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Test ID HTLLC Human T-Cell Lymphotropic Virus Types 1 and 2 (HTLV-1/-2) Antibody Confirmation, Spinal Fluid

Ordering Guidance

This confirmatory assay should be ordered only on spinal fluid specimens that are consistently reactive by an antihuman T-cell lymphotropic virus 1 and 2 (HTLV-1/-2) screening immunoassay. For an evaluation that includes both screening and confirmation, order HTLVC / Human T-Cell Lymphotropic Virus Types 1 and 2 (HTLV-1/-2) Antibody Screen with Confirmation, Spinal Fluid.


For testing serum specimens, order HTLVL / Human T-Cell Lymphotropic Virus Types I and II (HTLV-I/-II) Antibody Confirmation, Serum.

Necessary Information

Date of collection is required.

Specimen Required

Collection Container/Tube: Sterile vial

Specimen Volume: 0.5 mL

Useful For

Confirmatory detection of human T-cell lymphotropic virus types 1 and 2 (HTLV-1 and HTLV-2)-specific IgG antibodies in spinal fluid specimens that are consistently reactive by initial screening tests


Differentiating between HTLV-1- and HTLV-2-specific IgG antibodies present in spinal fluid

Method Name

Line Immunoassay (LIA)

Reporting Name

HTLV -1/-2 Ab Confirmation, CSF

Specimen Type


Specimen Minimum Volume

0.2 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
CSF Frozen (preferred) 30 days
  Refrigerated  14 days

Reference Values


Day(s) Performed


Report Available

2 to 15 days

Performing Laboratory

Mayo Clinic Laboratories in Rochester

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
HTLLC HTLV -1/-2 Ab Confirmation, CSF 93744-1


Result ID Test Result Name Result LOINC Value
604935 HTLV-1/-2 Ab Confirmation, CSF 93745-8
604945 HTLV-1/-2 Bands 93743-3
604946 HTLV-1/-2 Discrimination 93742-5


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