Copd_a_219821 2563..2573

1Department of Respiratory Medicine, State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute for Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, People’s Republic of China; 2Department of Respiratory Medicine, Shenzhen People’s Hospital, Shenzhen, Guangdong, People’s Republic of China Background: Pseudomonas aeruginosa (PA) colonization confers poor prognosis in bronchiec-