Recombination between rRNA operons created most of the ribotype variation observed in the seventh pandemic clone of Vibrio cholerae
Article Abstract:
The molecular basis of variation in Vibrio cholera ribotypes is investigated in 47 isolates over 33 years through the analysis of specific enzyme markers and the intergenic spacers between the genes for RNA located at the 16S and 23S ribosomal subunits. Results reveal at least eight recombination events and deletion of tandem operons giving rise to a high degree of ribotype variability. Further, the recombination rate is very high as evidenced by the discovery of new ribotypes within the study period.
Publication Name: Microbiology
Subject: Biological sciences
ISSN: 1350-0872
Year: 1998
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Molecular evolution of the GDP-mannose pathway genes (manB and manC) in Salmonella enterica
Article Abstract:
Results demonstrate that several Salmonella enterica strains exhibit a manB gene, which display a 93 to 99% DNA identity to the colanic acid manB gene of the bacterium. However, the manC genes differ from those of manB genes indicating that these two gene sets have evolved independently.
Publication Name: Microbiology
Subject: Biological sciences
ISSN: 1350-0872
Year: 2001
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Genetic variation of dTDP-L-rhamnose pathway genes in Salmonella enterica
Article Abstract:
Researchers show that the O antigen of Salmonella has been transferred between species and subspecies of S. enterica. The O antigen is a surface component of Gram-negative bacteria.
Publication Name: Microbiology
Subject: Biological sciences
ISSN: 1350-0872
Year: 2000
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