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Test Code Lepto IgM Leptospira Antibody, IgM

Clinical System Name

Leptospira Antibody, IgM



Sample Requirements

Specimen: Whole blood

Container(s):  Dark Green/Sodium Heparin or Red or Gold SST

Preferred Vol: 2 mL

Minimum Vol:  0.5 mL


Note: Deliver to the Lab within 1/2 hour of collection. Please mark specimen plainly as acute or convalescent. Convalescent specimens may be sent within 30 days of acute specimens.

Processing Instructions

Reject due to: Avoid thawing and refreezing.

Spin: Y

Aliquot: Y

Temp: 4 C

Storage location: Separate serum or plasma from cells within 2 hours of collection, aliquot 0.05 - 1 mL. Place sample in the CPA refrigerator Send Outs rack.


Off-site collection: Separate serum or plasma from cells within 2 hours of collection.


Specimen Type Temperature Time
Serum or plasma Room temp

48 h

  Refrigerated 2 w

1 y



STAT Performed TAT
N Drawn daily, performed M, Th 1 - 5 d


Performing Laboratory

ARUP Laboratories

500 Chipeta Way
Salt Lake City, UT 84108-1221


Phone Number: (800) 522-2787


Department: Send Outs


Phone Number: (206) 987-2563

Reference Range

Negative: No significant level of Leptospira IgM antibody detected.
Equivocal: Questionable presence of Leptospira IgM antibody detected. Repeat testing in 10-14 days may be helpful.
Positive: Presence of IgM antibody to Leptospira detected, suggestive of a current or recent infection.


Method: Qualitative Immunoblot

Analytical Volume: None specified


CPT Codes

86720 (TLZ 01/13/16)

Send Out Instructions


Reference Test Name: Leptospira Antibody, IgM by Dot Blot
Reference Test Number: 0055233

Send out Mon - Fri with ARUP courier.