How is the infection diagnosed?
Diagnosis of chancroid begins with a medical history and physical
exam. The Centers for Disease Control (CDC) gives three criteria for a
diagnosis of chancroid.
The person has one or more painful ulcers, which may be associated with
swollen lymph nodes.
Treponema pallidum\ bacteria. Less often, syphilis is transmitted from a pregnant woman to her baby. This form of syphilis is known as \congenital syphilis.\ ',CAPTION,'Syphilis');" onmouseout="return nd();">Syphilis has been ruled
out with diagnostic tests.
The person's symptoms are not typical of genital herpes, or a culture for the herpes virus is
negative.The Haemophilus ducreyi
bacteria that cause chancroid can only be grown on a special culture medium.
That medium is not always available, and the test is only 80% sensitive for the
bacteria.