Fact Sheets on Sexually Transmissible Infection (STI)

Links to these sexual health fact sheets will take you to Melbourne Sexual Health website for the most current version.


Chlamydia trachomatis is a bacterium that commonly infects the genitals, specifically, the cervix and the urethra. It can also infect the anus, and less commonly, the eye and throat.

Gonorrhoea is caused by the bacterium, Neisseria gonorrhoeae, which can cause an infection of the urethra, cervix, anus, throat and eyes.

Monkeypox is a viral infection that causes lumps or blisters on the skin. It usually has mild symptoms and clears up by itself with the symptoms lasting from 2 to 4 weeks.

Syphilis is a sexually transmitted infection caused by a type of bacterium called Treponema pallidum.

Trichomoniasis is a genital infection caused by the organism Trichomonas vaginalis. Trichomoniasis is usually detected in women, and very rarely detected in men. It is quite uncommon in Australia, and most often found in women who have recently had sex outside Australia. Recent evidence however, has demonstrated a higher rate of infection in the indigenous community in Australia.

FAQ about STIs