Diagnostic Highlights

Test

Normal Result

Abnormality with Condition

Explanation

Enzyme-linked immunosorbent assay (ELISA)

Negative

Pinpoints specific toxoplasmosis antibody (IgG and IgM)

Identify presence of antibodies to parasitic infection

Serum toxoplasmo-sis antibody assay

IgM titer < 1:64

IgM titer increased

Identify presence of antibodies to parasitic infection

Immunofluores-cence

IgG titer < 1:1024

IgG titer increased

Identify presence of antibodies to parasitic infection

Tissue and fluid cultures; fluids are cerebrospinal fluid, lymph node aspirate

Negative for T. gondii

Positive for T. gondii

Identify presence of parasitic infection

Other Tests: Serum globulin (increased), complete blood count, lymph node biopsy, brain biopsy, computed tomography (CT) scan of the brain, magnetic resonance imaging (MRI) of the brain, tests for hemagglutination (Sabin-Feldman dye test)

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