摘要目的用PCR方法扩增红色毛癣菌和须癣毛癣菌临床分离株的DNA,观察PCR指纹的差异以及基因型与传统表型的关系, 建立一种红色毛癣菌分子生物学鉴定方法.方法采用寡核苷酸重复序列 (GACA)4, (GTG)5及M13中心序列(5'-GAGGGTGGCGGTTCT-3')等3种引物,扩增 20株红色毛癣菌和须癣毛癣菌临床分离株的DNA,观察产物电泳带型的差异.结果在3种引物的扩增中,均可见红色毛癣菌和须癣毛癣菌呈现出具种特异性的DNA指纹,并检出其中2株原据表型鉴定为须癣毛癣菌的红色毛癣菌.结论红色毛癣菌可以用PCR方法加以鉴定,以(GACA)4作引物区分这两种菌最为合适.

abstractsObjective To observe the unique DNA profile and the relationship between DNA profile and phenotype of Trichophyton rubrum, and establish an effective molecular method to identify T. rubrum.Methods Three primers, including (GACA)4, (GTG)5 and M13 core sequence (5'-GAGGGTG～GCGGTTCT-3'), were used to distinguish variations among 20 clinical isolates of T. rubrum and Trichophyton mentagrophytes.Results Different PCR-fingerprinting was seen between T. rubrum and T. mentagrophytes using three different primers. 2 stains of T. rubrum were identified among 6 supposed T. mentagrophytes.Conclusions T. rubrum can be distinguished using PCR, and (GACA)4 is the most suitable primer.