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HelpTest Code TXMGP Toxoplasma gondii Antibody, IgM and IgG, Serum
Useful For
Determining whether a patient has had previous exposure to or recent infection with Toxoplasma gondii
IgG is not useful for diagnosing infection in infants younger than 6 months of age. IgG antibodies in this age group usually are the result of passive transfer from the mother.
Profile Information
| Test ID | Reporting Name | Available Separately | Always Performed |
|---|---|---|---|
| TXM | Toxoplasma Ab, IgM, S | Yes | Yes |
| TOXGP | Toxoplasma Ab, IgG, S | Yes | Yes |
Method Name
Multiplex Flow Immunoassay (MFI)
Reporting Name
Toxoplasma Ab, IgM and IgG, SSpecimen Type
SerumSpecimen Required
Collection Container/Tube:
Preferred: Serum gel
Acceptable: Red top
Submission Container/Tube: Aliquot tube
Specimen Volume: 1.5 mL
Collection Instructions: Centrifuge and aliquot serum into a plastic vial.
Specimen Minimum Volume
0.8 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Serum | Refrigerated (preferred) | 14 days | |
| Frozen | 14 days |
Reference Values
Toxoplasma IgM
Negative
Toxoplasma IgG
Negative
Toxoplasma IgG Value
≤9 IU/mL (Negative)
10-11 IU/mL (Equivocal)
≥12 IU/mL (Positive)
Reference values apply to all ages.
Day(s) Performed
Monday through Saturday
Report Available
Same day/1 to 3 daysPerforming Laboratory
Mayo Clinic Laboratories in Rochester
CPT Code Information
86778-Toxoplasma IgM
86777-Toxoplasma IgG
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| TXMGP | Toxoplasma Ab, IgM and IgG, S | 88746-3 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| TOXG | Toxoplasma Ab, IgG, S | 40677-7 |
| TXM | Toxoplasma Ab, IgM, S | 40678-5 |
| DEXG6 | Toxoplasma IgG Value | 8039-0 |
Forms
If not ordering electronically, complete, print, and send Infectious Disease Serology Test Request (T916) with the specimen.