Chancroid is a sexually acquired disease caused by Haemophilus ducreyi. The infection is characterized by one or more genital ulcers, which are soft and painful, and regional lymphadenitis which may develop into buboes. The infection may easily be misidentified due to its rare occurrence in Europe and difficulties in detecting the causative pathogen. H. ducreyi is difficult to culture. Polymerase chain reaction (PCR) can demonstrate the bacterium in suspected cases. Antibiotics will usually be efficient for curing chancroid.
Kemp, M., Christensen, J. J., Lautenschlager, S., Vall-Mayans, M., & Moi, H. (2011). European guideline for the management of chancroid, 2011. International Journal of S T D & AIDS, 22(5), 241-244. https://doi.org/10.1258/ijsa.2010.010432