Viral Infections · Pathology

What is the primary target cell for the Epstein-Barr Virus (EBV) when causing Infectious Mononucleosis?

  1. CD4+ helper T-lymphocytes
  2. B-lymphocytes via the CD21 receptor
  3. Squamous epithelial cells of the cervix
  4. Vascular endothelial cells
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Correct answer: B-lymphocytes via the CD21 receptor

EBV infects B-cells by binding to the CD21 (CR2) complement receptor. This infection leads to B-cell proliferation, which in turn triggers a massive response of atypical CD8+ T-cells seen in the peripheral blood.

Difficulty: Medium Question 4 of 20

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