Our fact sheets provide up to date information on STIs and sexual health conditions. Some fact sheets are available to download in other languages.
Bacterial vaginosis is a bacterial infection caused by a change in the normal balance of vaginal bacteria.
Chlamydia is a very common bacterial STI which can be passed on during sex without a condom or other barrier method.
Genital warts is a common STI, caused by the human papilloma virus (HPV) and can be passed on by skin-to-skin contact during sex.
Gonorrhoea is a common STI caused by bacteria and can be passed on during sex without a condom.
Hepatitis A is a viral infection which can be passed on when faeces from a person with Hep A enters the mouth of another person.
Hepatitis B is a viral infection which can be passed on during sex without a condom or by sharing unsterile injecting equipment with someone who has Hep B.
Hepatitis C is a viral infection which is passed on by the blood from a person with Hep C entering another person’s bloodstream, usually through sharing injecting drug equipment.
Herpes is a common STI, caused by the herpes simplex virus (HSV) and can be passed on by skin-to-skin contact during sexual contact.
Human immunodeficiency virus (HIV) attacks the immune system which makes it difficult for the body to fight infections. HIV can be passed on through the bodily fluids (such as blood, semen, vaginal fluid and anal fluid) of a person who has HIV with a detectable viral load, usually by having sex without a condom or sharing injecting equipment.
Lymphogranuloma venereum (LGV) is an STI caused by certain strains of chlamydia which can be passed on during sex without a condom.
Molluscum contagiosum (MC) is a harmless skin infection caused by a virus and can be passed on by skin-to-skin contact.
Mycoplasma genitalium (MG) is a bacterial infection which can be passed on during sex without a condom.
Pelvic inflammatory disease (PID) is inflammation or infection of the reproductive system in the pelvis. PID can be caused by STIs such as chlamydia, gonorrhoea and mycoplasma genitalium. PID only affects people with a vagina and uterus.
Post exposure prophylaxis (PEP) is a HIV medication which is taken within 72 hours of possible exposure to HIV infection and is taken for 28 days.
PrEP is medication used to prevent HIV.
Pubic lice are tiny parasite insects that infest the pubic hair, armpits or chest hair and can be passed on by skin-to-skin contact.
Scabies is an infestation of the skin by a tiny eight-legged mite and can be passed on by skin-to-skin contact.
Syphilis is a bacterial STI and can be passed on through skin-to skin contact.
Thrush is a common infection caused by an overgrowth of yeasts which naturally occur in the vagina.
Trichomoniasis is an infection of the genitals and can be passed on during sex without a condom.
Urethritis is the term used to describe inflammation in the urethra.
Urinary tract infections (UTIs) are caused by microorganisms (usually bacteria) which can cause an infection in the bladder and other parts of the urinary tract (such as the kidneys)