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HelpTest Code LAB0298430 Human T-Cell Lymphotropic Virus Types I and II Antibody Screen with Confirmation, Serum
Additional Codes
| Mayo Test ID |
|---|
| HTLVI |
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Useful For
Qualitative detection of human T-cell lymphotropic virus types I and II (HTLV-I and HTLV-II)-specific antibodies with confirmation and differentiation between HTLV-I and HTLV-II infection
This test should not be used to screen blood, human cells, tissues, or solid-organ donors.
This test is not intended for use on cord blood specimens.
Testing Algorithm
If the human T-cell lymphotropic virus types I and II (HTLV-I/-II) antibody screen is reactive, then HTLV-I/-II antibody confirmation by line immunoassay will be performed at an additional charge.
Method Name
Enzyme Immunoassay (EIA)
Reporting Name
HTLV-I/-II Ab Screen, SSpecimen Type
SerumOrdering Guidance
This test is for serum specimens only. For spinal fluid specimens, order HTLVC / Human T-Cell Lymphotropic Virus Types 1 and 2 (HTLV-1/-2) Antibody Screen with Confirmation, Spinal Fluid.
Necessary Information
Date of collection is required.
Specimen Required
Collection Container/Tube:
Preferred: Serum gel
Acceptable: Red top
Submission Container/Tube: Plastic vial
Specimen Volume: 1 mL
Collection Instructions:
1. Centrifuge blood collection tube per collection tube manufacturer's instructions (eg, centrifuge within 2 hours of collection for BD Vacutainer tubes).
2. Aliquot serum into plastic vial.
Specimen Minimum Volume
0.6 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Serum | Frozen (preferred) | 28 days | |
| Refrigerated | 7 days |
Reject Due To
| Gross hemolysis | Reject |
| Gross lipemia | Reject |
| Gross icterus | Reject |
| Heat-treated or precipitated specimens | Reject |
Reference Values
Negative
Interpretation
Negative screening results indicate the absence of both human T-cell lymphotropic virus types I and II (HTLV-I- and HTLV-II)-specific IgG antibodies in serum.
A reactive screening test result is suggestive of infection with either HTLV-I or HTLV-II. However, this result does not confirm infection (eg, low specificity), and it cannot differentiate between HTLV-I and HTLV-II infection.
Specimens with reactive screening test results will be tested automatically by the line immunoassay (LIA) confirmatory test. Positive LIA results provide confirmatory evidence of infection with HTLV-I or HTLV-II.
A reactive screening result with a negative or indeterminate confirmatory test result suggests either a false-reactive screening test result or a seroconverting HTLV infection. Repeat testing in 1 to 2 months can clarify the final infection status. Persistently indeterminate confirmatory test results indicate absence of HTLV infection.
Day(s) Performed
Monday, Tuesday, Thursday, Friday
Report Available
1 to 4 daysSpecimen Retention Time
14 daysTest 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
86790
86689 (if appropriate)
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| HTLVI | HTLV-I/-II Ab Screen, S | 29901-6 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| 9539 | HTLV-I/-II Ab Screen, S | 29901-6 |
Reflex Tests
| Test ID | Reporting Name | Available Separately | Always Performed |
|---|---|---|---|
| HTLVL | HTLV-I/-II Ab Confirmation, S | Yes | No |
Forms
If not ordering electronically, complete, print, and send Infectious Disease Serology Test Request (T916) with the specimen.