The 7 most common STIs/STDs

• Chlamydia (Chlamydia trachomatis): A bacterial infection passed on through vaginal, anal or oral sex. It often causes no symptoms, especially in women, and a short course of antibiotics treats it.
• Gonorrhoea (Neisseria gonorrhoeae): A bacterial infection passed on through vaginal, anal or oral sex. Men often notice burning or discharge, while in women it frequently goes unnoticed, and antibiotics treat it.
• Trichomonas (Trichomonas vaginalis): A tiny parasite passed on through sex. Most people have no symptoms, women are more likely to notice discharge or itching, and a short course of medication treats it.
• Mycoplasma hominis: A bacterium that lives in the genital area of many healthy people without causing problems. A positive result is read together with your symptoms, and often needs no treatment.
• Mycoplasma genitalium: A bacterium passed on through sex that often causes no symptoms. It needs specific antibiotics, so knowing it's there helps your doctor choose the right treatment.
• Ureaplasma parvum: One of the most common bacteria in the genital area, and usually harmless. A positive result without symptoms rarely needs treatment.
• Ureaplasma urealyticum: A bacterium commonly found in the genital area of healthy people. It sometimes causes irritation when you pee, so a positive result is read together with your symptoms.

Guidance only. A test is not a diagnosis. Detection times are approximate and vary from person to person: if the result is negative and the exposure is recent, it may need repeating. Check your results with a healthcare professional.