 to 74.4, and 81.2 to 61.8, respectively. In total, 64 patients (37 [57.8%] men) were enrolled in the study. Among 33 (51.6%) patients with slowly growing nontuberculous mycobacteria (SGM) infection, 29 were detected with Mycobacterium avium complex (n = 13, M. avium; n = 16, M. intracellulare), and 4 with M. kansasii. Among 31 (48.4%) patients with rapidly growing nontuberculous mycobacteria (RGM) infection, 27 and 4 patients were detected with M. abscessus complex and M. fortuitum complex, respectively. RGM patients were more likely to have current Tb (P = 0.041), cough (P < 0.05), and sputum (P < 0.01) than SGM patients in the univariate analysis, but not in the multivariate analysis. CONCLUSION: Given the increasing prevalence of NTM infections, precise epidemiological and surveillance data should be obtained by reporting NTM infections to public health authorities. Introducing nucleic acid amplification tests to differentiate between Tb and NTM in smear-positive specimens should be considered.
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spelling pubmed-54729422017-06-21 Nontuberculosis mycobacterial infections at a specialized tuberculosis treatment centre in the Republic of Korea Yoon, Hee Jung Choi, Hwa Young Ki, Moran BMC Infect Dis Research Article 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. METHODS: A retrospective descriptive study was conducted among patients who were diagnosed with NTM from November 2011 to January 2016 at Seoul Metropolitan Government Seobuk hospital, Korea, using medical records and chest radiography results. Prevalence of NTM using national health insurance data was compared to the prevalence and incidence of Tb using National statistics data. RESULTS: The age- and sex- adjusted prevalence of NTM infection per 100,000 population increased between 2009 (9.4) and 2016 (36.1). However, the prevalence and incidence of Tb per 100,000 population decreased from 106.5 to 74.4, and 81.2 to 61.8, respectively. In total, 64 patients (37 [57.8%] men) were enrolled in the study. Among 33 (51.6%) patients with slowly growing nontuberculous mycobacteria (SGM) infection, 29 were detected with Mycobacterium avium complex (n = 13, M. avium; n = 16, M. intracellulare), and 4 with M. kansasii. Among 31 (48.4%) patients with rapidly growing nontuberculous mycobacteria (RGM) infection, 27 and 4 patients were detected with M. abscessus complex and M. fortuitum complex, respectively. RGM patients were more likely to have current Tb (P = 0.041), cough (P < 0.05), and sputum (P < 0.01) than SGM patients in the univariate analysis, but not in the multivariate analysis. CONCLUSION: Given the increasing prevalence of NTM infections, precise epidemiological and surveillance data should be obtained by reporting NTM infections to public health authorities. Introducing nucleic acid amplification tests to differentiate between Tb and NTM in smear-positive specimens should be considered. BioMed Central 2017-06-15 /pmc/articles/PMC5472942/ /pubmed/28619015 http://dx.doi.org/10.1186/s12879-017-2532-4 Text en © The Author(s). 2017 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
spellingShingle Research Article
Yoon, Hee Jung
Choi, Hwa Young
Ki, Moran
Nontuberculosis mycobacterial infections at a specialized tuberculosis treatment centre in the Republic of Korea
title Nontuberculosis mycobacterial infections at a specialized tuberculosis treatment centre in the Republic of Korea
title_full Nontuberculosis mycobacterial infections at a specialized tuberculosis treatment centre in the Republic of Korea
title_fullStr Nontuberculosis mycobacterial infections at a specialized tuberculosis treatment centre in the Republic of Korea
title_full_unstemmed Nontuberculosis mycobacterial infections at a specialized tuberculosis treatment centre in the Republic of Korea
title_short Nontuberculosis mycobacterial infections at a specialized tuberculosis treatment centre in the Republic of Korea
title_sort nontuberculosis mycobacterial infections at a specialized tuberculosis treatment centre in the republic of korea
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5472942/
https://www.ncbi.nlm.nih.gov/pubmed/28619015
http://dx.doi.org/10.1186/s12879-017-2532-4
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