Microbiology Questions-2

 A 10-year-old boy has a bacterial pneumonia.
The etiologic agent had M type-1 protein and
grew on blood agar. The patient’s immune
system appeared incapable of controlling the
infection. Adecrease in which of the following
is most directly related to the immunological
failure?
(A) antibody activity
(B) cytotoxic T-cell function
(C) IL-4 and IL-10 levels
(D) mast cell degranulation
(E) platelet aggregation

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