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Test Code TXM Toxoplasma gondii Antibody, IgM, Serum

Important Note

Order GO23910 Generic Orderable/Misc Test

Secondary ID

39856

Useful For

Detecting recent infection with Toxoplasma gondii

Method Name

Multiplex Flow Immunoassay (MFI)

Reporting Name

Toxoplasma Ab, IgM, S

Specimen Type

Serum


Specimen Required


Supplies: Sarstedt Aliquot Tube, 5 mL (T914)

Collection Container/Tube:

Preferred: Serum gel

Acceptable: Red top

Submission Container/Tube: Plastic vial

Specimen Volume: 1 mL

Collection Instructions: Centrifuge and aliquot serum into a plastic vial.


Specimen Minimum Volume

0.8 mL

Specimen Stability Information

Specimen Type Temperature Time
Serum Refrigerated (preferred) 14 days
  Frozen  14 days

Reject Due To

Gross hemolysis Reject
Gross lipemia Reject
Heat-inactivated specimen Reject

Reference Values

Negative

Reference values apply to all ages.

Cautions

Diagnosis of recent infection by Toxoplasma gondii can only be established on the basis of a combination of clinical and serological data.

 

The result of a single serum sample does not constitute sufficient proof for diagnosis of recent infection.

 

If a serum specimen was collected too soon after infection, IgM antibodies to Toxoplasma gondii may be absent. If this is suspected, a second serum specimen should be collected 2 to 3 weeks later, and the test repeated.

 

Results should be interpreted with caution in patients who are either HIV-positive, receiving immunosuppressive therapy, or have other disorders leading to immunosuppression.

 

Heterophile antibodies in the patient specimens may interfere with the assay performance.

 

The performance of the assay has not been established for cord blood testing.

 

As with any low prevalence analyte, there is the increased possibility that a positive result may actually be false, reducing the assay's positive predictive value. Per the Public Health Advisory (7/25/1997), the US Food and Drug Administration suggests that sera found to be positive for Toxoplasma gondii IgM antibodies should be submitted to a Toxoplasma reference laboratory.

Day(s) Performed

Monday through Friday

Report Available

Same day/1 to 3 days

Performing Laboratory

Mayo Clinic Laboratories in Rochester

CPT Code Information

86778

LOINC Code Information

Test ID Test Order Name Order LOINC Value
TXM Toxoplasma Ab, IgM, S 40678-5

 

Result ID Test Result Name Result LOINC Value
TXM Toxoplasma Ab, IgM, S 40678-5

NY State Approved

Yes

Test Classification

This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.

Forms

If not ordering electronically, complete, print, and send Infectious Disease Serology Test Request (T916) with the specimen.