Reduced faecal shedding of Escherichia coli O157:H7 in cattle following systemic vaccination with γ-intimin C₂₈₀ and EspB proteins.

Autor: Vilte DA; Instituto de Patobiología, Instituto Nacional de Tecnología Agropecuaria (INTA), Los Reseros y Las Cabañas, 1712 Castelar, Argentina., Larzábal M, Garbaccio S, Gammella M, Rabinovitz BC, Elizondo AM, Cantet RJ, Delgado F, Meikle V, Cataldi A, Mercado EC
Jazyk: angličtina
Zdroj: Vaccine [Vaccine] 2011 May 23; Vol. 29 (23), pp. 3962-8. Date of Electronic Publication: 2011 Apr 06.
DOI: 10.1016/j.vaccine.2011.03.079
Abstrakt: Enterohaemorrhagic Escherichia coli (EHEC) O157:H7 is the most prevalent EHEC serotype that has been recovered from patients with haemolytic uremic syndrome (HUS) worldwide. Vaccination of cattle, the main reservoir of EHEC O157:H7, could be a logical strategy to fight infection in humans. This study evaluated a vaccine based on the carboxyl-terminal fragment of 280 amino acids of γ-intimin (γ-intimin C₂₈₀) and EspB, two key colonization factors of E. coli O157:H7. Intramuscular immunization elicited significantly high levels of serum IgG antibodies against both proteins. Antigen-specific IgA and IgG were also induced in saliva, but only the IgA response was significant. Following experimental challenge with E. coli O157:H7, a significant reduction in bacterial shedding was observed in vaccinated calves, compared to control group. These promising results suggest that systemic immunization of cattle with intimin and EspB could be a feasible strategy to reduce EHEC O157:H7 faecal shedding in cattle.
(Copyright © 2011 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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