Skip to page content  Chlamydia Fact Sheet  What is chlamydia?
Chlamydia is a common bacterial infection that is sexually
transmitted and often causes no symptoms. If not treated,
chlamydia can damage reproductive organs and make it difficult
for a woman to have a baby. Women age 25 and under who are
sexually active should be tested for chlamydia at least once a
year.  How do people get chlamydia?  People can get chlamydia
through vaginal and anal sex. While less likely, it's also
possible to get the disease through oral sex. A pregnant women
can also give chlamydia to her baby.  Chlamydia is not passed
through casual contact (like shaking hands) or toilet seats.
How common is chlamydia?  Over 1 million cases of chlamydia are
reported in the U.S. each year, more than any other STD. Most
cases are never reported, though, and experts think the actual
number is closer to 3 million.  Download pdf, (120 kb)  What are
the symptoms?  Symptoms can start within a few weeks after
exposure to chlamydia, and may be min