There have been 83 syphilis patients in four years, taking up 4.68 percent of sexually transmitted diseases at Khanh Hoa venereology and dermatology hospital. The age ranges tretween 19-90. Patient groups aged 15-50 (48.19 percent) and group of 51-80 years of age (49.39 percent) take up the highest percentage. Men occupy 60.2 percent while women take up 39.8 percent. Most of the patients reside in Nha Trang city and Ninh Hoa town, including 6 foreigner patients who work in Khanh Hoa province. There's variation between married group (89.2 percent) and unmarried group (10.8 percent) in term of infection rate. People having several sexual partners take up 55.42 percent. Only 33.73 percent of people have sex with condoms. Besides skin disease patients, most patients are recommended by obstetric and gynecological clinics. 94 percent of detected cases are late, latent syphilis.