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Vaccination of calves with EspA, a key colonisation factor of Escherichia coli O157:H7, induces antigen-specific humoral responses but does not confer protection against intestinal colonisation.

Dziva, F, Vlisidou, I, Crepin, VF, Wallis, TS, Frankel, G and Stevens, MP (2007) Vaccination of calves with EspA, a key colonisation factor of Escherichia coli O157:H7, induces antigen-specific humoral responses but does not confer protection against intestinal colonisation. Vet Microbiol, 123 (1-3). pp. 254-261.

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Abstract

Enterohaemorrhagic Escherichia coli (EHEC) infections in humans are frequently associated with direct or indirect contact with ruminant faeces and may result in haemorrhagic colitis and severe renal and neurological sequelae. Broadly cross-protective vaccines for control of EHEC do not yet exist and the molecular mechanisms that influence bacterial persistence in the intestines of ruminants are incompletely understood. We sought to determine the role in colonisation and protective efficacy of EspA, which forms a filamentous extension of the locus of enterocyte effacement-encoded type III secretion system that injects EHEC proteins into enterocytes. A non-polar deletion of espA severely impaired the ability of E. coli O157:H7 to colonise the intestines of calves. Vaccination of calves with highly purified recombinant EspA induced high-titre antigen-specific IgG1 (also reactive to native EspA) and salivary IgA responses, however these responses did not protect calves against intestinal colonisation by E. coli O157:H7 upon experimental infection.

Item Type: Article
Authors :
NameEmailORCID
Dziva, Ff.dziva@surrey.ac.ukUNSPECIFIED
Vlisidou, IUNSPECIFIEDUNSPECIFIED
Crepin, VFUNSPECIFIEDUNSPECIFIED
Wallis, TSUNSPECIFIEDUNSPECIFIED
Frankel, GUNSPECIFIEDUNSPECIFIED
Stevens, MPUNSPECIFIEDUNSPECIFIED
Date : 20 July 2007
Identification Number : https://doi.org/10.1016/j.vetmic.2007.02.016
Uncontrolled Keywords : Animals, Antibodies, Bacterial, Antigens, Bacterial, Carrier State, Cattle, Cattle Diseases, Drug Administration Routes, Escherichia coli O157, Escherichia coli Proteins, Escherichia coli Vaccines, Intestines, Male, Mutation, Time Factors
Related URLs :
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 10:39
Last Modified : 17 May 2017 10:39
URI: http://epubs.surrey.ac.uk/id/eprint/828673

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