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Test Code TXPM Toxoplasma gondii Antibody, IgM, 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: 0.7 mL

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


Useful For

Qualitative detection of IgM antibodies to Toxoplasma gondii in serum

Method Name

Electrochemiluminescence Immunoassay (ECLIA)

Reporting Name

Toxoplasma Ab, IgM, S

Specimen Type

Serum

Specimen Minimum Volume

0.7 mL

Specimen Stability Information

Specimen Type Temperature Time
Serum Refrigerated (preferred) 21 days
  Frozen  90 days
  Ambient  72 hours

Reject Due To

Gross hemolysis Reject
Gross lipemia Reject
Gross icterus Reject
Additives (eg, biocides, antioxidants) Reject

Reference Values

Negative

Reference values apply to all ages.

Interpretation

Negative:

No IgM to Toxoplasma gondii detected. False negative results may occur in immunocompromised patients or if testing performed within 1 to 2 weeks of initial exposure and repeat testing may be helpful.

A single negative result should not be used to rule-out toxoplasmosis, and repeat testing is recommended for patients at high risk for infection.

 

Borderline:

Repeat testing on a new sample collected in 2 to 3 weeks is recommended to assess for seroconversion. Further confirmatory testing may be necessary at a Toxoplasma reference laboratory in borderline results persist following repeat testing.

 

Positive:

Toxoplasma gondii IgM antibodies detected. Specimens with positive results should be confirmed by a laboratory with expertise in the diagnosis of toxoplasmosis.

For confirmation of toxoplasmosis, the US Food and Drug Administration issued a Public Health Advisory (07/25/1997) that recommends sera found to be positive for Toxoplasma gondii IgM antibodies should be sent to a Toxoplasma reference laboratory.

Day(s) Performed

Monday through Saturday

Report Available

Same day/1 to 3 days

Performing Laboratory

Mayo Clinic Laboratories in Rochester

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.

CPT Code Information

86778

LOINC Code Information

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

 

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