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- Title
Comparative genomic analysis of clinical and environmental strains provides insight into the pathogenicity and evolution of Vibrio parahaemolyticus.
- Authors
Lei Li; Hin-chung Wong; Wenyan Nong; Man Kit Cheung; Patrick Tik Wan Law; Kai Man Kam; Hoi Shan Kwan
- Abstract
Background Vibrio parahaemolyticus is a Gram-negative halophilic bacterium. Infections with the bacterium could become systemic and can be life-threatening to immunocompromised individuals. Genome sequences of a few clinical isolates of V. parahaemolyticus are currently available, but the genome dynamics across the species and virulence potential of environmental strains on a genome-scale have not been described before. Results Here we present genome sequences of four V. parahaemolyticus clinical strains from stool samples of patients and five environmental strains in Hong Kong. Phylogenomics analysis based on single nucleotide polymorphisms revealed a clear distinction between the clinical and environmental isolates. A new gene cluster belonging to the biofilm associated proteins of V. parahaemolyticus was found in clincial strains. In addition, a novel small genomic island frequently found among clinical isolates was reported. A few environmental strains were found harboring virulence genes and prophage elements, indicating their virulence potential. A unique biphenyl degradation pathway was also reported. A database for V. parahaemolyticus (http://kwanlab.bio.cuhk.edu.hk/vp) was constructed here as a platform to access and analyze genome sequences and annotations of the bacterium. Conclusions We have performed a comparative genomics analysis of clinical and environmental strains of V. parahaemolyticus. Our analyses could facilitate understanding of the phylogenetic diversity and niche adaptation of this bacterium.
- Subjects
HONG Kong (China); VIBRIO parahaemolyticus genetics; COMPARATIVE genomics; IMMUNOCOMPROMISED patients; NUCLEOTIDE sequence
- Publication
BMC Genomics, 2014, Vol 15, Issue 1, p256
- ISSN
1471-2164
- Publication type
Article
- DOI
10.1186/1471-2164-15-1135