Chlamydia Infections

What is chlamydia?

From: MedlinePlus, National Library of Medicine

Chlamydia is a common sexually transmitted infection (STI). It is caused by bacteria called Chlamydia trachomatis. Anyone can get chlamydia. It often doesn't cause symptoms, so people may not know that they have it. Antibiotics can cure it. But if it's not treated, chlamydia can cause serious health problems.

How is chlamydia spread?

From: MedlinePlus, National Library of Medicine

You can get chlamydia during oral, vaginal, or anal sex with someone who has chlamydia. Chlamydia can also be passed to the baby during childbirth.

If you've had chlamydia and were treated in the past, you can get re-infected if you have unprotected sex with someone who has it.

Who is more likely to get chlamydia?

From: MedlinePlus, National Library of Medicine

Chlamydia is more common in young people, especially young women. You are more likely to get infected with chlamydia if you don't consistently use a condom or if you have multiple partners.

What are the symptoms of chlamydia?

From: MedlinePlus, National Library of Medicine

Chlamydia doesn't usually cause any symptoms. So you may not realize that you have it. But even if you don't have symptoms, you can still pass the infection to others.

If you do have symptoms, they may not appear until several weeks after you have sex with someone who has chlamydia.

Symptoms in women include:

If the infection spreads, you might get lower abdominal (belly) pain, pain during sex, nausea, and fever.

Symptoms in men include:

If the chlamydia infects the rectum (in men or women), it can cause rectal pain, discharge, and bleeding.

• Abnormal vaginal discharge, which may have a strong smell
• A burning sensation when urinating
• Discharge from your penis
• A burning sensation when urinating (peeing)
• Pain and swelling in one or both testicles (although this is less common)

How is chlamydia diagnosed?

From: MedlinePlus, National Library of Medicine

There are lab tests to diagnose chlamydia. Your health care provider may ask you to provide a urine sample. Or your provider may use (or ask you to use) a cotton swab to get a sample from your vagina to test for chlamydia.

Who should be tested for chlamydia?

From: MedlinePlus, National Library of Medicine

You should go to your provider for a test if you have symptoms of chlamydia or if you have a partner who has an STI. If you are pregnant, you should get a test when you go to your first prenatal visit.

People at higher risk should get checked for chlamydia every year:

• Sexually active women 25 and younger
• Older women who have new or multiple sex partners or a sex partner who has an STI
• Men who have sex with men (MSM)

What other problems can chlamydia cause?

From: MedlinePlus, National Library of Medicine

In women, an untreated infection can spread to your uterus and fallopian tubes, causing pelvic inflammatory disease (PID). PID can cause permanent damage to your reproductive system. This can lead to long-term pelvic pain, infertility, and ectopic pregnancy. Women who have had chlamydia infections more than once are at higher risk of serious reproductive health complications.

Men often don't have health problems from chlamydia. Sometimes it can infect the epididymis (the tube that carries sperm). This can cause pain, fever, and, rarely, infertility.

Both men and women can develop reactive arthritis because of a chlamydia infection. Reactive arthritis is a type of arthritis that happens as a "reaction" to an infection in the body.

Babies born to infected mothers can get eye infections and pneumonia from chlamydia. It may also make it more likely for your baby to be born too early.

Untreated chlamydia may also increase your chances of getting or giving HIV.

What are the treatments for chlamydia?

From: MedlinePlus, National Library of Medicine

Antibiotics will cure the infection. You may get a one-time dose of the antibiotics, or you may need to take medicine every day for 7 days. It is important to take all the medicine that your provider prescribed for you. Antibiotics cannot repair any permanent damage that the disease has caused.

To prevent spreading the disease to your partner, you should not have sex until the infection has cleared up. If you got a one-time dose of antibiotics, you should wait 7 days after taking the medicine to have sex again. If you have to take medicine every day for 7 days, you should not have sex again until you have finished taking all of the doses of your medicine.

It is common to get a repeat infection, so you need to get tested again about three months after treatment.

Can chlamydia be prevented?

From: MedlinePlus, National Library of Medicine

The only sure way to prevent chlamydia is to not have vaginal, anal, or oral sex.

Correct usage of latex condoms greatly reduces, but does not eliminate, the risk of catching or spreading chlamydia. If your or your partner is allergic to latex, you can use polyurethane condoms.

Which doctor should you see?

The suggested department for discussing Chlamydia Infections is Infectious Diseases, with a general physician / infectious disease specialist as the relevant type of clinician. General physician / Family Medicine; paediatrician for children. Referral depends on symptoms.

This is an editorial referral starting point. The appropriate clinic depends on the person’s age, symptoms, previous diagnosis and local services. The first clinician can decide whether another specialty or a team is needed; a department label does not confirm the diagnosis.

How to prepare for an assessment

Bring a short timeline of the main symptoms: when they first appeared, whether they are constant or episodic, what seems to change them, and how they affect daily activities. Include previous reports, discharge summaries, current medicines and supplements, allergies, and any relevant family history. A dated record is more useful than trying to match every feature in an online article.

Ask the clinician what is already established and what remains uncertain. If a test is suggested, ask what question it answers, what its limitations are and how the result would change the next step. The information here is not an instruction to arrange every possible test. In children, bring growth, developmental and school information if it is relevant to the concern.

• Which exposure or organism is suspected, and what evidence would confirm it?
• Are precautions, vaccination or advice for close contacts relevant to this infection?
• What should happen if symptoms worsen or do not improve as expected?

Treatment discussions and follow-up

Where the source describes treatments, these are an overview of possible care, not a prescription for an individual. Ask which option applies to the confirmed diagnosis, what benefit is expected, what adverse effects to watch for and how progress will be assessed. Availability, approvals and local practice can differ from the country described in the source.

Before leaving the appointment, clarify the next review date, who will communicate results, and whom to contact if the situation changes. Discuss difficulties with sleep, work, school, mobility, eating or emotional wellbeing when these are relevant. Practical support may require coordination between the treating clinician and other services.

The collected references do not establish a complete prevention or long-term outlook section for this entry. Missing information should not be interpreted as proof that prevention is impossible or that a particular outcome is inevitable. Ask what is known for the exact subtype, stage and personal circumstances, and which uncertainties remain.

When to seek emergency help

Severe breathing difficulty, collapse, new stroke-like symptoms, a seizure that is prolonged or repeated without recovery, uncontrolled major bleeding, or an immediate risk of self-harm require emergency help. In India, call 112 or reach the nearest emergency department. This is a general, non-exhaustive warning list; it is not a condition-specific triage tool.