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Epidemiology of pulmonary disease due to nontuberculous mycobacteria in Southern China, 2013-2016.
BMC Pulmonary Medicine 2018 November 10
BACKGROUND: Pulmonary nontuberculous mycobacteria (NTM) disease is of increasing public health concern in China. Information is limited regarding risk factors associated with this disease in China. The objective of this study was to describe the epidemiology of pulmonary disease due to NTM in Southern China.
METHODS: We retrospectively reviewed the medical records of pulmonary NTM patients registered in the Guangzhou Chest Hospital with positive mycobacterial cultures during 2013-2016. We described sex, age, residence, treatment history, laboratory examination results and comorbidities of pulmonary NTM patients.
RESULTS: Among the 607 NTM cases, the most prevalent species were Mycobacterium avium complex (44.5%), Mycobacterium abscessus complex (40.5%), Mycobacterium kansasii (10.0%) and Mycobacterium fortuitum (2.8%). The male:female ratio was significantly lower among patients infected with rapidly growing mycobacteria (RGM) than among those with slowly growing mycobacteria (SGM). The risk of developing SGM disease significantly increased with advancing age. In addition, pulmonary RGM diseases were more common in migrant population than resident population. Notably, patients with pulmonary RGM diseases were significantly more likely to have bronchiectasis underlying noted than those with SGM diseases. No significant difference was observed in in vitro drug susceptibility among NTM species.
CONCLUSION: Our data illustrate that the M. avium complex is the most predominant causative agent of pulmonary NTM disease in Southern China. Female, migrant population, the presence of bronchiectasis are independent risk factors for pulmonary diseases due to RGM. In addition, the prevalence of SGM increases significantly with advancing age.
METHODS: We retrospectively reviewed the medical records of pulmonary NTM patients registered in the Guangzhou Chest Hospital with positive mycobacterial cultures during 2013-2016. We described sex, age, residence, treatment history, laboratory examination results and comorbidities of pulmonary NTM patients.
RESULTS: Among the 607 NTM cases, the most prevalent species were Mycobacterium avium complex (44.5%), Mycobacterium abscessus complex (40.5%), Mycobacterium kansasii (10.0%) and Mycobacterium fortuitum (2.8%). The male:female ratio was significantly lower among patients infected with rapidly growing mycobacteria (RGM) than among those with slowly growing mycobacteria (SGM). The risk of developing SGM disease significantly increased with advancing age. In addition, pulmonary RGM diseases were more common in migrant population than resident population. Notably, patients with pulmonary RGM diseases were significantly more likely to have bronchiectasis underlying noted than those with SGM diseases. No significant difference was observed in in vitro drug susceptibility among NTM species.
CONCLUSION: Our data illustrate that the M. avium complex is the most predominant causative agent of pulmonary NTM disease in Southern China. Female, migrant population, the presence of bronchiectasis are independent risk factors for pulmonary diseases due to RGM. In addition, the prevalence of SGM increases significantly with advancing age.
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