Efficacy of a recombinant Intimin, EspB and Shiga toxin 2B vaccine in calves experimentally challenged with Escherichia coli O157:H7
Escherichia coli O157:H7 is a zoonotic pathogen of global importance and the serotype of Shiga toxin-producing E. coli (STEC) most frequently associated with Hemolytic Uremic Syndrome (HUS) in humans. The main STEC reservoir is cattle. Vaccination of calves with the carboxy-terminal fraction of Inti...
| Autores principales: | , , , , , , , , , |
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| Formato: | Artículo |
| Lenguaje: | Inglés |
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Elsevier
2018
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| Materias: | |
| Acceso en línea: | https://www.sciencedirect.com/science/article/pii/S0264410X18306790?via%3Dihub http://hdl.handle.net/20.500.12123/3753 https://doi.org/10.1016/j.vaccine.2018.05.059 |
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| author | Martorelli, Luisina Garimano, Nicolás Fiorentino, Gabriela A. Vilte, Daniel Alejandro Garbaccio, Sergio Gabriel Barth, Stefanie A. Menge, Christian Ibarra, Cristina Adriana Palermo, Marina Sandra Cataldi, Angel Adrian |
| author_browse | Barth, Stefanie A. Cataldi, Angel Adrian Fiorentino, Gabriela A. Garbaccio, Sergio Gabriel Garimano, Nicolás Ibarra, Cristina Adriana Martorelli, Luisina Menge, Christian Palermo, Marina Sandra Vilte, Daniel Alejandro |
| author_facet | Martorelli, Luisina Garimano, Nicolás Fiorentino, Gabriela A. Vilte, Daniel Alejandro Garbaccio, Sergio Gabriel Barth, Stefanie A. Menge, Christian Ibarra, Cristina Adriana Palermo, Marina Sandra Cataldi, Angel Adrian |
| author_sort | Martorelli, Luisina |
| collection | INTA Digital |
| description | Escherichia coli O157:H7 is a zoonotic pathogen of global importance and the serotype of Shiga toxin-producing E. coli (STEC) most frequently associated with Hemolytic Uremic Syndrome (HUS) in humans. The main STEC reservoir is cattle. Vaccination of calves with the carboxy-terminal fraction of Intimin γ (IntC280) and EspB can reduce E. coli O157:H7 fecal shedding after experimental challenge. Shiga toxin (Stx) exerts local immunosuppressive effects in the bovine intestine and Stx2B fused to Brucella lumazine synthase (BLS-Stx2B) induces Stx2-neutralizing antibodies. To determine if an immune response against Stx could improve a vaccine’s effect on fecal shedding, groups of calves were immunized with EspB + IntC280, with EspB + IntC280 + BLS-Stx2B, or kept as controls. At 24 days post vaccination calves were challenged with E. coli O157:H7. Shedding of E. coli O157:H7 was assessed in recto-anal mucosal swabs by direct plating and enrichment followed by immunomagnetic separation and multiplex PCR. Calves were euthanized 15 days after the challenge and intestinal segments were obtained to assess mucosal antibodies. Vaccination induced a significant increase of IntC280 and EspB specific antibodies in serum and intestinal mucosa in both vaccinated groups. Antibodies against Stx2B were detected in serum and intestinal mucosa of animals vaccinated with 3 antigens. Sera and intestinal homogenates were able to neutralize Stx2 verocytotoxicity compared to the control and the 2-antigens vaccinated group. Both vaccines reduced E. coli O157:H7 shedding compared to the control group. The addition of Stx2B to the vaccine formulation did not result in a superior level of protection compared to the one conferred by IntC280 and EspB alone. It remains to be determined if the inclusion of Stx2B in the vaccine alters E. coli O157:H7 shedding patterns in the long term and after recurrent low dose exposure as occurring in cattle herds. |
| format | Artículo |
| id | INTA3753 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2018 |
| publishDateRange | 2018 |
| publishDateSort | 2018 |
| publisher | Elsevier |
| publisherStr | Elsevier |
| record_format | dspace |
| spelling | INTA37532019-06-12T15:16:33Z Efficacy of a recombinant Intimin, EspB and Shiga toxin 2B vaccine in calves experimentally challenged with Escherichia coli O157:H7 Martorelli, Luisina Garimano, Nicolás Fiorentino, Gabriela A. Vilte, Daniel Alejandro Garbaccio, Sergio Gabriel Barth, Stefanie A. Menge, Christian Ibarra, Cristina Adriana Palermo, Marina Sandra Cataldi, Angel Adrian Antigens Synthetic Vaccines Calves Antígenos Vacuna Sintética Ternero Escherichia coli Escherichia coli O157:H7 is a zoonotic pathogen of global importance and the serotype of Shiga toxin-producing E. coli (STEC) most frequently associated with Hemolytic Uremic Syndrome (HUS) in humans. The main STEC reservoir is cattle. Vaccination of calves with the carboxy-terminal fraction of Intimin γ (IntC280) and EspB can reduce E. coli O157:H7 fecal shedding after experimental challenge. Shiga toxin (Stx) exerts local immunosuppressive effects in the bovine intestine and Stx2B fused to Brucella lumazine synthase (BLS-Stx2B) induces Stx2-neutralizing antibodies. To determine if an immune response against Stx could improve a vaccine’s effect on fecal shedding, groups of calves were immunized with EspB + IntC280, with EspB + IntC280 + BLS-Stx2B, or kept as controls. At 24 days post vaccination