title: Molecular typing of Yersinia pseudotuberculosis strains isolated from livestock in Brazil.
abstract: Yersinia pseudotuberculosis can infect a broad range of animals. In Brazil, this bacterium has been isolated from healthy and sick animals from sporadic cases and outbreaks of hemorrhagic gastroenteritis among livestock. However, the molecular diversity of these isolates is little understood. In this study, we used multilocus sequence typing, enterobacterial repetitive intergenic consensus PCR and pulsed-field gel electrophoresis to genotype 40 Y. pseudotuberculosis strains belonging to bio-serogroups 1/O:1a and 2/O:3 isolated between 1982 and 1990 in the southern region of Brazil. All three methodologies clustered the strains into two main clusters according to their bio-serogroups. Good correlations were observed between the clusters and the pathogenic potential of the strains. No correlation among the strains was observed according to geographical origin, host, place, or year of isolation. The grouping of the Y. pseudotuberculosis isolated in Brazil determined by these assays leads us to suggest that Brazilian livestock harbor two subpopulations of Y. pseudotuberculosis.
authors.affiliation: Laboratório Nacional de Refência em Yersinia spp. outras que Y. pestis, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brasil.
authors.forename: R A
authors.initials: RA
authors.lastname: Souza
authors.forename: P F M
authors.initials: PF
authors.lastname: Imori
authors.forename: J
authors.initials: J
authors.lastname: Passaglia
authors.forename: A
authors.initials: A
authors.lastname: Pitondo-Silva
authors.forename: J P
authors.initials: JP
authors.lastname: Falcão
mesh_terms: D000820:Animal Diseases / Q000382:microbiology*; D000818:Animals; D001938:Brazil; D016000:Cluster Analysis; D019295:Computational Biology / Q000379:methods; D058751:Livestock / Q000382:microbiology*; D058889:Molecular Typing; D058885:Multilocus Sequence Typing; D010802:Phylogeny; D015011:Yersinia pseudotuberculosis / Q000145:classification* / Q000235:genetics* / Q000302:isolation & purification; D015012:Yersinia pseudotuberculosis Infections / Q000662:veterinary*