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STI tests: diagnosis of sexually transmitted infections

What are STIs and why is it important to diagnose them on time?
Sexually transmitted infections (STIs) are a group of diseases that are spread through unprotected sexual contact. Many of them can be asymptomatic for a long time, gradually affecting the body and causing serious complications, such as infertility, chronic inflammation, liver damage, nervous system damage, and even cancer.
Timely testing allows for early detection of infections and initiation of treatment, which significantly reduces the risk of complications and helps prevent their spread.
When should you get tested for STIs?
Laboratory testing for infections should be performed in the following cases:
- after unprotected sexual intercourse
- when symptoms appear (unusual discharge, itching, burning, pain when urinating)
- when planning pregnancy or during pregnancy
- in case of frequent inflammatory processes of the genitourinary system
- for prevention – once every 6-12 months, even in the absence of symptoms
Many infections, such as chlamydia or HPV, can occur without any symptoms, so regular testing is important even for people who have no complaints.
To get a complete picture of your health, it is also recommended to undergo complete blood count on an automatic analyzer, which allows you to assess all basic blood parameters.
What tests are used to diagnose STIs?
Depending on the type of infection and need, the doctor may prescribe different diagnostic methods.
Basic methods of testing for STIs
| Analysis method | What determines | For which infections is it used? |
| PCR (polymerase chain reaction) | Detects pathogen DNA | Chlamydia, gonorrhea, HPV, herpes, syphilis, mycoplasmosis, ureaplasmosis |
| ELISA (enzyme-linked immunosorbent assay) | Detects antibodies to the pathogen | HIV, syphilis, hepatitis B and C, herpes |
| Bacteriological culture | Allows you to detect bacteria and determine their sensitivity to antibiotics | Gonorrhea, trichomoniasis, mycoplasmosis, ureaplasmosis |
| RPR test (rapid syphilis test) | Detects antibodies to Treponema pallidum | Syphilis |
What infections can be detected by tests?
STIs are divided into bacterial, viral, and parasitic.
Bacterial infections
- Gonorrhea – causes purulent inflammation of the genitourinary system.
- Chlamydia – can lead to infertility and chronic inflammation.
- Syphilis – a dangerous systemic infection that affects internal organs and the nervous system.
- Ureaplasmosis and mycoplasmosis – opportunistic bacteria that cause inflammatory processes.
Viral infections
- Human papillomavirus (HPV) – can cause cervical cancer and other cancers.
- Herpes (HSV-1, HSV-2) – causes painful rashes on mucous membranes.
- Hepatitis B and C – affect the liver and can cause cirrhosis or cancer.
- OX – a dangerous chronic disease that affects the immune system.
Parasitic infections
- Trichomoniasis – an infection that affects the genitourinary system and can cause complications during pregnancy.
How to prepare for an STI test?
To obtain accurate results, you should follow certain preparation rules:
- 48 hours before the test abstain from sexual contact.
- Do not take antibiotics for 1-2 weeks before the analysis.
- Women should not take a smear during menstruation. – it is better to take the test 2-3 days after its completion.
- 2-3 hours before taking the smear not to urinate.
- Blood for ELISA and antibodies It is given on an empty stomach, after 8-12 hours of fasting.
- Do not consume alcohol or fatty foods 24 hours before the test.
Following these recommendations will ensure the most accurate research results.
What to do in case of a positive result?
If the tests confirm the presence of infection, you must:
- Consult a doctor – the doctor will select the appropriate treatment.
- Complete a full course of therapy – do not interrupt treatment even after symptoms disappear.
- Inform partner – all sexual partners must undergo treatment.
- Take a repeat test after completing treatment – to make sure there is no infection.
Where can I get tested for STIs?
In the laboratory Medilab Plus you can undergo comprehensive testing for all major STIs.
Advantages of the Medilab Plus laboratory
- Modern equipment for accurate diagnostics.
- Get results quickly with detailed explanations.
- Research confidentiality is guaranteed.
- Comprehensive analysis packages for health assessment.
Regular testing for STIs helps detect infections early and prevent serious complications.

