Haemophilus ducreyi

Definition

Haemophilus ducreyi is a gram-negative coccobacillus bacterium that causes the sexually transmitted infection known as chancroid. It primarily results in painful genital ulcers and can increase the risk of HIV transmission.

5 Must Know Facts For Your Next Test

1. Haemophilus ducreyi is the causative agent of chancroid, characterized by painful genital ulcers.
2. Chancroid primarily affects individuals in developing countries but can occur worldwide.
3. The bacterium is transmitted through sexual contact involving skin abrasions or mucosal surfaces.
4. Diagnosis typically involves clinical examination and culture of ulcer exudate on selective media.
5. Effective treatments include antibiotics such as azithromycin, ceftriaxone, or ciprofloxacin.

Review Questions

• What type of infection does Haemophilus ducreyi cause?
• How is Haemophilus ducreyi typically diagnosed?
• Name two antibiotics effective in treating infections caused by Haemophilus ducreyi.

Related terms

Chancroid: A sexually transmitted infection characterized by painful genital ulcers caused by Haemophilus ducreyi.

Gram-Negative Bacteria: A group of bacteria that do not retain the crystal violet stain used in Gram staining; they have a thin peptidoglycan layer.

Azithromycin: An antibiotic commonly used to treat various bacterial infections, including those caused by Haemophilus ducreyi.