Days Set Up
Monday - Friday
Analytic Time

2 - 5 days

Soft Order Code

Test Updated:


Listeria monocytogenes

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Find a Requisition

All specimens should be accompanied by a requisition.

Submitting Specimens

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Test Overview

Test Methodology

Complement Fixation

Test Usage

Establish the presence of antibodies to Listeria monocytogenes

Reference Range

<1:8. Single titers >=1:8 are suggestive of listeria infection. A four-fold or greater increase in titer between acute and convalescent specimens confirms the diagnosis.

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Specimen Requirements

Collection Onsite

Tube must be labeled with whether sample is acute or convalescent. Send both acute and convalescent sera (taken 10 - 14 days after the acute serum sample).

Collection Offsite

Collect specimen in red top tube. Centrifuge, aliquot serum into a plastic vial and refrigerate. Indicate whether sample is acute or convalescent. It is recommended that both acute and convalescent sera (taken 10-14 days after the acute serum sample) be sent.

Red Top Tube
Normal Volume
1 ml serum
Minimum Volume
0.2 ml serum

Billing Information

CPT Code
Pro Fee Code

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Our High Standard

Quality that sets us apart

As the reference laboratory division of Michigan Medicine's Department of Pathology, MLabs shares the institution's commitment to applying established quality principles to clinical laboratory testing. Like other large organizations in complex, consequential fields, we rely on an established approach to monitor quality throughout the testing process.