It is the least common sexually transmitted disease in the United States. The year 1990 had the peak number of total cases of syphilis in the United States over the last fifty years, at 135,590 cases. African Americans have the highest rates compared with Hispanics and Caucasians. Males contract syphilis at a rate 5.7 times greater than females. Syphilis is often linked with HIV disease.
More Answers from Jill Grimes, MD