KROK 1 2021 – Question 63 · KROK (Medicine) · Microbiology, Virology, and Immunology

A 17-year-old girl is undergoing an examination. She has signs of pharyngitis, lymphadenopathy of the neck, and fever and was provisionally diagnosed with infectious mononucleosis. What test can confirm this diagnosis at the onset of the disease?

  1. A. Microscopy of blood smear using Romanovsky-Giemsa method
  2. B. Measuring the IgG to Epstein-Barr virus
  3. C. Measuring the levels of C-reactive protein
  4. D. Measuring the antibodies (IgM) to Epstein-Barr virus
  5. E. Sabin-Feldman dye test
Hint

Think about the timing of the antibody response in a primary viral infection and which serological marker is informative at the very onset of symptoms, rather than later or only retrospectively.

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