Chlamydia trachomatis and Neisseria gonorrhoeae DNA by PCR (Serum/Plasma)

How the Test Works

PCR (Polymerase Chain Reaction) is a highly sensitive technique that amplifies tiny amounts of genetic material from bacteria. In this test, your blood sample is analyzed to detect DNA fragments from Chlamydia trachomatis and Neisseria gonorrhoeae, which are responsible for common STIs. The test does not measure bacterial presence directly but identifies their genetic material, which can indicate infection.

Sample Collection and Preparation

A blood sample is drawn from your arm, similar to other blood tests. The sample is processed to separate plasma or serum, which is then tested for bacterial DNA. This method avoids the need for invasive procedures like urine or swab samples.

When This Test Might Be Ordered

Your healthcare provider may recommend this test if you have symptoms like unusual discharge, pain during urination, or if you’re at higher risk for STIs due to sexual history, recent exposure, or other health concerns. It’s also used as part of routine screening for sexually active individuals.

Limitations and Considerations

While PCR is highly sensitive, it may detect genetic material from bacteria that have already been cleared by the body or from past infections. False negatives can occur if the infection is very recent or if the sample is not representative. This test does not replace other diagnostic methods like culture or antibody testing.