Sores occur mainly on the external genitalia, vagina, anus, or in the rectum. The sores can also occur on the lips and in the mouth. The modes of transmission are -
- Close sexual contact with an infected person.
- An infected mother can pass on the infection to the child during birth.
- Blood transfusion from infected person.
Syphilis cannot be transmitted due to sharing of bathrooms, toilets, towels or utensils.