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What Is Chlamydia?

Chlamydia is a bacterial infection of your genital tract that spreads easily through sexual contact. You may not know you have chlamydia at first because the symptoms of pain and fluid discharge don't show up right away. Most of the time, there are no symptoms whatsoever. The disease isn't difficult to treat. However, left untreated, chlamydia can lead to a number of more serious health problems.

The condition is the most common bacterial sexually transmitted disease (STD) in the United States. Each year, an estimated 3 million chlamydia cases occur.

You can get the Chlamydia trachomatis bacterium, which causes chlamydia, whether you're a man or a woman. The disease affects all age groups, but is most prevalent among U.S. teenagers.

Men's Health Center
Women's Health Center

Signs and Symptoms

Chlamydia is difficult to detect because early-stage infections often cause few or no symptoms that might alert you to see your doctor. About 75 percent of women and 50 percent of men don't have symptoms. Symptoms may occur 1 to 3 weeks after exposure to chlamydia. If symptoms do occur, they're often mild and transient. As a result, you may overlook them.

Signs and symptoms of chlamydia infection may include:
Causes

The bacterium Chlamydia trachomatis causes chlamydia. The condition spreads most commonly through sexual intercourse and other intimate contact between genitals, rectal area and mouth. It's also possible for a mother to spread chlamydia from her vaginal canal to her child during delivery, causing pneumonia or an eye infection, which may lead to blindness.

When to Seek Medical Advice

See your doctor if you have a discharge from your vagina or penis, have pain during urination or encounter other signs and symptoms of chlamydia. It's important to treat chlamydia before it leads to other health problems. Also, see your doctor if your sexual partner reveals that he or she has chlamydia, even if you have no symptoms. Symptoms may not occur until several weeks after infection, or may not occur at all.

Screening and Diagnosis

Because of the chance of other health problems if you contract chlamydia, ask your doctor about how often you should have chlamydia screening tests if you're at risk. You're in a high-risk group if you have: Screening and diagnosis of chlamydia is relatively easy. Tests include:
Men's screening tests: What, why and how often?
Women's screening tests: What, why and how often?
Pap smear: Simple, lifesaving test

Complications

Left untreated, chlamydia can lead to other health problems.
Chronic pelvic pain: Puzzling, frustrating condition

Treatment

Doctors treat chlamydia by prescribing antibiotics such as azithromycin (Zithromax), erythromycin, tetracycline or doxycycline. The infection should disappear within 1 to 2 weeks. Your sexual partner or partners also must receive treatment even though they may not have symptoms. Otherwise, the infection will be passed back and forth. Failure to treat chlamydia can result in complications in women and men.

Prevention

The surest way to prevent a chlamydia infection is to abstain from sexual intercourse. Short of that, you can:
Condoms: A users' guide

July 24, 2001