两种空气中微生物采样方法的实验观察

对固体撞击式采样法与平板沉降法进行初步实验，结果表明，使用固体撞击式采样法测定空气微生物的含量总数与平板沉降法采获的总数结果差异有显著性（Ｐ＜０．０５）。平板沉降法只能收集到较大颗粒的微生物，不能作精确的定量计数，它可作为一般卫生学的检验手段。固体撞击式采样法对悬浮于空气中小颗粒微生物捕获率高于沉降法，并能较准确地表达出空气中细菌的实际含量，是一种较理想的采样方法。

Comparison between two types of air microorganism sampling

The airflow striking sampling was compared with flat utensils sedimentation sampling for collection of air microorganisms.The result showed that air microorganism count with the former method is more efficient than the latter method(P<0.05).The flat utensils sedimentation sampling only collected larger particles of microorganism so the air microorganism count was not accurate.However,it is still a suitable method in hygiene without other choices.The airflow striking sampling collected more middle and tiny particles for air microorganism than the sedimentation sampling and can accurately show microorganism content in air,so it is an optimal sampling method.