About: Trivalent Salmonella vaccine for poultry protection     Goto   Sponge   NotDistinct   Permalink

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Description
  • Our recent results with SPI1-lon-fliC attenuated Salmonella Enteritidis strain showed that it is attenuated for chickens and immunogenic when orally applied to 1- and 21-day old chickens with a challenge on day 42 of life. When preparing this project proposal, we have been testing also the cross protectivity of S. Enteritidis vaccine to the infection of poultry with other serovars but based on published data, the significant cross protectivity is quite unlikely. That is why in this project we will prepare a trivalent vaccine containing attenuated mutants of S. Enteritidis, Typhimurium and Infantis. Partner Bioveta a.s. will test these strains individually according to the requirements of official authorities, e.g. stability of the attenuation during prolonged laboratory subcultures, persistence of the vaccine strain in the environment outside the vaccinated host, resistance to common disinfectants etc. Partner VUVeL will primarily test the optimal composition of the trivalent vaccine, representation of individual serovars in the vaccine and ideal vaccination scheme. Carefully characterised trivalent vaccine for the complex protection of poultry against Salmonella infection will be available at the end of this project, ready for clinical trials followed by its commercial production. (en)
  • Cílem projektu bude otestovat možnost komplexní ochrany chovů drůbeže pomocí živé atenuované trivalentní (obsahující tři různé serovary salmonel) vakcíny určené k orální aplikaci, z nichž každý bude oslabený dvěmi mutacemi (delece SPI1 a delece genu lon) a bude mít serologickou značku založenou na deleci genu pro bičík (Fla). Cílem projektu tedy bude i) otestovat atenuaci a imunogenitu dvojnásobných mutantů SPI1-Fla- a lon-Fla- S. Infantis (vzhledem k přirozeně nižší virulenci S. Infantis) a porovnat ji s vlastnostmi trojnásobného mutanta SPI1-lon-Fla, ii) připravit trojnásobného mutanta SPI1-lon-Fla- u S. Typhimurium a otestovat jeho atenuaci a imunogenitu při homologní čelenži na modelu jednodenních kuřat, iii) porovnat chráněnost kuřat orálně vakcinovaných vakcínou obsahující oslabené kmeny všech 3 serovarů (Typhimurium, Infantis a Enteritidis) před infekcí serovary obsažených ve vakcíně a i před serovary ve vakcíně neobsaženými (např. S. Virchow, S. Hadar, nebo S. Agona).
Title
  • Trivalent Salmonella vaccine for poultry protection (en)
  • Trivalentní salmonelová vakcína na ochranu chovů drůbeže
skos:notation
  • QJ1310019
http://linked.open...avai/cep/aktivita
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  • Salmonella; poultry; vaccine; Enteritidis; Typhimurium; Infantis (en)
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  • Salmonella
  • vaccine
  • Enteritidis
  • Typhimurium
  • poultry
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