Abstract: The present invention discloses novel recombinant multivalent non-pathogenic Marek's Disease virus constructs that encode and express both Infectious Laryngotracheitis Virus protein antigens and an Infectious Bursal Disease virus protein antigen, and methods of their use in poultry vaccines.

Abstract: The present invention regards recombinant HVT (rHVT) constructs, useful as multivalent vector vaccine for poultry. The rHVT comprise 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, either between UL44 and UL45, or between UL45 and UL46. The rHVTs proved to be genetically stable in vitro and in vivo, and expressed all inserted genes well enough to induce protective immunity in vaccinated poultry against IBDV, NDV, and ILTV.

Abstract: The present invention relates to vaccines against influenza virus infection or disease for targets with pre-existing antibodies against influenza virus HA head domain. The invention regards a recombinant vector expressing a HA stem polypeptide, a vaccine comprising the vector or a host cell with said vector, uses of the vector, the host cell, or the vaccine, and methods for reducing influenza virus infection or disease. The recombinant vector can be a nucleic acid such as a eukaryotic expression plasmid or an RNA, a virus, or a replicon particle (RP). This vaccination allows for the induction of an early- and effective immune-response against Influenza virus induced infection or disease, not hindered by pre-existing anti-HA head domain antibodies.

Abstract: The present invention discloses novel recombinant multivalent non-pathogenic Marek's Disease virus constructs that encode and express both Infectious Laryngotracheitis Virus protein antigens and an Infectious Bursal Disease virus protein antigen, and methods of their use in poultry vaccines.

Abstract: The present invention describes a recombinant herpesvirus of turkeys (rHVT) that can be used as a vector vaccine for poultry against infection and disease from multiple poultry pathogens. Specifically the rHVT expresses an infectious bursal disease virus (IBDV) viral protein 2 (VP2) gene and a Newcastle disease virus (NDV) fusion (F) protein gene from a first and a second expression cassette inserted in the unique small (Us) region, and expresses an avian influenza vims (AIV) haemagglutinin (HA) gene from a third expression cassette inserted in the unique long (UL) region of the genome of said rHVT either between the UL40 and UL41 genes, or between the UL44 and UL45 genes. This rHVT can be used to vaccinate poultry against MDV, IBDV, NDV and AIV.

Abstract: The present invention discloses novel recombinant multivalent non-pathogenic Marek's Disease virus constructs that encode and express both Infectious Laryngotracheitis Virus protein antigens and an Infectious Bursal Disease virus protein antigen, and methods of their use in poultry vaccines.

Abstract: The present invention relates to the use of a diluent for the in-use stabilisation of cells infected with a cell-associated alphaherpesvirus. Contrary to the long-standing practice of incorporating a considerable amount of peptone into the diluent for such virus-infected cells, it was found that a reduction of the amount of protein in the diluent improved the in-use stability of alphaherpesvirus-infected cells. Whereby the best stability was even obtained using a protein-free diluent. This effect was especially pronounced for recombinant HVT viruses expressing a heterologous insert. Being protein-free is highly advantageous for the production of the diluent, in respect of costs, safety, and consistency of production.

Abstract: The present invention relates to the use of a diluent for the in-use stabilisation of cells infected with a cell-associated alphaherpesvims. Contrary to the long-standing practice of incorporating a considerable amount of peptone into the diluent for such virus-infected cells, it was found that a reduction of the amount of protein in the diluent improved the in-use stability of alphaherpesvirus-infected cells. Whereby the best stability was even obtained using a protein-free diluent. This effect was especially pronounced for recombinant HVT viruses expressing a heterologous insert. Being protein-free is highly advantageous for the production of the diluent, in respect of costs, safety, and consistency of production.

