Toxoplasma gondii Antibody, IgM

Casandra

Casandra Test Code AR27823Version 1 (DRAFT)

Performing Lab

Lab ARUP LaboratoriesLab Test ID 0050557CPT Code 86778

Toxoplasma gondii Antibody, IgM

Also known as: TOXEIGM

Clinical Use

Order Test

Use

The Toxoplasma gondii Antibody, IgM test detects the presence of IgM antibodies to T. gondii. It is used for the diagnosis of acute or recent infection with Toxoplasma gondii. Detection of IgM antibodies may indicate a current or recent infection but low levels can persist for more than 12 months post-infection. It is important for evaluating immune response, particularly in pregnant patients, as a part of prenatal screening. Retesting in parallel with a subsequent sample may be necessary for indeterminate or positive results.

Special Instructions

Any indeterminate or detected Toxoplasma gondii IgM result should be retested with another serum sample collected 1-3 weeks later for confirmation. Further confirmation might require a different IgM ELISA test from another reference lab specializing in toxoplasmosis. The test is not to be used for blood donor screening or for screening human cell, tissue, and tissue-based products.

Limitations

This test should not be used alone to determine infection status due to the persistence of IgM antibodies for more than 12 months post-infection. It should not be used for blood donor screening or screening human cell, tissues, and cellular-based products. False positives/negatives may occur, hence it should be interpreted in the context of clinical findings and other diagnostic results.

Test Details

New York Approved

Methodology

Immunoassay (CLIA)

Biomarkers

Toxoplasma gondii IgM

Antibody

IgM Level • Concentration / Level • Quantitative (Continuous) (e.g., copies/mL, % expression)

LOINC Codes

Result Codes

8040-8

Result Turnaround Time

0-1 days

Specimen

Serum

Volume

1 mL

Minimum Volume

0.5 mL

Container

Serum separator tube (SST)

Collection Instructions

Allow specimen to clot completely at room temperature. Separate serum from cells ASAP or within 2 hours of collection and transfer to an ARUP standard transport tube.