Epidemiological analysis of syphilis in Zhoushan City: 2005-2011

Objective To analyze the epidemiological features of syphilis in Zhoushan City from 1995 to 2011,and provide evidence for its control and prevention.Methods Theepidemic information of syphilis was colllected thuough the national disease surveillance report system,and analyzed by descriptive epidemiologic method.Results There were 9988 cases of syphilis reported from 1995 to 2011.The average armual reported incidence rate was 132.38/105,and average growth rate was 40.15％.Among 9988 cases,2936 cases were primary syphilis (29.30％),2262 cases were secondary syphilis (22.65％),54 cases were tertiary syphilis (0.54％),243 cases were congeniul syphilis (2.43％)and 4503 cases were latent syphilis (45.08％).The annual growth rate of latent syphilis incidence was as high as 146.76％.Most of the patients (74.70％) age was between 25 and 55.More cases occurred in females than in males with the gender ratio of 1.10∶1.High-risk grups were houseworkers/unemployees,farmers and fishermen,accouting for 41.00％,14.51％ and 12.98％ respectivvely.Conclusions Syphilis incidence is increased annually in Zhoushan City.It is necessary to take specific prevention measures to control the syphilis effectively. Key words: Syphilis;  Epidemiology;  Analysis