[Comparative study on three molecular typing methods of Vibrio parahaemolyticus]

Area of Science:

• Microbiology
• Molecular Biology
• Epidemiology

Context:

• Vibrio parahaemolyticus (VP) is a significant foodborne pathogen.
• Understanding the genetic diversity and distribution of VP is crucial for public health surveillance.
• Molecular typing methods are essential for tracking pathogen transmission and outbreaks.

Purpose:

• To evaluate the correlation between three molecular typing methods: pulsed field gel electrophoresis (PFGE), repetitive extragenic palindromic (REP)-PCR, and enterobacterial repetitive intergenic consensus (ERIC)-PCR.
• To explore the genetic relationships among VP strains.
• To understand the distribution and epidemic trends of VP in Liaoning Province by combining serotype analysis.

Summary:

• 150 VP isolates from Liaoning Province were analyzed using serotyping, PFGE, REP-PCR, and ERIC-PCR.
• PFGE, REP-PCR, and ERIC-PCR showed consistent results, with PFGE exhibiting the highest resolution (DI=0.969).
• The predominant serotypes were O3, O1, and O2, with O3:K6 prevalent in clinical isolates and O2 in food isolates.

Impact:

• The study validates the effectiveness of PFGE, REP-PCR, and ERIC-PCR for VP typing.
• PFGE is recommended as the superior method for its high resolution and reproducibility in epidemiological surveillance.
• Identified close genetic relationship between Serotype O3 and O1 strains, aiding in understanding VP evolution and transmission dynamics.