Virulence factors and markers in Escherichia coli from calves with bacteremia

Mohamed Ou Said, A.; Contrepois, M.G.; Der Vartanian, M.; Girardeau, J.P.

Virulence factors and markers in Escherichia coli from calves with bacteremia

1988

Mohamed Ou Said, A. | Contrepois, M.G. | Der Vartanian, M. | Girardeau, J.P.

Relative pathogenicity of 151 Escherichia coli isolates from 36 calves with bacteremia after necropsy was studied by measurement of the LD50 after mice were inoculated IP with E coli isolates. Study of virulence factors and markers revealed that the pathogenicity of E coli was associated with the production of hydroxamate siderophores and with resistance to serum bactericidal effects. Production of colicins, including colicin V, and of surface antigen 31A was correlated with virulence. The close association between phenotypic expression of virulence factors and markers was consistent with a hypothesis of a localization of genes coding for virulence factors and markers on the same plasmid.

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Mots clés AGROVOC

animals bacteria biosynthesis blood serum calves cattle colicins colicins escherichia coli metabolism microbiology pathogenicity siderophores virulence virulence

Informations bibliographiques

Publié dans

American journal of veterinary research

Volume 49 Numéro 10 Pagination 1657 - 1660 ISSN 0002-9645

D'autres materias

Bacterial adhesion; Hydroxamate siderophore; Iron chelating agents; Veterinary; Cattle diseases; Sepsis; Escherichia coli infections; Surface antigens; Markers

Langue

anglais

Note

2019-12-04

Type

Journal Article; Text

Sur AGRIS depuis: 2024-02-27

Format: MODS

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