Toxoplasma Antibodies (IgG, IgM)
Test Summary
Toxoplasmosis is a parasitic infection caused by the protozoan Toxoplasma gondii. Approximately 23% of the immunocompetent population are asymptomatic carriers of the parasite. The combination of high titers of IgG and IgM antibodies to Toxoplasma gondii is consistent with infection in the last three months. High titers of IgG and low to medium titers of IgM antibodies to Toxoplasma gondii are consistent with infection in the last three to six months.
Aliases
- N/A
Specimen Collection
Special Instructions
N/A
Preferred Specimen
1 mL serum
Minimum Volume
0.6 mL
Instructions
N/A
Patient Preparation
N/A
Storage
Plastic screw-cap vial
Transport Temperature
Room Temperature
Specimen Stability
- Room temperature: 4 days
- Refrigerated: 7 days
- Frozen: 30 days
Limitations
The U.S. Food and Drug Administration (FDA) is advising physicians that they should not use the result from any one Toxoplasma IgM commercial test kit as the sole determinant of recent Toxoplasma infection when screening a pregnant patient. Because these tests can have false-positive results, reliance on a single test result could lead to misdiagnosis, resulting in unnecessary treatment of the patient and/or termination of the pregnancy.
Other Acceptable Specimens
N/A
Unacceptable Specimens
Gross hemolysis, grossly lipemic
Order Code
TOXOGM
EPIC (Premier) Code
LAB396
Includes
Toxoplasma Antibody (IgM), Toxoplasma Antibody (IgG)
CPT Code
- 86777
- 86778
Billing Code
- 670731
- 670732
CPT Statement
Methodology
Immunoassay (IA)
FDA Status
FDA Approved
Physician Attestation of Informed Consent
N/A
Testing Laboratory
Quest Diagnostics Nichols Institute
14225 Newbrook Drive
Chantilly VA, 20153
14225 Newbrook Drive
Chantilly VA, 20153
Reference Range
Toxoplasma Antibody (IgG)
Toxoplasma Antibody (IgM)
| IU/mL | Interpretation |
| <7.20 | Negative |
| 7.20-8.79 | Equivocal |
| >8.79 | Positive |
Toxoplasma Antibody (IgM)
| AU/mL | Interpretation |
| <8.00 | Negative |
| 8.00-9.99 | Equivocal |
| >9.99 | Positive |
Setup Schedule / Expected Turnaround Time
Tuesday, Thursday, Saturday; Report available: 2 - 5 days
Specimen Collection
Special Instructions
N/A
Preferred Specimen
1 mL serum
Minimum Volume
0.6 mL
Instructions
N/A
Patient Preparation
N/A
Storage
Plastic screw-cap vial
Transport Temperature
Room Temperature
Specimen Stability
- Room temperature: 4 days
- Refrigerated: 7 days
- Frozen: 30 days
Limitations
The U.S. Food and Drug Administration (FDA) is advising physicians that they should not use the result from any one Toxoplasma IgM commercial test kit as the sole determinant of recent Toxoplasma infection when screening a pregnant patient. Because these tests can have false-positive results, reliance on a single test result could lead to misdiagnosis, resulting in unnecessary treatment of the patient and/or termination of the pregnancy.
Other Acceptable Specimens
N/A
Unacceptable Specimens
Gross hemolysis, grossly lipemic
Result Information
Methodology
Immunoassay (IA)
Testing Laboratory
N/A
Reference Range
Toxoplasma Antibody (IgG)
Toxoplasma Antibody (IgM)
| IU/mL | Interpretation |
| <7.20 | Negative |
| 7.20-8.79 | Equivocal |
| >8.79 | Positive |
Toxoplasma Antibody (IgM)
| AU/mL | Interpretation |
| <8.00 | Negative |
| 8.00-9.99 | Equivocal |
| >9.99 | Positive |
Setup Schedule / Expected Turnaround Time
Tuesday, Thursday, Saturday; Report available: 2 - 5 days