本期刊载了刘又宁等《中国城市成人社区获得性肺炎665例病原学多中心调查》一文,此项研究历时1年,有全国7个城市、12个研究中心参加,按照共同研究制定的入选标准,前瞻性地观察了符合标准的成年患者共计665例,在完善质量控制的条件下,集中进行了痰标本的细菌培养和血清学测定,并 This issue contains Liu Youning et al., “665 Etiological Multi-center Surveys of Adult-acquired Community-acquired Pneumonia in Chinese Cities”. The study lasted for one year and was attended by seven cities and 12 research centers across the country. According to the inclusion criteria set by the joint study , Prospectively observed a total of 665 adult patients in line with the standard, under the conditions of improving the quality control, focused on bacterial culture and serological determination of sputum samples, and