This article briefly deals with the research advance in species, distribution, isolation, culture and virulence assay methods of aphid pathogens.

作者通过评述国内外已有的研究报道，概述了蚜虫病原真菌的种类、分布、分离培养及毒力评价方法。

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Objective To study the distribution characteristics of virulence genes in Vibrio parahaemolyticus isolated from seafood in China.

目的 了解中国部分水产品中副溶血性弧菌毒力基因的分布情况。

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To investigate the distribution of virulence associate factors of Streptococcus suis(SS), 8 virulence factors were selected to be detected by PCR assay.

石家庄地区SS的毒力因子分布情况不很清楚，本实验对石家庄地区SS分离株的毒力因子进行检测。

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