Coronavirus respiratoire
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Fermer les portes au BCoV
Immunité locale aux portes d’entrée et de sortie du virus
✔️ Colostrum, issu de vaches vaccinées (Boileau et al., 2010; Maillard et al., 2021)
- Protection locale au niveau digestif
- Réduction de l’excrétion fécale dans leur environnement
- Pas ou peu de protection de l’appareil respiratoire supérieur
> TRANSFERT D’IMMUNITE PASSIVE SPECIFIQUE
Immunité locale au niveau digestif (+/- systémique par le colostrum)
✔️ Vaccination intranasale (Saif et al., 2020; Ridremont B. 2022 ; Van Rooij et al., 2023). La muqueuse intranasale est :
- la porte d’entrée principale,
- le site de réplication et
- la porte de sortie
> IMMUNITE AU NIVEAU DE LA MUQUEUSE RESPIRATOIRE
La muqueuse intranasale est le lieu de :
- l’activation / entraînement de l’immunité innée et adaptative locale,
- l’initialisation de la réponse adaptative au niveau systémique.
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BIBLIOGRAPHIE
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GP-FR-BOV-230700003 – Juillet 2023
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