Chancroid is caused by Haemophilus ducreyi and presents with which finding?

• A. Chancroid
• B. Syphilis
• C. HSV infection
• D. Lymphogranuloma venereum

Answer: (A)

Haemophilus ducreyi infection causes chancroid, which presents most characteristically with a painful genital ulcer (soft chancre) and tender inguinal lymphadenopathy that can suppurate. The ulcer tends to be shallow, with ragged edges and a friable base, and the surrounding area is often inflamed and painful.

This contrasts with other sexually transmitted infections: syphilis typically shows a painless, hard chancre; HSV causes painful vesicular or ulcerative lesions; lymphogranuloma venereum often starts with a small, sometimes unnoticed lesion followed by painful inguinal lymphadenopathy.