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HelpTest Code Lab501 Toxoplasma gondii Antibody, IgG, Serum
Infectious
Performing Laboratory
Barnes-Jewish Hospital Laboratory
Methodology
Multiflex Flow Immunoassay, Bio-Rad Bioplex 2200
Literature References:
Package insert: Bio-Rad Bioplex 2200 System ToRC IgG IFU 04-2019
Specimen Requirements
Specimen Type: Serum
Container/Tube: Plain red top, Red/Grey SST or Gold SST
Specimen Volume: Full tube
Day(s) Test Set Up
Monday through Sunday, 0700-1300
Turnaround Time:
STAT: not available
Routine: results available the day of testing
Test Classification and CPT Coding
86777- Toxoplasma IgG
Reference Values
Reference Value
Toxoplasma, IgG - Negative
Literature References:
1. Package insert: Bio-Rad 2200 System ToRC IgG IFU 04-2019
2. Clinical Laboratory Standards Institute (CLSI). Clinical Use and Interpretation of Serologic Testing for Toxoplasma gondii, Approved guideline. (M36-A), Feb 2004
Interpretive Data
Negative - No detectable antibody.
Equivocal - Presence of detectable antibody cannot be determined.
Positive - Detectable levels of antibody present.
Note: Levels of IgG antibody to Toxoplasma gondii begin to rise 1 to 2 weeks after infection. Peak levels are reached in 6 to 8 weeks, then gradually decline over months to years. Low titers are generally detectable for life. The antibody titer does not correlate with severity of illness.
Specimen Transport Temperature
Ambient
Additional Information
For BJH Laboratory Use Only
Analyte Stability:
Specimen stored at room temperature (8-30° C) for 3 days and store specimen at 2-8° C up to 7 days. Freeze specimen, devoid of RBCs, at ≥-20° C for longer storage. Do not store in a frost free freezer. Specimens tested after 3 freeze/thaw cycles showed no qualitative differences. Mix thoroughly after each thawing.
Avoid hemolysis.
Laboratory Processing Instructions:
Test performed in BJH Core Lab. Centrifuge, separate serum, and refrigerate at 4° C for up to 7 days
LOINC Code Information
| Name | LOINC Code |
| Toxoplasma Antibody, IgG, Immune Status | 5390-0 |