An Autopsy Is Performed on an 8-Month-Old Infant After His

An autopsy is performed on an 8-month-old infant after his unexpected death.  Prior to death, the patient had a 1-month history of poor feeding and intermittent fever, which progressed to severe lethargy and coma.  The infant was adopted soon after birth, and there is limited information about his family history beyond documentation of an uncomplicated pregnancy and delivery at term gestation.  Brain biopsy reveals leptomeningeal inflammation and is positive for Enterovirus by PCR.  This patient would have been most likely to have which of the following laboratory findings?

A) Abnormal dihydrorhodamine test
B) Absent peripheral neutrophils
C) Absent tissue eosinophils
D) Decreased total hemolytic complement
E) Low circulating B lymphocyte count
F) Reduced serum IgG2 immunoglobulin levels

Correct Answer:

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