A 5-Year-Old Patient Is Suspected of Having Infectious Mononucleosis

question 12

Multiple Choice

A 5-year-old patient is suspected of having infectious mononucleosis.The patient's blood smear reveals 55% reactive lymphocytes along with a WBC count of 15 x 10⁹/L.The heterophile antibody test is negative.IgG and IgM antibodies to EBV both come back positive.What is the best explanation for these results?

• A)50% of children under the age of 10 do not have a positive heterophile test when infected with EBV.
• B)The patient does not have EBV but rather acute lymphoid leukemia.
• C)The serologic tests are false positive for IgG and IgM antibodies to EBV.
• D)The heterophile test is never positive in children under 10 years of age.

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