OBJECTIVE To explore the risk factors of fungus infection of lower respiratory tract in patients with bronchial asthma and to put forward corresponding precautionary and control measures to provide the basis for controlling the respiratory nosocomial infection.METHODS A retrospective analysis was conducted on the clinical data of 741patients with severe bronchial asthma from Jul.2009to Jul.2011in our department,and non-conditional logistic regression analysis was made on the risk factors leading to fungus i...