This figure shows the notification rates of all categories of non-congenital syphilis infection in Australia, from 2006 to 2011. The figure illustrates the notification rates of infectious syphilis, less than two years duration, and the notification rates for syphilis of more than two years or unknown duration. The figure demonstrates that between 2006 and 2011, infectious syphilis less than two years duration contributes slightly less to the total notification rates of all categories of non-congenital syphilis infection than syphilis of more than two years or unknown duration.