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Beaumont Laboratory

Listeria Antibody

ARUP #99529, EPIC: LAB6297, SOFT: XLIST

Specimen Collection Criteria

Collect (preferred specimen): One plain Red-top tube.
Also acceptable: One Gold-top SST tube.

Physician Office/Drawsite Specimen Preparation

Let specimen clot 30-60 minutes then centrifuge to separate serum from cells. Transfer serum to a plastic transport tube and refrigerate (2-8°C or 36-46°F).

Preparation for Courier Transport

Transport: 1.0 mL serum refrigerated (2-8°C or 36-46°F). (Min: 0.5 mL)

Rejection Criteria

  • Specimens not collected and processed as indicated.

Storage

Specimen Stability for Testing:

Room Temperature (20-26°C or 68-78.8°F): 7 days
Refrigerated (2-8°C or 36-46°F): 14 days
Frozen (-20°C/-4°F or below): 1 month

Specimen Storage in Department Prior to Disposal:

Specimen retention time is determined by the policy of the reference laboratory. Contact the Sendout Laboratory with any questions.

Laboratory

Sent to ARUP Laboratories, Salt Lake City, UT, forwarded to Focus Diagnostics, Cypress, CA.

Performed

Varies.
Results available in 4-9 days.

Reference Range

By report.

Test Methodology

Semi-Quantitative Complement Fixation.

Interpretation

Single titers of greater than or equal to 1:8 are suggestive of Listeria infection. A four-fold or greater increase in titer between acute and convalescent specimens confirms the diagnosis.

Clinical Utility

A serological diagnosis of Listeria infection can be made on the basis of rise in specific antibody between acute and convalescent sera. Serology is also useful in epidemiological studies of Listeria outbreaks whereas single convalescent sera with titers equal to or greater than 1:8 suggest listeria infection.

CPT Code

86609.

Test Codes

ARUP #99529, EPIC: LAB6297, SOFT: XLIST

Last Updated

10/13/2016

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This directory currently reflects information only for specimens collected and/or processed at the Farmington Hills, Grosse Pointe, Royal Oak, and Troy campuses.