Which STDs Can Be Detected by Blood Tests?

Regular STD testing is crucial for anyone who is sexually active. However, many people avoid these tests because of discomfort caused by traditional methods like swab tests. Fortunately, with the advancements in medical technology, several STDs can be tested using blood and urine.
Urine tests are used for detecting gonorrhoea and chlamydia, while blood tests can show wider range of infections. Below are some common STDs that can be diagnosed through private or commercial blood tests:

HIV

HIV tests are done using blood test, though oral swabs can be used as well. To officially diagnose HIV, two tests should be positive, first the “Initial test” that screens for the virus, second the “Confirmatory test” which verfies the first results.

Herpes (HSV-1 & HSV-2)

Blood tests can detect herpes simplex virus type 1 (HSV-1) and type 2 (HSV-2), but they do not determine whether the infection is oral or genital. When there is no visible sores, understanding the virus type can be difficult.
While some doctors hesitate to test for herpes without symptoms due to the stigma associated with the virus, it is important to note that asymptomatic individuals can still transmit the infection. If you have concerns, you can get a private blood test at our clinic for accurate results.

Hepatitis B

A blood test can determine:

• Past infections – If you’ve previously had the virus.
• Current infections – If you are currently infected.

Early detection is essential for managing Hepatitis B effectively.

Syphilis

Blood tests can detect both active and past syphilis infections. In some cases, multiple blood tests may be required for confirmation.

When Blood and Urine Tests Are Not Enough

If a blood or urine test does not provide a definitive diagnosis, a doctor may use:

• Microscopic or visual examination of sores
• Bacterial culture tests (e.g., for herpes sores)

These methods can be performed alone or alongside blood tests for greater accuracy, especially if testing occurs early in an outbreak.

Swab Testing & Self-Collection Options

In cases where a swab test is necessary, some doctors prefer to collect the sample themselves to ensure accuracy. However, self-swab testing is an option if you feel uncomfortable with the procedure or have a history of sexual trauma. Taking a self-swab test is better than avoiding testing altogether.

Private Blood Testing in London

If you have symptoms or believe you need an STD blood test, visit our clinic in London for fast, private, and reliable testing. Early detection is the key to effective treatment and peace of mind.