分析表明，总体变异系数较低，总株数较多的样地，有着更好的抽样效果。

It was demonstrated that the lower CV, the larger the number of all trees, the better effectivity this sampling technique had.

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结果院内感染分离的156株9种深部真菌，以白色念珠菌和热带念珠菌为主，分别占总株数的57．69％、31．41％；

RESULTS 156 strains with 9 species deep fungi that main fungi were Candida albicans, C. tropicalis with 57.69%, 31.41%. isolated from nosocomial infection.

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