An infection of the
genital tract (in both men and women) caused by a bacterium (Chlamydia
trachomatis).
In men, chlamydia may
produce a urethritis (infection of the urethra, the urinary canal leading
from the bladder to exit at the tip of the penis). A discharge from the
penis may be present but many infections have no symptoms. Occasionally,
infection may spread to the epididymis (storage tubes for sperm overlying
the testes in the testicles).
In women, the cervix
(opening of the uterus at the top of the vagina) becomes infected and most
infections do not produce symptoms. From the cervix, the infection may
spread to the fallopian tubes (tubes leading from the ovary to the uterus)
causing pelvic inflammatory disease (PID). Pelvic inflammatory disease due
to chlamydia is often without symptoms but if untreated, may lead to
scarring of the fallopian tubes and ectopic (tubal) pregnancy or eventual
infertility.
Chlamydia trachomatis
can cause conjunctivitis (inflammation of the lining of the eyelids and eye)
in adults. Babies born to infected mothers can become infected as they pass
through the infected cervix and may develop conjunctivitis or pneumonia
caused by chlamydia soon after birth.
Chlamydia infection is
diagnosed by examination and culture of a sample of cervical or urethral
discharge.
Adult chlamydia
infection is a sexually transmitted disease. Babies may be infected as they
pass through an infected cervix at birth.