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Test Code HTLVL Human T-Cell Lymphotropic Virus Types I and II (HTLV-I/-II) Antibody Confirmation, Serum

Reporting Name

HTLV-I/-II Ab Confirmation, S

Useful For

Confirmatory detection of human T-cell lymphotropic virus types I and II (HTLV-I and HTLV-II)-specific IgG antibodies in human serum specimens that are consistently reactive by initial screening tests


Differentiating between HTLV-I- and HTLV-II-specific IgG antibodies

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Specimen Type

Serum SST

Ordering Guidance

This confirmatory assay should be ordered only on serum specimens that are consistently reactive by an antihuman T-cell lymphotropic virus 1 and 2 (anti-HTLV-I/-II) screening immunoassay. For an evaluation that includes screening and confirmation, order HTLVI / Human T-Cell Lymphotropic Virus Types I and II Antibody Screen with Confirmation, Serum.


For testing spinal fluid specimens, order HTLLC / Human T-Cell Lymphotropic Virus Types 1 and 2 (HTLV-1/-2) Antibody Confirmation, Spinal Fluid.

Necessary Information

Date of collection is required.

Specimen Required

Collection Container/Tube: Serum gel

Submission Container/Tube: Plastic vial

Specimen Volume: 0.5 mL

Collection Instructions:

1. Centrifuge blood collection tube per collection tube manufacturer's instructions (eg, centrifuge and aliquot within 2 hours of collection for BD Vacutainer tubes).

2. Aliquot serum into plastic vial.

Specimen Minimum Volume

0.2 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Serum SST Frozen (preferred)
  Refrigerated  7 days

Reference Values


Day(s) Performed


Test Classification

This test was developed, and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the US Food and Drug Administration.

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
HTLVL HTLV-I/-II Ab Confirmation, S 55162-2


Result ID Test Result Name Result LOINC Value
83277 HTLV-I/-II Ab Confirmation, S 22362-8
23898 HTLV-I/-II Bands 61112-9
23899 HTLV-I/-II Discrimination 77744-1

Report Available

2 to 15 days

Method Name

Line Immunoassay (LIA)


If not ordering electronically, complete, print, and send Infectious Disease Serology Test Request (T916) with the specimen.