To clarify these points: Pathogenicity is defined as the ability of an infectious agent to cause disease or damage in a host.

致病性的定义是一种传染性病原体在宿主体内引起疾病或损害的能力。

Particular chunks of its genome, called " pathogenicity islands" (or Sapis), seem to behave like genetic parasites; bits of DNA that replicate selfishly without regard for the well-being of their host.

其基因组的特定部分，称为“致病性岛”(或致病岛)，似乎表现得像是遗传寄生物; 这些DNA片段会自私地复制，不顾宿主的健康。