Loop-mediated isothermal amplification for detection of Legionella pneumophila in respiratory specimens of hospitalized patients in Ahvaz, southwest Iran

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2019
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Abstract
Loop-mediated isothermal amplification for detection of Legionella pneumophila in respiratory specimens of hospitalized patients in Ahvaz, southwest Iran Mojtaba Moosavian,1,2 Sakineh Seyed-Mohammadi,2,3 Morteza Saki,2,3 Fatemeh Shahi,2,3 Mahtab Khoshkholgh Sima,2 Davoud Afshar,4 Sara Barati5 1Infectious and Tropical Diseases Research Center, Health Research Institute, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran; 2Department of Microbiology, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran; 3Student Research Committee, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran; 4Department of Microbiology and Virology, School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran; 5Department of Pathobiology, School of Veterinary, University of Shahid Chamran, Ahvaz, Iran Background: Legionnaires’ disease is an important public health problem that can cause substantial mortality and morbidity. Legionnaires’ disease-risk estimation may be compromised by uncertainties in Legionella-detection methods. The aim of this study was the detection of L. pneumophila in respiratory specimens of hospitalized patients with respiratory symptoms by culture, PCR, and loop-mediated isothermal amplification (LAMP) methods.Methods: Sputum and bronchoalveolar lavage samples were obtained from patients with pneumonia admitted to teaching hospitals in Ahvaz, Iran from June 2016 to March 2017. Isolation of Legionella spp. was done by culturing the samples directly onto buffered charcoal–yeast extract and modified Wadowsky–Yee agar medium. Then, PCR and LAMP assays were performed for detection of L. pneumophila via its mip gene in respiratory specimens.Results: A total of 100 respiratory specimens were collected. Our results showed that 1% of the samples were culture positive for Legionella spp., and 3% and 7% of samples were positive for L. pneumophila using the mip gene on PCR and LAMP assays, respectively.Conclusion: Legionnaires’ disease should be considered in the diagnosis of pulmonary infectious diseases. Also, the LAMP assay is a faster method with higher sensitivity and specificity than conventional methods, such as PCR and culture, for laboratory diagnosis of Legionnaires’ disease. Keywords: Legionella pneumophila, LAMP, PCR, mip gene
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mojtaba2019loopmediatedinfection Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Mojtaba Moosavian;Sakineh Seyed-Mohammadi;Morteza Saki;Fatemeh Shahi;Mahtab Khoshkholgh Sima;Davoud Afshar;Sara Barati and
Journal Infection and drug resistance
Year 2019
DOI
10.2147/IDR.S198099
URL
Keywords Keywords not found

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