Diagnosis

The Centers for Disease Control and Prevention recommends chlamydia screening for:

  • Sexually active women age 25 or younger. The rate of chlamydia infection is highest in this group, so a yearly screening test is recommended. Even if you've been tested in the past year, get tested when you have a new sex partner.
  • Pregnant women. You should be tested for chlamydia during your first prenatal exam. If you have a high risk of infection — from changing sex partners or because your regular partner might be infected — get tested again later in your pregnancy.
  • Women and men at high risk. People who have multiple sex partners, who don't always use a condom or men who have sex with men should consider frequent chlamydia screening. Other markers of high risk are current infection with another sexually transmitted infection and possible exposure to an STI through an infected partner.

Screening and diagnosis of chlamydia is relatively simple. Tests include:

  • A urine test. A sample of your urine is analyzed in the laboratory for presence of this infection.
  • A swab. For women, your doctor takes a swab of the discharge from your cervix for culture or antigen testing for chlamydia. This can be done during a routine Pap test. Some women prefer to swab their vaginas themselves, which has been shown to be as diagnostic as doctor-obtained swabs.

    For men, your doctor inserts a slim swab into the end of your penis to get a sample from the urethra. In some cases, your doctor will swab the anus.

If you've been treated for an initial chlamydia infection, you should be retested in about three months.

More Information

Treatment

Chlamydia trachomatis is treated with antibiotics. You might receive a one-time dose, or you might need to take the medication daily or multiple times a day for five to 10 days.

In most cases, the infection resolves within one to two weeks. During that time, you should abstain from sex. Your sexual partner or partners also need treatment even if they have no signs or symptoms. Otherwise, the infection can be passed back and forth between sexual partners.

Having chlamydia or having been treated for it in the past doesn't prevent you from getting it again.

Clinical trials

Explore Mayo Clinic studies testing new treatments, interventions and tests as a means to prevent, detect, treat or manage this disease.

Preparing for your appointment

If you think you have a sexually transmitted infection, such as Chlamydia trachomatis, see your family doctor.

What you can do

Before your appointment, prepare to answer the following questions:

  • When did your symptoms begin?
  • Does anything make them better or worse?
  • What medications and supplements do you take regularly?

You also might want to prepare a list of questions to ask your doctor. Sample questions include:

  • Should I be tested for other sexually transmitted infections?
  • Should my partner be tested or treated for chlamydia infection?
  • Should I avoid sex during treatment? How long should I wait?
  • How can I prevent chlamydia infection in the future?

What to expect from your doctor

Your doctor is likely to ask you a number of questions, such as:

  • Do you have a new sexual partner or multiple partners?
  • Do you use condoms consistently?
  • Do you have pelvic pain?
  • Do you have pain while urinating?
  • Do you have sores or unusual discharge?
Feb. 20, 2020
  1. WHO guidelines for the treatment of Chlamydia trachomatis. World Health Organization. https://www.who.int/reproductivehealth/publications/rtis/chlamydia-treatment-guidelines/en/. Accessed Jan. 13, 2020.
  2. Cohen J, et al., eds. Chlamydia trachomatis infection. In: Infectious Diseases. 4th ed. Elsevier; 2017. https://www.clinicalkey.com. Accessed Jan. 13, 2020.
  3. AskMayoExpert. Chlamydia, gonorrhea, and nongonococcal urethritis. Mayo Clinic; 2019.
  4. Chlamydia: CDC fact sheet (detailed). Centers for Disease Control and Prevention. https://www.cdc.gov/std/chlamydia/stdfact-chlamydia-detailed.htm. Accessed Jan. 4, 2020.

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