Final answer:
Syphilis has different stages, each with its own set of symptoms. Chancres occur in the primary stage, a non-itching rash appears in the secondary stage, no symptoms are apparent in the latent stage, and heart disease, blindness, paralysis, or insanity may occur in the tertiary stage.
Step-by-step explanation:
The symptoms of syphilis vary depending on the stage of the disease. In the primary stage, which is the first stage, the infected person may experience chancres. These chancres are firm, round, and painless sores that appear at the location where the syphilis bacteria entered the body. In the secondary stage, the symptoms may include a non-itching rash on the chest, arms, and legs. This stage is also characterized by other systemic symptoms such as fever and swollen lymph glands. In the latent stage, which is the third stage, there are no apparent symptoms to the infected person, but the bacteria are still present in the body. Finally, in the tertiary stage, the symptoms may include heart disease, blindness, paralysis, or insanity. This stage is the most severe and can lead to damage of internal organs.