The present invention relates to a composition comprising dry extract of intestinal content of adult chickens lyophilised by spray technique and tyndallised in batch mode, the use thereof as a food supplement and the use thereof to stimulate the immune system.

The present invention relates to a composition comprising dry extract of intestinal content of adult chickens lyophilised by spray technique and tyndallised in batch mode, the use thereof as a food supplement and the use thereof to stimulate the immune system.

The present invention regards a new recombinant HVT (rHVT) construct, useful as multivalent vector vaccine for poultry. The rHVT comprises 4 heterologous genes from poultry pathogens: the VP2 gene from IBDV, the F gene from NDV, and the gD and gI genes from ILTV. The VP2 and F genes are inserted in the Us genome region of the rHVT. The gD-gI genes are inserted in the UL genome region, between the UL54 and the LORF3 genes. The new rHVT-VP2-F-gD-gI proved to be genetically stable in vitro and in vivo, and expressed all inserted genes well. Also it was an effective vaccine against severe challenge infections with NDV, IBDV, and ILTV.

The present invention regards a new recombinant HVT (rHVT) construct, useful as multivalent vector vaccine for poultry. The rHVT comprises 4 heterologous genes from poultry pathogens: the VP2 gene from IBDV, the F gene from NDV, and the gD and gI genes from ILTV. The VP2 and F genes are inserted in the Us genome region of the rHVT. The gD-gI genes are inserted in the UL genome region, between the UL54 and the LORF3 genes. The new rHVT-VP2-F-gD-gI proved to be genetically stable in vitro and in vivo, and expressed all inserted genes well. Also it was an effective vaccine against severe challenge infections with NDV, IBDV, and ILTV.

The present invention relates recombinant viruses and the uses thereof. More particularly, the invention relates to novel recombinant Marek's disease viruses encoding polypeptide(s) of interest, and their use to express or deliver such polypeptides to animals, particularly poultry. The invention is particularly suited to vaccinate poultry against avian pathogens.

The present invention relates recombinant viruses and the uses thereof. More particularly, the invention relates to novel recombinant Marek's disease viruses encoding polypeptide(s) of interest, and their use to express or deliver such polypeptides to animals, particularly poultry. The invention is particularly suited to vaccinate poultry against avian pathogens.