Genome dynamics and evolution of Salmonella Typhi strains from the typhoid-endemic zones.

ABSTRACT: Typhoid fever poses significant burden on healthcare systems in Southeast Asia and other endemic countries. Several epidemiological and genomic studies have attributed pseudogenisation to be the major driving force for the evolution of Salmonella Typhi although its real potential remains elusive. In the present study, we analyzed genomes of S. Typhi from different parts of Southeast Asia and Oceania, comprising of isolates from outbreak, sporadic and carrier cases. The genomes showed high genetic relatedness with limited opportunity for gene acquisition as evident from pan-genome structure. Given that pseudogenisation is an active process in S. Typhi, we further investigated core and pan-genome profiles of functional and pseudogenes separately. We observed a decline in core functional gene

SUBMITTER: Baddam R 

PROVIDER: S-EPMC4264004 | biostudies-literature | 2014 Dec

REPOSITORIES: biostudies-literature