Question

What is the most likely causative agent of this condition (oral hairy leukoplakia)?

• A. Candida
• B. Cytomegalovirus
• C. Epstein-Barr Virus
• D. Human Papillomavirus

Hint:

Oral hairy leukoplakia → Lateral border of tongue → Immunocompromised patient → Epstein-Barr Virus (EBV).

Answer 1

The Correct Option is C

Oral hairy leukoplakia is a condition that is commonly associated with immunocompromised individuals, particularly those with HIV infection. The causative agent of oral hairy leukoplakia is the Epstein-Barr Virus (EBV). Here is the reasoning for identifying EBV as the most likely causative agent, and why the other options are less likely:

1. Understanding Oral Hairy Leukoplakia:
   • It is characterized by white patches on the lateral borders of the tongue.
   • These patches have a distinctive "hairy" appearance.
   • The condition is indicative of underlying immunosuppression.
2. Role of Epstein-Barr Virus:
   • EBV is a member of the herpesvirus family and is known to cause latent infections in B cells.
   • In the context of immunosuppression, EBV can reactivate and lead to oral hairy leukoplakia.
   • Notably, EBV is commonly associated with this specific oral lesion in HIV-positive patients.
3. Ruling Out Other Options:
   • Candida: Causes oral thrush, which is a different type of lesion characterized by white, curd-like plaques that can be wiped off.
   • Cytomegalovirus: While it can cause oral lesions, they are usually in the form of ulcers rather than leukoplakic patches.
   • Human Papillomavirus: Typically associated with papillomas or warts in the oral cavity, not hairy leukoplakia.

Based on these points, the most likely causative agent of oral hairy leukoplakia is the Epstein-Barr Virus (EBV). The characteristic appearance of the lesions and the association with immunocompromised states like HIV infection further support EBV as the correct answer.