未经治疗梅毒的病程   /   The stages of untreated syphilis

本图表概述未经治疗梅毒的疾病发展过程：1.一期梅毒：通常在感染的部位仅有一个溃口或溃疡。2.二期梅毒：皮疹、毛发脱落和流感样症状出现。3.潜伏期：可延续1-30年；无外在症状。4.晚期梅毒：严重地损害心脏、脑和其他内部器官。最终可导致死亡。但是，多半的感染者决不会进入梅毒的此期病程。

This chart summarizes the development of untreated syphilis: 1. Primary stage: There is usually only one sore or ulcer at the point of infection. 2. Secondary stage: A skin rash, a loss of hair, and flu-like symptoms usually appear. 3. Latent phase: It can last from one to 30 years; there are no outward symptoms. 4. Late stage: Syphilis may manifest very serious damage to the heart, the brain, and other internal organs. This may even lead to death. However, more than half of the infected never enter this stage of syphilis.