Web Content Viewer

Listeria monocytogenes (Referred Isolate)

Use of Test

Identification and genotyping for epidemiologic investigation

Test Includes

Identification by Matrix-Assisted Laser Desorption/Ionization-Time of Flight Mass Spectrometry (MALDI-TOF MS); Whole Genome Sequencing (WGS)


Test is available to all clinical laboratories.


Refer to the current “ODH Request for Bacterial Isolates and Patient Specimens” letter for related information.


Public health investigation testing - Exempt

Causes for Rejection

Inappropriate specimen transport container; Unlabeled or mislabeled specimen; Inappropriate transport conditions; Incomplete or missing specimen submission form; Specimen leakage during transport; Inappropriate specimen for test ordered; Specimen outdated, exceeds appropriate time from collection to receipt; Quantity not sufficient to perform test; Improperly preserved specimen

Turnaround Time

2 days (MALDI-TOF MS); 7 days (WGS)

Forms Required

Microbiology Submission Form (HEA 2530)

Specimen Requirements

Pure culture on agar slant or bacteriology transport swab of pure culture

Shipping Requirements

Ship overnight at ambient temperature in compliance with federal regulations and local guidelines. Refer to the Shipping Resources page for more information.