Mutations in the csgD promoter associated with variations in curli expression in certain strains of Escherichia coli O157:H7

Article Abstract:

A mutation in the csgD promoter of E. coli O157:H7 produces a strain that expresses curli fibers. These surface appendages are produced by E. coli under stressful environmental conditions, but this is the first documentation of their occurrence in strain O157:H7.

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Genotypic analyses of Escherichia coli O157:H7 and O157 nonmotile isolates recovered from beef cattle and carcasses at processing plants in the Midwestern states of the United States

Article Abstract:

Research has been conducted on the Escherichia coli O157:H7 and O157 nonmotile isolates recovered from the feces, hides and carcasses at beef processing plants. The relationship between the cattle infection and carcass contamination has been investigated based on prevalence.

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Evaluation of a real-time PCR kit for detecting Escherichia coli O157 in bovine fecal samples

Article Abstract:

A commercially available real-time, rapid PCR test is evaluated for its ability to detect Escherichia coli O157. Both the sensitivity and specificity of the assay were 99% for isolates in pure culture.

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