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CIRCOVAC   piglet efficacy Laurent Fischer, DVM , PhD Director, Senior Technical Leader R&D, Project and Portfolio Management   - MERIAL
CIRCOVAC piglet efficacy ,[object Object],[object Object],[object Object],[object Object]
CIRCOVAC: characteristics ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Piglet indications     Lesions and virus load in lymphoid tissues     Faecal excretion     Virus load     weight loss     mortality     wasting     Clinical signs Active immunisation
Active immunisation Chevalier  et al,  Proceedings of the 21 st  IPVS Congress, Vancouver, Canada, 2010, p 439 Dossier A.M.M. CIRCOVAC. N°08.609 CIRCOVAC piglets vaccination induces seroneutralizing antibodies:  quick onset and high titres  D0 = Vaccination
Virus load decreased ,[object Object],Significant less pigs positive for viremia and the mean viral load was significantly decreased in the CIRCOVAC vaccinated group  Chevalier  et al ,  Proceedings of the 21 st  IPVS Congress, Vancouver, Canada, 2010, p 437 Expérimental conditions * p<0,0001 * * * D0 = Challenge D0 = Vaccination
Faecal excretion reduced Dossier A.M.M. CIRCOVAC. N° 08.0032.P * * *Student t test p<0,0001 D0  =  Vaccination
Lymphoid lesions reduced Dossier A.M.M. CIRCOVAC. N° 08.0610.R *Fisher test p<0,001 No lesion 80 % lesions Control
Virus load reduced  Dossier A.M.M. CIRCOVAC. N° 08.0610.R Virus load (IHC) of mesenteric lymph nodes Control Photo: Pr Sarli *Fisher test p<0,001
Lymphoid lesions reduced *Student t test p<0,05 Dossier A.M.M. CIRCOVAC. N° 08.0338.R *  Weight (g) of lymph nodes *  Control CIRCOVAC
Lymphoid lesions reduced Control
CIRCOVAC piglets vaccination is efficient ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
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02 laurent fischer

  • 1. CIRCOVAC  piglet efficacy Laurent Fischer, DVM , PhD Director, Senior Technical Leader R&D, Project and Portfolio Management - MERIAL
  • 2.
  • 3.
  • 4. Piglet indications   Lesions and virus load in lymphoid tissues   Faecal excretion   Virus load   weight loss   mortality   wasting   Clinical signs Active immunisation
  • 5. Active immunisation Chevalier et al, Proceedings of the 21 st IPVS Congress, Vancouver, Canada, 2010, p 439 Dossier A.M.M. CIRCOVAC. N°08.609 CIRCOVAC piglets vaccination induces seroneutralizing antibodies: quick onset and high titres D0 = Vaccination
  • 6.
  • 7. Faecal excretion reduced Dossier A.M.M. CIRCOVAC. N° 08.0032.P * * *Student t test p<0,0001 D0 = Vaccination
  • 8. Lymphoid lesions reduced Dossier A.M.M. CIRCOVAC. N° 08.0610.R *Fisher test p<0,001 No lesion 80 % lesions Control
  • 9. Virus load reduced Dossier A.M.M. CIRCOVAC. N° 08.0610.R Virus load (IHC) of mesenteric lymph nodes Control Photo: Pr Sarli *Fisher test p<0,001
  • 10. Lymphoid lesions reduced *Student t test p<0,05 Dossier A.M.M. CIRCOVAC. N° 08.0338.R * Weight (g) of lymph nodes * Control CIRCOVAC
  • 12.

Editor's Notes

  1. N = 3 témoins et 8 vaccinés Vaccinés à 3 sm d’âge Porcelets SPF Tous ont séroconvertit sauf un porcelet! Immunité protectrice à + 2 sm post vaccination (dans le dossier)
  2. Station :étude durée d’immunité: vaccination des porcelets à 3 semaines d’âge 14 semaines avant le challenge N = 12 témoins et 15 vaccinés Vaccinés à 3 sm d’âge Porcelets SPF Challenge intra nasal à 17 semaines d’âge: 2*5 ml de suspension Espagne : Exploitation espagnole avec historique de pcv2 avec mortalité sevrage-vente : 10 à 15 % 1239 porcelets inclus (619 Circovac et 620 témoins négatifs) Les résultats présentés sont ceux du site A ( et sont identiques avec le site B) 56 porcs prélevés vaccinés et 51 porcs témoin prélevés pour recherche qPCR PCV2 Pas mixés pendant l’étude Pourquoi arrêt à 140 jours + 21 jours d’âge = 161?? Lparce que es analyses de virémie n’étaient pas prévu dans le protocole de l’élevage A avant l’abattage. Elles ont par contre été réalisées dans l’élevage B avant abattage (l’âge n’est pas précisé, minimum 168 jours d’âge en tout cas et de toute façon, les données de cet élevage B montre une différence jusqu’à l’abattage pour la virémie en faveur du lot vacciné mais pas pour l’excrétion fécale qui est supérieur dans le lot vacciné au lot témoin juste avant abattage…)
  3. Même exploitation que diapo précédente Fecal samples collected from the same animals: 56 vaccinated pigs and 51 control pigs Control group: 98% positive pig at D98 versus 33% in vaccinated group
  4. 15 vaccinés 15 control D0= date de vaccination (3 sem d’âge) D21= date de challenge D49= euthanasie (1 mois après challenge)
  5. N = 15 porcelets vaccinés et 15 témoins
  6. N = 15 vaccinés et 15 témoins négatifs Vaccinés à 3 sm d’âge puis challengés à 5 sm d’âge Porcelets SPF