Sexually Transmitted Infection (STI) Tests Test
STI tests check if you have a sexually transmitted infection. Testing helps you get treatment and avoid spreading the infection to others.
What this test measures
STI tests look for signs of infections passed through sexual contact, including chlamydia, gonorrhea, genital herpes, HIV, and HPV. These infections are caused by bacteria, viruses, or parasites.
What your results mean
Reference ranges vary by laboratory and by your age and sex. MedlinePlus does not publish a single normal range for this test — always read your result against the range printed on your own lab report and discuss it with your provider.
Higher-than-normal results
A positive result means you have an STI. Follow your provider's treatment plan and inform your partner.
Frequently asked questions
What are STIs?
STIs (sexually transmitted infections) are infections passed from one person to another through sexual contact, including vaginal, oral, or anal sex.
How are STIs spread?
STIs are usually spread during sex, but some, like herpes and HPV, can spread through skin-to-skin contact. They can also spread through kissing, pregnancy, childbirth, breastfeeding, blood transfusions, or sharing needles.
What are common STIs?
Common STIs include chlamydia, gonorrhea, genital herpes, HIV, and HPV infection.
Why is STI testing important?
Testing helps you get diagnosed and treated so you can avoid serious complications like blindness, brain damage, infertility, birth defects, and death.
What should I do if I test positive?
Take the medicine as prescribed by your provider and tell your partner so they can get tested and treated if necessary.
Related lab tests
Sources
- MedlinePlus: Sexually Transmitted Infection (STI) Tests — NIH MedlinePlus
Last updated . Information is aggregated from official public sources and is not a substitute for professional medical care.