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1989年8～9月,对市辖15所幼儿园进行了细菌污染调查。调查中,共采集86间教室的空气标本(平板暴露法),合格者(<2500 cfu/m~3)20间,合格率为23.26％。其中细菌总数≥>4500cfu/m~3者有30间,占34.88％;≥7000 cfu/m~3者仍有8间,占9.30％。按班级观察,小班的合格率较低,仅为14.29％,大、中班的合格率为26.67～28.57％。对各种环境物体表面,采样166份,超标(>8cfu/cm~2)104份,细菌总数介于167～1685
From August to September 1989, a survey of bacterial contamination of 15 kindergartens under the jurisdiction of the government was conducted. During the investigation, a total of 86 air samples (plate exposure method) were collected from classrooms, 20 qualified (<2500 cfu / m ~ 3), with a pass rate of 23.26%. Among them, 30 of the total number of bacteria ≥ 4500cfu / m ~ 3, accounting for 34.88%; there are still 8 of ≥7000 cfu / m ~ 3 accounting for 9.30%. According to class observation, the passing rate of small classes is relatively low, only 14.29%. The passing rate of large and medium classes is 26.67 ~ 28.57%. For all kinds of environmental objects, 166 samples were collected, 104 samples were over-standard (> 8cfu / cm ~ 2), and the total number of bacteria was between 167 ~ 1685