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HelpTest Code TULG Francisella tularensis Antibody, IgG, ELISA, Serum
Reporting Name
F. tularensis Ab, IgG ELISA, SPerforming Laboratory
Mayo Clinic Laboratories in Rochester
Useful For
Evaluating the presence of IgG antibodies in patients with suspected tularemia caused by Francisella tularensis
This test should not be used as a test of cure as it is not quantitative. Patients may remain seropositive for months to years following resolution of disease.
Method Name
Only orderable as part of a profile. For more information see TULAB / Francisella tularensis Antibody, IgM and IgG, ELISA, Serum.
Enzyme-Linked Immunosorbent Assay (ELISA)
Specimen Required
Only orderable as part of a profile. For more information see TULAB / Francisella tularensis Antibody, IgM and IgG, ELISA, Serum.
Supplies: Sarstedt Aliquot Tube, 5 mL (T914)
Collection Container/Tube:
Preferred: Serum gel
Acceptable: Red top
Submission Container/Tube: Plastic vial
Specimen Volume: 0.6 mL
Collection Instructions: Centrifuge and aliquot serum into a plastic vial.
Specimen Type
SerumSpecimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Serum | Refrigerated (preferred) | 7 days | |
| Frozen | 30 days |
Reject Due To
| Gross hemolysis | Reject |
| Gross lipemia | Reject |
| Gross icterus | Reject |
| Heat-inactivated specimen | Reject |
Reference Values
Only orderable as part of a profile. For more information see TULAB / Francisella tularensis Antibody, IgM and IgG, ELISA, Serum.
Negative
Reference values apply to all ages.
Interpretation
|
IgM result |
IgG result |
Interpretation |
|
Negative |
Negative |
No antibodies to Francisella tularensis detected. Antibody response may be negative in samples collected too soon following infection/exposure. Repeat testing on a new sample in 1 to 2 weeks if clinically indicated. |
|
Positive |
Negative |
IgM class antibodies to F tularensis detected, suggesting current or recent infection. Repeat testing in 1 to 2 weeks to detect seroconversion of IgG may be considered to confirm the diagnosis. |
|
Positive |
Borderline |
|
|
Borderline |
Negative |
Questionable presence of IgM antibodies to F tularensis. Consider repeat testing in 1 to 2 weeks. |
|
Borderline |
Positive |
IgG class antibodies to F tularensis detected suggesting recent or past infection. Clinical correlation alongside presentation, exposure history and other laboratory findings required. |
|
Borderline |
Borderline |
Questionable presence of IgM and IgG class antibodies to F tularensis. Consider repeat testing in 1 to 2 weeks. |
|
Positive |
Positive |
IgM and IgG class antibodies to F tularensis detected suggesting current, recent or past infection. Cross-reactions may occur in patients with a current or prior Brucella infection. Clinical correlation alongside presentation, exposure history and other laboratory findings required. |
|
Negative |
Positive |
IgG class antibodies to F tularensis detected suggesting recent or past infection. Clinical correlation alongside presentation, exposure history and other laboratory findings required. |
|
Negative |
Borderline |
Questionable presence of IgG antibodies to F tularensis. Consider repeat testing in 1 to 2 weeks. |
Day(s) Performed
Tuesday, Thursday
Report Available
Same day/1 dayTest 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
86668
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| TULG | F. tularensis Ab, IgG ELISA, S | 93717-7 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| TULG | F. tularensis Ab, IgG ELISA, S | 93717-7 |