比如说，M18组的致病性链球菌（可导致急性风湿症而引起发热症状）所含有的第178号鹅口疮（致病基因）在M1组的链球菌属中就无法找到。
For example, the genome of the serotype M18 group of Streptococcus pyogenes associated with acute rheumatic fever contains 178 ORFs not present in the genomic sequence of an M1 serotype .
动物试验表明10株猪链球菌对小鼠均有致病性。
Animal Test shows 10 strains were all highly pathogenic to mice.
目的分离与纯化致中毒性休克综合征缓症链球菌外毒素蛋白，并对其致病性进行初步研究。
Objective in order to isolate and purify an exotoxin of Streptococcus mitis which can cause toxic shock syndrome and investigate its pathogenicity.
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