Chancroid (Haemophilus ducreyi)
1990 Case Definition
Clinical description
A sexually transmitted disease characterized by
painful genital ulceration and inflammatory inguinal adenopathy.
The disease is caused by infection with Haemophilus ducreyi.
Laboratory criteria for diagnosis
Case classification
Probable: a clinically
compatible case with one or more painful genital ulcers and both
a) no evidence of Treponema pallidum infection by darkfield
examination of ulcer exudate or by a serologic test for syphilis
performed at least 7 days after onset of ulcers, and b) the clinical
presentation of the ulcer(s) is not typical of disease caused
by herpes simplex virus (HSV), or HSV culture is negative
Confirmed: a case that is laboratory confirmed
See also:
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