title: Application of loop-mediated isothermal amplification (LAMP) assay for the rapid diagnosis of pathogenic bacteria in clinical sputum specimens of acute exacerbation of COPD (AECOPD).
abstract: The present study explores the application of LAMP for rapid diagnosis of pathogenic bacteria in clinical sputum specimens of AECOPD as compared with conventional sputum culturing method. 120 sputum specimens of AECOPD patients, 46 sputum specimens of healthy controls, as well as 166 serum specimens as negative controls, were evaluated by LAMP assay using primers of eight typical respiratory pathogens. No cross-reactivity was observed in these negative control species using LAMP assay. The lower detection limit of LAMP assay was approximately 10(3) copies. 25 cases (20.8%) were detected at least one positive bacteria species by conventional sputum culturing method, while 73 cases (60.8%) were tested positive in LAMP assay. Moreover, compared with sputum culture, bacterial titers results of LAMP assay were more consistent with FEV1/FVC value of AECOPD patients. These results indicated that the sensitivity of LAMP assay was significantly higher than that of sputum culturing method.
authors.affiliation: Department of Respiratory Diseases, The First Affiliated Hospital of Nanchang University 17 Yongwaizheng Avenue, Nanchang 330006, People's Republic of China.
authors.forename: Wei
authors.initials: W
authors.lastname: Zhang
authors.affiliation: Department of Respiratory Diseases, The First Affiliated Hospital of Nanchang University 17 Yongwaizheng Avenue, Nanchang 330006, People's Republic of China.
authors.forename: Chuanhui
authors.initials: C
authors.lastname: Chen
authors.affiliation: Department of Respiratory Diseases, The First Affiliated Hospital of Nanchang University 17 Yongwaizheng Avenue, Nanchang 330006, People's Republic of China.
authors.forename: Jian
authors.initials: J
authors.lastname: Cui
authors.affiliation: Department of Respiratory Diseases, The First Affiliated Hospital of Nanchang University 17 Yongwaizheng Avenue, Nanchang 330006, People's Republic of China.
authors.forename: Wei
authors.initials: W
authors.lastname: Bai
authors.affiliation: Department of Respiratory Diseases, The First Affiliated Hospital of Nanchang University 17 Yongwaizheng Avenue, Nanchang 330006, People's Republic of China.
authors.forename: Jing
authors.initials: J
authors.lastname: Zhou
keywords: Acute exacerbation of COPD; conventional culturing method; loop-mediated isothermal amplification (LAMP); pathogenic bacteria; sputum specimen