Toxoplasma Antibody (IgM)

Message

NOTE: This test should only be ordered on patients who have already had Toxoplasma IgG testing performed, and whose immune status is known. If acute infection is suspected, the specimens should be tested for the presence of both IgG and IgM antibodies. The result of any one Toxoplasma IgM test should not be used as the sole determinant of recent Toxoplasma infection.

SRHC Clients:

1 gold top tube or 1 red top tube (no gel)
Transport to SRHC laboratory within 8 hours

Test Code

LAB659

Quest Code

37207

CPT Codes
86778

Preferred Specimen

1 mL serum

Minimum Volume

0.5 mL

Transport Container

Plastic screw-cap vial

Transport Temperature

Room temperature

Specimen Stability

Room temperature: 4 days
Refrigerated: 7 days
Frozen: 30 days

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Gross hemolysis • Grossly lipemic

Methodology
Immunoassay (IA)

Setup Schedule

Set up: Mon, Wed, Fri; Report available: 1-4 days

Reference Range

AU/mL	Interpretation
<8.00	Negative
8.00-9.99	Equivocal
>9.99	Positive

Clinical Significance

T. gondii IgM is typically detected within a few days of infection, peaks within a few weeks, and usually falls to undetectable levels within a few months. In some patients, however, T. gondii IgM persists for more than a year; Thus, detection of T. gondii IgM does not necessarily indicate recent or ongoing toxoplasmosis.

Performing Laboratory
Quest Diagnostics Nichols Institute
14225 Newbrook Drive
Chantilly, VA 20153

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.