Chlamydia: Meaning, Symptoms, Testing, Treatment, and Prevention

A person can get chlamydia through vaginal, anal, or oral sex with someone who has the infection. It can also pass from a pregnant person to a baby during childbirth.

Here are some simple examples of the word in use:

• Chlamydia is an STI that can affect people of different sexes.
• A person may have chlamydia without feeling ill.
• Chlamydia can be found through a urine or swab test.
• Antibiotics can cure chlamydia when taken correctly.
• Untreated chlamydia may damage the reproductive system.

Having chlamydia is not evidence that someone is dirty, irresponsible, or unfaithful. It is a health condition that requires testing, treatment, and respectful communication.

• She was tested for chlamydia.
• His chlamydia test was positive.
• Chlamydia can occur without symptoms.
• The clinic provides chlamydia testing.

English learners should normally avoid saying a chlamydia.

Correct forms include:

• She has chlamydia.
• He was diagnosed with a chlamydial infection.
• They received treatment for chlamydia.

Less natural:

• She has a chlamydia.

The adjective chlamydial is more common in medical language:

• chlamydial infection;
• chlamydial cervicitis;
• chlamydial screening;
• chlamydial complications.

Transmission may occur through:

• vaginal sex;
• anal sex;
• oral sex;
• shared sexual devices that are not cleaned or covered;
• childbirth from an infected parent to a baby.

A penis does not need to ejaculate for chlamydia transmission to occur.

Chlamydia is not normally spread through ordinary social contact such as hugging, sharing food, or sitting near someone.

Possible symptoms involving the cervix or vagina include:

• unusual vaginal discharge;
• burning during urination;
• bleeding between periods;
• bleeding after sex;
• pain during sex;
• lower abdominal or pelvic pain.

Possible symptoms involving the penis or urethra include:

• discharge from the penis;
• burning during urination;
• pain or swelling in a testicle;
• irritation around the urethral opening.

Rectal chlamydia may cause pain, discharge, or bleeding, although it may also cause no symptoms.

Testing may use:

• a urine sample;
• a vaginal swab;
• a cervical swab;
• a rectal swab;
• a throat swab when appropriate.

The test site should reflect the body areas involved in sexual contact. For example, a urine test may not detect an infection located only in the throat or rectum.

Self-collected vaginal swabs and some other approved self-collection methods may be available, depending on the healthcare system and location.

A person should:

• take the medicine exactly as directed;
• complete the full treatment;
• avoid sharing antibiotics;
• tell recent sexual partners;
• follow instructions about when sexual activity may resume;
• return for further testing when advised.

CDC guidance advises avoiding sexual intercourse until the recommended treatment period has passed and sexual partners have also been treated. This helps prevent transmission and reinfection.

Reinfection often happens when:

• a sexual partner remains untreated;
• sex resumes too soon;
• a new exposure occurs;
• treatment instructions are not completed.

Recent sexual partners may need testing and treatment even when they have no symptoms.

CDC guidance recommends retesting approximately three months after treatment because repeat infection is common.

Possible consequences include:

• long-term pelvic pain;
• scarring of the fallopian tubes;
• difficulty becoming pregnant;
• increased risk of ectopic pregnancy.

Chlamydia may also contribute to inflammation near the testicles, sometimes causing pain or swelling. Less commonly, infection may be associated with reactive arthritis affecting the joints.

Early diagnosis and treatment reduce the risk of complications.

An untreated infection may pass to a baby during childbirth and can cause eye infection or pneumonia in the newborn.

Pregnant patients diagnosed with chlamydia may need a follow-up test to confirm that treatment worked, followed by additional retesting as advised.

• using external or internal condoms correctly;
• using barriers during sexual contact;
• covering shared sexual devices with a new condom;
• cleaning devices between users;
• obtaining STI testing based on personal risk;
• reducing overlapping sexual partnerships;
• discussing testing with partners;
• completing treatment before resuming sex.

Condoms reduce the risk of many sexually transmitted infections when used correctly and consistently, although no prevention method removes every possible risk.

• “My test showed that I have chlamydia.”
• “Chlamydia often has no symptoms, so you should be tested.”
• “I am receiving treatment for chlamydia.”
• “We should wait until treatment is complete before having sex.”
• “Having chlamydia does not show when or from whom the infection came.”

A diagnosis does not always prove that a current partner recently transmitted the infection. Chlamydia may remain unnoticed because symptoms are often absent.

A person can identify chlamydia by looking at a partner.
Chlamydia requires appropriate testing.

Chlamydia is caused by poor hygiene.
It is caused by bacterial transmission, usually during sexual contact.

Chlamydia affects only women.
People of different sexes can acquire and transmit chlamydia.

Antibiotics provide permanent protection.
Treatment cures the current infection, but chlamydia can be acquired again.

A positive chlamydia test always proves recent infidelity.
The infection may have been present without symptoms, so timing cannot always be determined from one test.

1. Chlamydia is a common bacterial sexually transmitted infection.
2. A person can have chlamydia without noticing any symptoms.
3. She requested a chlamydia test during her health appointment.
4. His urine test showed that he had chlamydia.
5. Chlamydia can infect the genitals, rectum, or throat.
6. Antibiotics can cure chlamydia when the treatment is completed correctly.
7. Untreated chlamydia may cause reproductive-health complications.
8. They avoided sexual contact until their chlamydia treatment was complete.
9. A previous chlamydia infection does not prevent reinfection.
10. Talking openly about chlamydia can help partners obtain testing and treatment.

The infection also demonstrates why symptoms alone cannot determine sexual-health status. Testing may be important even when a person feels healthy.

A responsible response to chlamydia includes avoiding shame, obtaining professional testing and treatment, informing affected partners, following guidance before resuming sexual activity, and using suitable safer-sex practices to reduce future transmission.