南京市校园室内空气微生物特征

为调查南京市学校教室内空气微生物污染状况，本研究各选一所幼儿园、小学、初中和大学，每所学校分别随机选取10间教室，采用六级安德森采样器进行空气微生物采样.研究发现，在南京地区所调研的这4所不同类型的学校中，幼儿园室内空气微生物浓度最高，细菌和真菌浓度均值分别为605CFU/m³和648CFU/m³，均显著高于其余3所学校.室内细菌和真菌粒径分布趋同，峰值均出现在Ⅴ级（1.1~2.1μm）.仅在大学教室内，发现环境参数与空气微生物浓度存在显著相关性.幼儿园教室内学生每天吸入的细菌和真菌剂量分别为150.2CFU/kg和160.9CFU/kg，均显著高于其他学校学生.

Characteristics of airborne microorganisms in school classrooms in Nanjing

In order to investigate indoor airborne microbial contamination in school classrooms, air samples were collected with six-stage Andersen samplers in classrooms at a kindergarten, a primary school, a middle school and a university in Nanjing, Jiangsu. Ten classrooms in each school were randomly selected. Among the four types of school surveyed, the kindergarten classrooms were found to have the maximum concentration of airborne bacteria and fungi. The mean concentrations of bacteria and fungi were 605CFU/m³ and 648CFU/m³, respectively, which were much higher than that in the other three schools. The size distributions of indoor airborne bacteria and fungi were similar cross all four types of school, with the peak at the stage 5 (1.1~2.1μm). The correlation between indoor environmental parameters and airborne microorganisms was only found to be significant in university classrooms. The daily inhalation doses of airborne bacteria and fungi for kindergarten students were highest at 150.2CFU/kg and 160.9CFU/kg respectively. The study provided some evidence data to evaluate the risk of airborne microbial contamination in schools.