肺炎链球菌和流感嗜血杆菌是主要的细菌病原，但是肺炎克雷伯菌和卡他莫拉菌感染有明显增多。
Haemophilus influenza and Streptococcus pneumoniae are the prominent pathogens of bacterial pneumonia, Klebsiella pneumoniae and Moraxella catarrhalis infection are increasing.
肺炎链球菌和流感嗜血杆菌是主要的细菌病原，但是肺炎克雷伯菌和卡他莫拉菌感染有明显增多。
Haemophilus influenza and Streptococcus pneumoniae are the prominent pathogens of bacterial pneumonia, Klebsiella pneumoniae and Moraxella catarrhalis infection are increasing.
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