programme de vaccination poulet de chair pdf

startxref The fowlpox-Newcastle Disease virus effectively immunized against virulent fowlpox challenge and virulent Newcastle disease challenge (intramuscular or intra-ocular administration). The presence of maternally derived antibody in conventional layer chickens limited, if not completely abrogated, their immune responses to vaccination. endstream endobj 159 0 obj<> endobj 160 0 obj<> endobj 161 0 obj<> endobj 162 0 obj<>stream Des échantillons sériques ont été prélevés chez cinq poulets de chaque parquet aux J18 et J31. Centre d’Études et de Recherches Vétérinaires et Agrochimiques (CER, À l’heure actuelle, les vaccins commerciaux les. 5. Le renforcement du système immunitaire chez les espèces aviaires vulnérables est devenu une approche fortement recherchée pour les protéger contre les infections, surtout d’origine virale. It is induced by an avian paramyxoviruses serotype 1, named ND virus (NDV). This latter glycoprotein can perform the fusion between the cellular membrane and the viral envelope. 175 0 obj<>stream ... Chez ce dernier, les pathologies virales, en l'occurrence la maladie combattre ces infections. Ecocongo • 1 Agriculture Principales vaccinations des volailles et programmes Mots clés : volaille, poules, poulet de chair, maladies, vaccination, prévention Explications des mécanismes naturels de défense contre les maladies infectieuses et analyse de la vaccination : objectifs, 0 H��Tۊ�0}�ẈS�D�� )%��bw> 0A�l�1�wXyI2��*�b'�i���-!�]/>�j�)�ʬ��)���X�FA(�8hMMS%����Y��U)�Ajb��`M�F��ҊɊ g�I��$2�jHr`��3#�t6Ɋ��%+�į���g���f0���� 0000001908 00000 n Then, new vaccines candidates are investigated in laboratory to improve the efficacy of conventional commercial vaccines while new tools of immunity measure are developed to increase the understanding of the protective immune response against NDV. Virulent strains require to be, The continuous outbreaks of fatal Newcastle disease (ND) in commercial poultry flocks demonstrate that current vaccination strategies are not fully efficacious and should be improved by new generation of vaccines. H�Ԗy8����w�0�bhd�,}gc+[E�%�R�� c���?��VYZd�_DB֢�{JE$���'J�6 The safety characteristics of the recombinant virus equalled or exceeded those of the parent fowlpox virus, as determined by lack of shed and spread to contacts, failure to revert to virulence following passage in chicks and innocuity in other avian species. x�b```�V��" ���,`bLp���p�0]`�c�������=6^��o����/0�`P`�e�7`dbh������ �Y,�I����N��� Newcastle disease, virus, vaccination, chicken. 0000003709 00000 n Toutefois, il existe des variations en fonction du pays, de la et limites, parmi lesquels l’interférence des MDA. pour assurer une bonne protection du troupeau. )-���u���{��ޞ{��}���|��|?�9���~ �[��n�5��x� PHur[C�{� ���h��lR��^Į K��BggDP�@X> $��D ��! 150 0 obj <> endobj The humoral, cell-mediated and local immunity were followed weekly and birds were challenged with a viscerotropic velogenic ND virus strain at 6 and 10 weeks of age. This was also applied to a set of 15 nigerian field isolates of PMV1 to provide molecular characterization of those, Biotechnology, Agronomy, Society and Environment. /// Se estudió la respuesta de anticuerpos contra un poxvirus aviar recombinante inoculado en pollos en presencia o ausencia de anticuerpos contra el virus de la enfermedad de Newcastle o contra poxvirus aviar. 0000002137 00000 n ~M��wܕ�d�,v���v�$���d2�H�&���d����*�B+�n�h.$?Ņ P�jje=5�rT�(ȉ� �(*OW����1�b��oE$�8���E�4J�K���������'������k�{|T�M�CGƳۚu�����y=��͢���nx�37��.נ����g9�(ސ��]ɍ;EӉ��W�g��L$�J�? Reçu le 30 janvier 2009, accepté le 11 mai 2009. d’un élevage à l’autre. À l’heure actuelle, deux vaccins de type, des œufs embryonnés d’environ 18 jours, c’est-à-dire, durant leur période de croissance et l’interférence, dès lors fortement le pourcentage d’éclosion. 0000023752 00000 n Ce type de vaccin recombinant permettrait, D’autres stratégies vaccinales ont été investiguées, moduler la réponse immune locale au niveau, muqueuses et la réponse immune systémique. endstream endobj 163 0 obj<>stream Control of ND primarily consists of vaccination of flocks and culling of infected or likely infected birds. H�TP�n� �� A previously described, Newcastle Disease (ND), also termed fowl pest, is a highly contagious and devastating disease in poultry. ainsi qu’à l’espèce hôte des différentes souches. Live viruses of low virulence (apathogenic, lentogenic) or of moderate virulence (mesogenic) are used depending on the disease situation and the regulations. xref valeur génétique et aux volailles reproductrices. ����A�iiipAA�A���piT����0�.�"P>���C�!a�n��K"�tn�7@Z�m�v�01H�`l`�a�r��U�� �n%��O�$%0MZ�lKݢYS���~���\&�Ao����� ��j��lD���0Mik�`�a�˰āb��D������n : ԕ��A��L�e�]� Z���T�-� � f� isolated from four different continents over a 38 year period. 21 �� f��H�ÍL�%�����`#�����NA����_(3��{a��*LV�Z��Ҹ�?ɍ�d%9[Y�� A recombinant fowlpox vaccine with an H5 hemagglutinin gene insert protected chickens against clinical signs and death following challenge by nine different highly pathogenic H5 avian influenza viruses. �=u�p��DH�u��kդ�9pR��C��}�F�:`����g�K��y���Q0=&���KX� �pr ֙��ͬ#�,�%���1@�2���K� �'�d���2� ?>3ӯ1~�>� ������Eǫ�x���d��>;X\�6H�O���w~� @����~O�����C֯ D�*)k V�Bl��Pv��hU Z �څ0}����c �f;-�;��l��A�#k )�;Կ�E�Б ���� The antibody titers correlated with the mortality protection rates (R² = 0.86, p < 0.007) of 60, 50, 20 and 0 percent of birds respectively against challenge on 14 days post challenge (dpc). Access scientific knowledge from anywhere. This thesis work is focussed on the viral glycoprotein of parainfluenza virus type 2 (hPIV-2), parainfluenza virus type 5 (PIV-5), and the fusion glycoprotein of human Metapneumovirus (hMPV).The first part of this project was the characterization of a mutation observed in the F protein natural variants of hPIV-2.

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