Analysis of type 1 fimbriae expression in verotoxigenic Escherichia coli: a comparison between serotypes O157 and O26

Article Abstract:

Type 1 fimbriae expression in verotoxigenic Escherichia coli (VTEC) has been analyzed with a comparison of serotypes O157 and O26 and investigation of the molecular basis of the differences. The study confirmed the presence of a 16-bp deletion within the regulatory region of fimA (fim switch) in 63 VTEC O157 strains but not in other BREC serotypes tested. The fimswitch is detectable only in the phase off orientation in VTEC O157, but detection of the switch in the phase on orientation correlated with the degree of mannose-sensitive yeast agglutination in VTEC 026. Non-O157 VTEC, especially O26 and O118, can be pathogenic in cattle.

Gene expression, Cell adhesion, Ruminants

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Anomalous DnaA protein binding to the regulatory region of the Escherichia coli aldA gene

Article Abstract:

Anomalous DnaA protein binding has been studied as it occurs in Escherichia coli where it binds to the regulatory region of the aldA gene. The region does not have a canonical DnaA box. Specific binding was shown by in vitro assays.

Japan, Carrier proteins, Transport proteins, Cell cycle

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Interaction of Salmonella choleraesuis, Salmonella dublin and Salmonella typhimurium with porcine and bovine terminal ileum in vivo

Article Abstract:

Interaction of three salmonellas with porcine and bovine terminal ileum in vivo is discussed. Comparative studies on invasiveness were done for Interaction of Salmonella choleraesuis, S. dublin and S. typhimurium. S. dublin could not be studied in some ways because of its tissue-destructive properties.

Health aspects, Swine, Bacterial toxins, Streptomyces, Salmonella, Epithelial cells, Biological invasions, Salmonella typhimurium, Gastrointestinal diseases, Histology, Toxicity testing, Toxicity tests

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