Risk Factors
Risk factors for sexually transmitted diseases include:
* sexual activity among young adults 25 and younger
* multiple sex partners
* prior history of STDs
* unprotected sex
* sexual contact with sex workers
* illicit drug use[[br]]
[[br]]
Those who fall within one or more of these categories should be tested for STDs in regular intervals. Sites of primary syphilis infection may include penis, rectum, anus, vagina, cervix, vulva, or mouth.Related Risk Factors Indicators: