Chlamydia Trachomatis (Swab)
Does this test have other names?
C. trachomatis test, CZ test, chlamydia test
What is this test?
This test looks for Chlamydia trachomatis bacteria in a sample of cells collected
by your healthcare provider.
C. trachomatis bacteria cause chlamydia. Chlamydia is the most common sexually transmitted
disease (STD) in the U.S.
The CDC recommends that sexually active women 25 and younger be screened once a year
for chlamydia. That's because as many as half of women who get chlamydia don't have
any symptoms. Men should be tested as soon as they have symptoms or if their partners
are diagnosed with chlamydia.
In women, chlamydia may lead to cervicitis, an inflammation and swelling of the cervix.
If it isn't treated, it can lead to serious sexual health problems, including infertility.
In men, chlamydia can cause urethritis. This is a swelling of the urethra and possibly
blood in the urine. Babies born to infected mothers can get pneumonia or conjunctivitis.
The mothers can get endometriosis later on.
Chlamydia can be treated with antibiotics.
Why do I need this test?
You may have this test if you are a sexually active woman 25 or younger or a man whose
partner has been diagnosed with chlamydia.
When symptoms occur in women, they can include:
When symptoms occur in men, they can include:
What other tests might I have along with this test?
Your healthcare provider may also order other tests because chlamydia symptoms can
be confused with symptoms of other STDs. These STDs include:
What do my test results mean?
Many things may affect your lab test results. These include the method each lab uses
to do the test. Even if your test results are different from the normal value, you
may not have a problem. To learn what the results mean for you, talk with your healthcare
Normal results are negative, meaning that no chlamydia cells were found in your sample.
A positive result means that chlamydia bacteria were found and that you are likely
infected with the disease.
How is this test done?
This test requires a sample of cells from the urethra in men or the vagina in women.
For men, the healthcare provider will gently insert a swab 3 to 4 centimeters into
the urethra. The provider will turn it once to collect cells. For women, the provider
will put the swab into the vagina to take cells from the cervix.
Does this test pose any risks?
This test poses no known risks. But it can be mildly uncomfortable because the areas
around the urethra and cervix are sensitive.
What might affect my test results?
Other factors aren't likely to affect your results.
How do I get ready for this test?
You don't need to prepare for this test.