Complete genome sequence of bile-isolated Enterococcus avium strain 352

Area of Science:

• Microbiology
• Genomics
• Pathogenesis

Background:

• Enterococcus avium is a Gram-positive bacterium causing severe infections like bacteremia.
• The pathogenic mechanisms and niche adaptation strategies of E. avium remain largely unknown.

Observation:

• Whole genome sequencing of E. avium strain 352, isolated from human bile, was performed.
• The genome comprises a 4.8 Mb chromosome and an 87.7 Kb plasmid.
• The genome contains genes associated with bile adaptation (e.g., bsh, sbcC) and virulence (e.g., esp, fss1).

Findings:

• The E. avium strain 352 genome harbors numerous virulence-associated genes.
• Specific genes identified suggest a role in adapting to and surviving within the bile environment.
• The bacterium possesses a significant number of protein-coding sequences on both its chromosome and plasmid.

Implications:

• The identified virulence factors highlight the potential of E. avium strain 352 to cause infections.
• Genes linked to bile adaptation may explain its persistence in the biliary tract.
• Further comparative genomics can illuminate the evolutionary path of E. avium pathogenesis.