2 - 5 days
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Establish the presence of antibodies to Listeria monocytogenes
<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.
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).
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.