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Test Code LAB1249 Leptospira, IgM, Serum

Important Note

Mayo's test code: LEPDT

Useful For

Aiding in the diagnosis of leptospirosis

 

This test is not useful for establishing cure or response to therapy.

Reporting Name

Leptospira, IgM, S

Specimen Type

Serum


Specimen Required


Supplies: Sarstedt Aliquot Tube, 5 mL (T914)

Collection Container/Tube:

Preferred: Serum gel

Acceptable: Red top

Submission Container/Tube: Plastic vial

Specimen Volume: 0.3 mL

Collection Instructions: Centrifuge and aliquot serum into plastic vial.

Additional Information: If acute and convalescent specimens are being obtained to determine seroconversion, they should be collected 2 or more weeks apart.


Specimen Minimum Volume

0.1 mL

Specimen Stability Information

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

Reject Due To

Gross hemolysis Reject
Gross lipemia Reject

Reference Values

Negative

Supportive Data

Accuracy:

A total of 40 previously characterized serum samples tested by the Focus Diagnostics, Inc. Leptospirosis Indirect Hemagglutination Assay (IHA) (30 were positive and 10 were negative) were evaluated by the GenBio Leptospira IgM ImmunDOT assay. A summary of the results is provided in Table.

 

Table. Comparison of the GenBio and Focus Diagnostics Leptospira assays

 

Focus IHA pos

Focus IHA neg

ImmunoDOT pos

30

0

ImmunoDOT neg

0

10

 

Positive Agreement: 100% (30/30); 95% CI 86.5%-100%

Negative Agreement: 100% (10/10); 95% CI 67.9%-100%

Overall Agreement: 100% (40/40); 95% CI 89.5%-100%

Day(s) Performed

Monday, Thursday

Report Available

Same day/1 to 5 days

Specimen Retention Time

14 days

Performing Laboratory

Mayo Clinic Laboratories in Rochester

CPT Code Information

86720

LOINC Code Information

Test ID Test Order Name Order LOINC Value
LEPDT Leptospira, IgM, S 23201-7

 

Result ID Test Result Name Result LOINC Value
65183 Leptospira, IgM, S 23201-7

Forms

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