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CHANGING OF THE GENOMIC PATTERN OF SALMONELLA ENTERITIDIS STRAINS ISOLATED IN BRAZIL OVER A 48 YEAR-PERIOD REVEALED BY WHOLE GENOME SNP ANALYSES
Gastroenterite
Padrão Genômico
Cepas
SNPs do Genoma Completo
Gastroenteritis
Brazil
Genomic Pattern
Strains
Whole Genome SNP Analyses
Author
Affilliation
Universidade de São Paulo. Faculdade Ciências Farmacêuticas de Ribeirão Preto. Departamento de Análises Clínicas, Toxicológicas e Bromatológicas. Ribeirão Preto, SP, Brasil
U.S. Food and Drug Administration. Center for Food Safety and Applied Nutrition. Division of Microbiology. College Park, Maryland, USA.
U.S. Food and Drug Administration. Center for Food Safety and Applied Nutrition. Division of Microbiology. College Park, Maryland, USA.
The University of North Carolina at Charlotte. Departments of Bioinformatics and Genomics. Charlotte, NC, USA.
Instituto Adolfo Lutz de Ribeirão Preto. Ribeirão Preto, SP, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Enterobactérias. Rio de Janeiro, RJ, Brasil.
Newcastle University. Newcastle upon Tyne. Newcastle, United Kingdom.
U.S. Food and Drug Administration. Center for Food Safety and Applied Nutrition. Division of Microbiology. College Park, Maryland, USA.
U.S. Food and Drug Administration. Center for Food Safety and Applied Nutrition. Division of Microbiology. College Park, Maryland, USA.
Universidade de São Paulo. Faculdade Ciências Farmacêuticas de Ribeirão Preto. Departamento de Análises Clínicas, Toxicológicas e Bromatológicas. Ribeirão Preto, SP, Brasil
U.S. Food and Drug Administration. Center for Food Safety and Applied Nutrition. Division of Microbiology. College Park, Maryland, USA.
U.S. Food and Drug Administration. Center for Food Safety and Applied Nutrition. Division of Microbiology. College Park, Maryland, USA.
The University of North Carolina at Charlotte. Departments of Bioinformatics and Genomics. Charlotte, NC, USA.
Instituto Adolfo Lutz de Ribeirão Preto. Ribeirão Preto, SP, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Enterobactérias. Rio de Janeiro, RJ, Brasil.
Newcastle University. Newcastle upon Tyne. Newcastle, United Kingdom.
U.S. Food and Drug Administration. Center for Food Safety and Applied Nutrition. Division of Microbiology. College Park, Maryland, USA.
U.S. Food and Drug Administration. Center for Food Safety and Applied Nutrition. Division of Microbiology. College Park, Maryland, USA.
Universidade de São Paulo. Faculdade Ciências Farmacêuticas de Ribeirão Preto. Departamento de Análises Clínicas, Toxicológicas e Bromatológicas. Ribeirão Preto, SP, Brasil
Abstract
Salmonella Enteritidis became the main serovar isolated from gastroenteritis cases in Brazil after the 90’s. In this study we used whole genome sequence analysis to determine the phylogenetic relationships among a collection of strains isolated in Brazil to identify possible genomic diferences between the strains isolated in the pre and post-epidemic period. Also, we compared our data from strains isolated in Brazil to strains available in the public domain from other South American countries. Illumina technology was used to sequence the genome of 256 Salmonella Enteritidis strains isolated over a 48 year-period in Brazil, comprising the pre- and post-epidemic period. Phylogenetic analyses revealed distinct lineages for strains isolated before and after 1994. Moreover, the phage region SE20 that may be related to the emergence of Salmonella Enteritidis worldwide was present only in strains of the post-epidemic cluster. In conclusion, our results showed that the genomic profle of Salmonella Enteritidis strains isolated in Brazil shifted after 1994, replaced by a global epidemic group of strains. It may be hypothesized that the presence of the prophage SE20 might have conferred to these strains a better ability to colonize chicken and consequently to infect and cause disease in humans, which might better explain the increase in the number of S. Enteritidis cases in Brazil and other South American countries. However, to verify this hypothesis further studies are needed.
Keywords in Portuguese
Salmonella EnteritidisGastroenterite
Padrão Genômico
Cepas
SNPs do Genoma Completo
Keywords
Salmonella EnteritidisGastroenteritis
Brazil
Genomic Pattern
Strains
Whole Genome SNP Analyses
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