Multilocus sequence typing (MLST) of Listeria monocytogenes
Beatrix Stessl1, Irene Rückerl, Martin Wagner
1Department of Veterinary Public Health and Food Science, Institute of Milk Hygiene, Milk Technology and Food Science, University of Veterinary Medicine, Veterinärplatz 1, 1210, Vienna, Austria, beatrix.stessel@vetmeduni.ac.at.
Methods in Molecular Biology (Clifton, N.J.)
|May 6, 2014
Summary
Multilocus sequence typing (MLST) uses single nucleotide polymorphisms in Listeria monocytogenes housekeeping genes for rapid comparisons. This method aids in reconstructing evolutionary links between bacterial isolates.
Area of Science:
- Microbiology
- Genetics
- Bioinformatics
Background:
- Listeria monocytogenes is a significant foodborne pathogen.
- Accurate and rapid identification and tracking of L. monocytogenes isolates are crucial for public health.
- Existing methods for bacterial typing have limitations in speed, resolution, or interlaboratory comparability.
Purpose of the Study:
- To describe the methodology of Multilocus Sequence Typing (MLST) for Listeria monocytogenes.
- To highlight the advantages of MLST in bacterial isolate characterization and evolutionary analysis.
- To promote the use of standardized, sequence-based typing methods for L. monocytogenes.
Main Methods:
- Utilizes nucleotide sequence data from conserved housekeeping genes.
- Focuses on identifying single nucleotide polymorphisms (SNPs) within these genes.
- Employs open-access databases for data storage and interlaboratory comparison.
Main Results:
- MLST provides a high-resolution genetic fingerprint for L. monocytogenes isolates.
- The method allows for the reconstruction of ancestral relationships and evolutionary pathways.
- Sequence data from housekeeping genes accumulate genetic variations slowly, enabling robust phylogenetic analysis.
Conclusions:
- MLST is a powerful, standardized tool for typing Listeria monocytogenes.
- Its ability to reconstruct evolutionary linkages makes it invaluable for epidemiological studies.
- MLST facilitates rapid, reliable, and interlaboratory comparable characterization of bacterial isolates.
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