Primary and Secondary Syphilis –– United States, 2005-2013
This report contains CDC analysis of notifiable disease surveillance data on reported syphilis, including patient demographics and stage of syphilis as reported by health departments to the National Notifiable Diseases Surveillance System (NNDSS) for cases diagnosed during (2005-2013). Trends in annual primary and secondary syphilis were analyzed for 2005-2013; geographic trends were analyzed by US census region, age group, and NNDSS racial/ethnic categories.