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

致病性定义是一种染性病原体在宿主体内引起疾病或损害能力。

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.

其基因组特定部分，称为“致病性岛”(或致病岛)，现得像是遗寄生; 这些DNA片段会自私地复制，不顾宿主健康。