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7821 Microbiology

An AIDS patient complains of headaches and disorientation. A clinical diagnosis of Toxoplasma encephalitis is made and Toxoplasma cysts were observed in a brain section. Which one of the following antibody results would be most likely in this patient?

AIgM nonreactive, IgG nonreactive
BIgM nonreactive, IgG reactive (low titre) (Correct Answer)
CIgM reactive (low titer), IgG reactive (high titer)
DIgM reactive (high titer), IgG reactive (high titer)