Methods: a retrospective analysis was made of the distribution of the pathogeny of lower respiratory tract infected and of the results of the drug sensitivity test in 46 cases.
方法：回顾总结46例术后并发下呼吸道感染的病原分布及药物敏感试验结果。
METHODS Retrospective analysis of bacterial culture and drug sensitivity was conducted in 218 cases with hospital infection.
方法回顾性分析218 份医院感染病例中的细菌培养与药敏。
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