1. Autoinfection can occur when parasites or infectious agents spread from one part of the body to another within the same individual.

自我感染可能发生在寄生虫或感染性病原体在同一个人的不同部位之间传播时。

2. The patient developed autoinfection when the bacteria from the primary infection site spread to other organs.

当来自原发感染部位的细菌传播到其他器官时，患者发展出了自我感染。