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. 1987 Jan;55(1):193–197. doi: 10.1128/iai.55.1.193-197.1987

Presence and expression of aerobactin genes in virulent avian strains of Escherichia coli.

J P Lafont, M Dho, H M D'Hauteville, A Bree, P J Sansonetti
PMCID: PMC260300  PMID: 3539802

Abstract

Virulent and nonvirulent isolates of avian Escherichia coli were tested for the presence of aerobactin genes by colony hybridization with a specific gene probe constructed from plasmid pABN1 (A. Bindereif and J. B. Neilands, J. Bacteriol. 153:1111-1113, 1983). Positive hybridization with the gene probe was highly correlated with virulence, as measured by the 50% lethal dose of the strains for chicks. Evidence for the expression of aerobactin genes in the virulent strains was obtained by demonstrating their susceptibility to cloacin DF13, which binds to the same receptor that binds aerobactin, and their ability to produce aerobactin, as revealed by cross-feeding the E. coli mutant WO987 (aroB fepA iuc iut+), which is unable to synthesize but capable of taking up aerobactin. We suggest that the production of aerobactin is involved in the virulence of avian septicemic E. coli.

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Selected References

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