The most common focus of infection was the respiratory tract, followed by urinary and biliary tracts, skin and tuberculosis, etc.

感染的临床类型以肺部及上呼吸道最为多见，其次为尿路感染及胆道感染。

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Objective: the purpose of the investigation was to analyze the predisposing factors for the infection of the lower respiratory tracts in in-patients and give an information on its control.

目的：调查医院内下呼吸道感染的易感因素，为感染防治提供依据。

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