Abstract: The present invention regards a new and Improved HVT-vectored ND-IBD vaccine, comprising a recombinant HVT comprising the VP2 gene from IBDV and the F gene from NDV to a target animal. The recombinant HVT can be used in a vaccine for poultry, which displayed good viral vector replication, effective expression of the NDV F- and IBDV VP2 genes, improved immunoprotection against ND and IBD, and improved genetic stability over prior art constructs.

Abstract: The present invention regards a new and Improved HVT-vectored ND-IBD vaccine, comprising a recombinant HVT comprising the VP2 gene from IBDV and the F gene from NDV to a target animal. The recombinant HVT can be used in a vaccine for poultry, which displayed good viral vector replication, effective expression of the NDV F—and IBDV VP2 genes, improved immunoprotection against ND and IBD, and improved genetic stability over prior art constructs.

Abstract: The present invention relates to the field of veterinary vaccines, in particular to that of vector vaccines for poultry based on recombinant nonpathogenic Marek's disease virus (npMDV). The recombinant npMDV of the invention expresses stably and effectively two heterologous genes each originating from a different micro-organism: the fusion protein gene from Newcastle disease virus, and the viral protein 2 gene from infectious bursal disease virus. A vaccine based on this recombinant npMDV can be used to induce in poultry a protective immune response not only against Marek's disease, but also against Newcastle disease and Infectious bursal disease. The invention also relates to methods and uses involving the recombinant npMDV, expression cassette, infected host cells, and vaccines.

Abstract: The present application applies to the field of veterinary vaccines, in particular of vaccines for poultry against avian influenza. The vaccine is based on a recombinant viral vector expressing the haemagglutinin protein of an influenza virus, wherein the vector is herpes virus of turkeys (HVT) and the haemagglutinin gene is driven by a glycoprotein B gene promoter from a mammalian herpesvirus. A vaccine comprising this HVT+HA vector can be used to induce a protective immune response against avian influenza in poultry, and to reduce the spread of AIV. The invention also relates to methods, uses, and vaccines involving the HVT+HA vector.

Abstract: The present invention relates to the field of veterinary vaccines, in particular to that of vector vaccines for poultry based on recombinant nonpathogenic Marek's disease virus (npMDV). The recombinant npMDV of the invention expresses stably and effectively two heterologous genes each originating from a different micro-organism: the fusion protein gene from Newcastle disease virus, and the viral protein 2 gene from infectious bursal disease virus. A vaccine based on this recombinant npMDV can be used to induce in poultry a protective immune response not only against Marek's disease, but also against Newcastle disease and Infectious bursal disease. The invention also relates to methods and uses involving the recombinant npMDV, expression cassette, infected host cells, and vaccines.

Abstract: The present application applies to the field of veterinary vaccines, in particular of vaccines for poultry against avian influenza. The vaccine is based on a recombinant viral vector expressing the haemagglutinin protein of an influenza virus, wherein the vector is herpes virus of turkeys (HVT) and the haemagglutinin gene is driven by a glycoprotein B gene promoter from a mammalian herpesvirus. A vaccine comprising this HVT+HA vector can be used to induce a protective immune response against avian influenza in poultry, and to reduce the spread of AIV. The invention also relates to methods, uses, and vaccines involving the HVT+HA vector.

Abstract: The present invention relates to the fields of veterinary virology and immunology. In particular the invention relates to a novel avian Astrovirus; to antibodies or fragments thereof against the novel virus; to antigenic preparations, proteins, and DNA molecules of the novel avian Astrovirus; to vaccines of the novel virus or its antigenic preparations, protein, or DNA; to methods for the manufacture of such vaccines, and to diagnostic kits.

Abstract: The present invention relates to the fields of veterinary virology and immunology. In particular the invention relates to a novel avian Astrovirus; to antibodies or fragments thereof against the novel virus; to antigenic preparations, proteins, and DNA molecules of the novel avian Astrovirus; to vaccines of the novel virus or its antigenic preparations, protein, or DNA; to methods for the manufacture of such vaccines, and to diagnostic kits.