low virulent strain

基本解釋

This strain was found to be multiform in morphology, atypical in colony shape, low virulent for laboratory animals and short of antigenicity;
該菌株形態(tài)呈多形性，菌落不典型，對(duì)動(dòng)物的毒力弱并失去抗源性；
The N strain of porcine parvovirus was a natural low virulent variant strain, which was isolated from the viscera of a stillborn fetus farrowed by a gilt in Guangxi.
豬細(xì)小病毒N株是從廣西初產(chǎn)母豬所產(chǎn)死胎臟器分離的自然弱毒株。