Analysis of Vibrio mimicus clinical strains by arbitrarily primed polymerase chain reaction

Area of Science:

• Microbiology
• Molecular Biology
• Epidemiology

Background:

• Vibrio mimicus is an important bacterial pathogen causing gastrointestinal illness.
• Understanding the genetic diversity and geographic distribution of V. mimicus is crucial for epidemiological surveillance.
• Previous typing methods may have limitations in differentiating strains effectively.

Purpose of the Study:

• To evaluate the utility of arbitrarily primed polymerase chain reaction (AP-PCR) for the molecular typing of clinical Vibrio mimicus strains.
• To assess the genetic relatedness and geographic clustering of V. mimicus isolates using AP-PCR.

Main Methods:

• Fifty-one clinical isolates of Vibrio mimicus from diverse geographic locations were analyzed.
• Arbitrarily primed polymerase chain reaction (AP-PCR) was performed using the primer VMH-3.
• Amplification fragment patterns were used to group the bacterial strains.

Main Results:

• The AP-PCR primer VMH-3 differentiated the 51 V. mimicus strains into 28 distinct groups.
• A common 1.0-kb amplification fragment was observed across all strains, indicating conserved genetic elements.
• Most AP-PCR groups comprised strains from the same geographic region, suggesting localized dissemination, with two exceptions showing inter-regional spread.
• AP-PCR grouping did not consistently correlate with established serogroups.

Conclusions:

• Arbitrarily primed polymerase chain reaction (AP-PCR) is a valuable and straightforward technique for the epidemiological investigation of Vibrio mimicus.
• AP-PCR provides a useful tool for assessing the genetic diversity and population structure of V. mimicus isolates.
• The findings suggest potential regional clustering of V. mimicus strains, with occasional long-range dissemination events.