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Test Code Lepto IgM Leptospira Antibody, IgM

Clinical System Name

Leptospira Antibody, IgM



Leptospira IgM antibody

Leptospira IgM Dot Blot

Sample Requirements

Specimen: Whole Blood

Container(s): Gold SST, Red, Dark Green/Sodium Heparin, or Lt. Green/Lithium Heparin Microtainer(s)

Preferred Vol: 2.0 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: Contaminated, heat-inactivated, Hemolyzed, severely lipemic specimens. Any other body fluid. Repeated freeze/thaw cycles.

Spin: Y

Aliquot: Y

Temp: 2 - 4 C

Storage location: Separate serum or plasma from cells within TWO hours of collection, aliquot 0.05 mL - 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 M and 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: 0.05 mL Serum or Plasma


CPT Codes


Send Out Instructions

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

Send out Monday - Friday with the ARUP courier.