Primary syphilis
If you are sexually active, practice safe sex and always use a condom.
All pregnant women should be screen for syphilis.
U.S. Preventive Services Task Force. Screening for Syphilis Infection: Recommendation Statement. Ann Fam Med. 2004;2:362-365.
Tremont EC. Treponema pallidum (Syphilis). In: Mandell GL, Bennett JE, Dolin R, eds. Principles and Practice of Infectious Diseases. 6th ed. Philadelphia, Pa: Churchill Livingstone Elsevier; 2005: chap 235.