This FACT indicates the proportion of diagnosed syphilis cases per 100,000 people in Australian states and territories. Syphilis is a sexually transmitted infection caused by the spirochete bacterium Treponema pallidum subspecies pallidum. The primary route of transmission is through sexual contact; it may also be transmitted from mother to foetus during pregnancy or at birth, resulting in congenital syphilis. Other human diseases caused by related Treponema pallidum include Yaws, Pinta, and Bejel. The signs and symptoms of syphilis vary depending on which of the four stages it presents (primary, secondary, latent, and tertiary).
The numbers here represent the statistics for 2011. The State/Territory with the most cases is the Northern Territory with 13.9 per 100,000 people. The state with the least cases is Tasmania with 0.6 per 100,000 people.