Haemophilus ducreyi

General:

Clinical: Sexually transmitted, producing a painful genital soft chancre/ulcer, which can potentially be confused with syphilis or herpes.

• Normal:
• Abnormal: Genital soft chancre.

Resistance:

Morphology: Small Gram- rod which tends to arrange in "schools of fish" formation on smears, and is characteristic enough for presumptive identification.

Growth characteristics: Difficult to grow even on chocolate agar enriched with hemin and NAD.

Common/important pathogens: