Evolutionary dynamics of Ralstonia solanacearum
Article Abstract:
A study was conducted to investigate the genetic diversity, extent of recombination, natural selection, and population divergence of Ralstonia solanacearum samples obtained from sources worldwide. Ralstonia solanacearum displays high clonality for housekeeping genes in all phylotypes except phylotype III and significant levels of recombination for the virulence-related egl and hrpB genes, which are limited mainly to phylotype strains III and IV.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 2007
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Molecular epidemiology of [bla.sub.CMY-2] plasmids carried by Salmonella enterica and Escherichia coli isolates from cattle in the Pacific Northwest
Article Abstract:
The molecular epidemiology of [bla.sub.CMY-2]-bearing plasmids and Salmonella and Escherichia coli hosts are studied by using restriction analyses. The studies have shown that the hosts have identified shared highly similar plasmids in these species, a clonal host-plasmid relationship in Salmonella enterica serotype Newport and a high diversity of strain types and plasmids among commensal Escherichia coli isolates.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 2007
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Signature-tagged mutagenesis of Edwardsiella ictaluri identifies virulence-related genes, including a Salmonella pathogenicity island 2 class of type III secretion systems
Article Abstract:
Virulence-associated genes in Edwardsiella ictaluri are identified by using the signature-tagged mutagenesis (STM) procedures of Lehoux in the channel catfish waterborne-infection model. The characterization of type III secretion systems (TTSS) apparatus mutant has shown that it has retained its ability to invade catfish cell lines and macrophages, but is defective in intracellular replication.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 2007
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