Vibrio fluvialis attachs to but does not enter HeLa cell monolayers

Area of Science:

• Microbiology
• Infectious Diseases
• Bacterial Pathogenesis

Background:

• Vibrio fluvialis is an emerging cause of bacterial enteritis.
• A dysenteric form of Vibrio fluvialis enteritis has been observed, suggesting potential invasiveness.
• The role of bacterial invasiveness in Vibrio fluvialis virulence remains underexplored.

Purpose of the Study:

• To investigate the invasiveness of Brazilian Vibrio fluvialis strains in HeLa cell monolayers.
• To determine if plasmid carriage in these strains is associated with invasiveness or adherence.
• To assess the potential contribution of invasiveness to Vibrio fluvialis virulence.

Main Methods:

• Studied 12 Brazilian Vibrio fluvialis isolates (6 clinical, 6 environmental).
• Assessed bacterial entry into HeLa cell monolayers.
• Screened bacterial strains for the presence of plasmids.
• Correlated plasmid carriage with observed adherence and invasion capabilities.

Main Results:

• Four clinical and two environmental isolates demonstrated adherence to HeLa cells but did not invade.
• Five of the 12 studied strains harbored plasmids.
• No significant correlation was found between plasmid carriage and the ability of Vibrio fluvialis strains to adhere to or invade HeLa cells.

Conclusions:

• Invasiveness does not appear to be a common characteristic among the studied Brazilian Vibrio fluvialis strains.
• Plasmid carriage in these isolates was not directly linked to their adhesive or invasive properties.
• Further research is needed to fully elucidate the virulence factors of Vibrio fluvialis, particularly in the context of dysenteric enteritis.