Abstract: In order to understand the characteristics of incidence,distribution and epidemic trends of syphilis in our country and to provide information for the government to make strategies and control program of syphilis,an epidemic survey of syphilis was caried out in 38 urban surveilance sites for the years 1990 through 1994.During the 5-year period 5078 syphilis cases were found,accounting for 1.34% of all STD cases.The average annual incidence of syphilis was 0.94 cases per 100000 population,the rate for men being 1.09/10000 and for women 0.75/100000.The early syphilis made up 94.70% of total syphilis cases,among them primary syphilis 20.16%,secondary syphilis 46.51% and early latent syphilis 28.10%.In addition,there were 2.10% tertiary syphilis,and 0.70% congenital syphilis.The rates among 20～29 and 30～39 age groups were the highest,being 1.80/100000 and 1.56/100000,respectively.

Key words: Syphilis