Serotype Assignment by Sero-agglutination, ELISA, and PCR

Area of Science:

• Microbiology
• Food Safety
• Bacterial Pathogenesis

Background:

• Serotype designation is a primary subtyping method for Listeria monocytogenes.
• Current methodologies for serotyping are evolving, with whole genome sequencing anticipated as a future replacement.
• Traditional serotyping relies on agglutination reactions.

Purpose of the Study:

• To describe three common non-genomic methods for Listeria monocytogenes serotype designation.
• To evaluate the advantages and disadvantages of each described method.
• To provide an overview of current serotyping techniques prior to widespread adoption of whole genome sequencing.

Main Methods:

• Agglutination reactions for traditional serotyping.
• Enzyme-linked immunosorbent assay (ELISA) for serological detection.
• Polymerase chain reaction (PCR) for genetic-based serotype identification.

Main Results:

• Each method (agglutination, ELISA, PCR) presents distinct advantages and disadvantages.
• Agglutination is a traditional, widely understood method.
• ELISA and PCR offer alternative approaches with varying levels of sensitivity, specificity, and throughput.

Conclusions:

• Non-genomic serotyping methods remain important for Listeria monocytogenes assessment.
• Understanding the strengths and weaknesses of agglutination, ELISA, and PCR is essential for accurate subtyping.
• These methods provide valuable data while whole genome sequencing technologies mature.