calves were challenged with E. coli O157:H7. Shedding of E. coli O157:H7 was assessed in recto-anal mucosal swabs by direct plating and enrichment followed by immunomagnetic separation and multiplex PCR. Calves were euthanized 15 days after the challenge and intestinal segments were obtained to assess mucosal antibodies. Vaccination induced a significant increase of IntC280 and EspB specific antibodies in serum and intestinal mucosa in both vaccinated groups. Antibodies against Stx2B were detected in serum and intestinal mucosa of animals vaccinated with 3 antigens. Sera and intestinal homogenates were able to neutralize Stx2 verocytotoxicity compared to the control and the 2-antigens vaccinated group. Both vaccines reduced E. coli O157:H7 shedding compared to the control group. The addition of Stx2B to the vaccine formulation did not result in a superior level of protection compared to the one conferred by IntC280 and EspB alone. It remains to be determined if the inclusion of Stx2B in the vaccine alters E. coli O157:H7 shedding patterns in the long term and after recurrent low dose exposure as occurring in cattle herds. Instituto de Patobiología Fil: Martorelli, Luisina. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patobiología; Argentina Fil: Garimano, Nicolás. Universidad de Buenos Aires. Facultad de Medicina. Departamento de Ciencias Fisiológicas. Laboratorio de Fisiopatogenia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Fisiología y Biofísica Bernardo Houssay. Universidad de Buenos Aires. Facultad de Medicina. Instituto de Fisiología y Biofísica Bernardo Houssay; Argentina Fil: Fiorentino, Gabriela A. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Medicina Experimental. Academia Nacional de Medicina de Buenos Aires. Instituto de Medicina Experimental; Argentina. Academia Nacional de Medicina de Buenos Aires. Laboratorio de Patogénesis e Inmunología de Procesos Infecciosos; Argentina Fil: Vilte, Daniel Alejandro. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patobiología; Argentina Fil: Garbaccio, Sergio Gabriel. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patobiología; Argentina Fil: Barth, Stefanie A. Friedrich-Loeffler-Institut. Institute of Molecular Pathogenesis; Alemania Fil: Menge, Christian. Friedrich-Loeffler-Institut. Institute of Molecular Pathogenesis; Alemania Fil: Ibarra, Cristina E. Universidad de Buenos Aires. Facultad de Medicina. Departamento de Ciencias Fisiológicas. Laboratorio de Fisiopatogenia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Fisiología y Biofísica Bernardo Houssay. Universidad de Buenos Aires. Facultad de Medicina. Instituto de Fisiología y Biofísica Bernardo Houssay; Argentina Fil: Palermo, Marina Sandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Medicina Experimental. Academia Nacional de Medicina de Buenos Aires. Instituto de Medicina Experimental; Argentina. Academia Nacional de Medicina de Buenos Aires. Laboratorio de Patogénesis e Inmunología de Procesos Infecciosos; Argentina Fil: Cataldi, Angel Adrian. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Biotecnología; Argentina 2018-11-01T10:53:15Z 2018-11-01T10:53:15Z 2018-06 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion https://www.sciencedirect.com/science/article/pii/S0264410X18306790?via%3Dihub http://hdl.handle.net/20.500.12123/3753 0264-410X https://doi.org/10.1016/j.vaccine.2018.05.059 eng info:eu-repo/semantics/restrictedAccess application/pdf Elsevier Vaccine 36 (27) : 3949-3959 (Junio 2018) |
| spellingShingle | Antigens Synthetic Vaccines Calves Antígenos Vacuna Sintética Ternero Escherichia coli Martorelli, Luisina Garimano, Nicolás Fiorentino, Gabriela A. Vilte, Daniel Alejandro Garbaccio, Sergio Gabriel Barth, Stefanie A. Menge, Christian Ibarra, Cristina Adriana Palermo, Marina Sandra Cataldi, Angel Adrian Efficacy of a recombinant Intimin, EspB and Shiga toxin 2B vaccine in calves experimentally challenged with Escherichia coli O157:H7 |
| title | Efficacy of a recombinant Intimin, EspB and Shiga toxin 2B vaccine in calves experimentally challenged with Escherichia coli O157:H7 |
| title_full | Efficacy of a recombinant Intimin, EspB and Shiga toxin 2B vaccine in calves experimentally challenged with Escherichia coli O157:H7 |
| title_fullStr | Efficacy of a recombinant Intimin, EspB and Shiga toxin 2B vaccine in calves experimentally challenged with Escherichia coli O157:H7 |
| title_full_unstemmed | Efficacy of a recombinant Intimin, EspB and Shiga toxin 2B vaccine in calves experimentally challenged with Escherichia coli O157:H7 |
| title_short | Efficacy of a recombinant Intimin, EspB and Shiga toxin 2B vaccine in calves experimentally challenged with Escherichia coli O157:H7 |
| title_sort | efficacy of a recombinant intimin espb and shiga toxin 2b vaccine in calves experimentally challenged with escherichia coli o157 h7 |
| topic | Antigens Synthetic Vaccines Calves Antígenos Vacuna Sintética Ternero Escherichia coli |
| url | https://www.sciencedirect.com/science/article/pii/S0264410X18306790?via%3Dihub http://hdl.handle.net/20.500.12123/3753 https://doi.org/10.1016/j.vaccine.2018.05.059 |
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