A recombinant BHV-1 oncolytic virus is provided comprising a BHV-1 mutant with enhanced cancer selectivity and/or enhance immunostimulatory activity as compared to wildtype BHV-1. The BHV-1 mutant is genetically modified to express one or more immunomodulatory molecules that induce an anti-tumor immune response. A method of generating the recombinant BHV-1 oncolytic virus is also provided.

Methods of producing a pathogen with reduced replicative fitness are disclosed, as are attenuated pathogens produced using the methods. In particular examples, the method includes deoptimizing one or more codons in a coding sequence, thereby reducing the replicative fitness of the pathogen. Methods of using the attenuated pathogens as immunogenic compositions are also disclosed.

Methods of producing a pathogen with reduced replicative fitness are disclosed, as are attenuated pathogens produced using the methods. In particular examples, the method includes deoptimizing one or more codons in a coding sequence, thereby reducing the replicative fitness of the pathogen. Methods of using the attenuated pathogens as immunogenic compositions are also disclosed.

Methods of producing a pathogen with reduced replicative fitness are disclosed, as are attenuated pathogens produced using the methods. In particular examples, the method includes deoptimizing one or more codons in a coding sequence, thereby reducing the replicative fitness of the pathogen. Methods of using the attenuated pathogens as immunogenic compositions are also disclosed.

The present invention relates to the field of (vector) vaccines, and especially to novel EHV's having an inactivation of UL18 and/or UL8. The present invention further concerns related expression cassettes and vectors, which are suitable to express genes of interest, especially antigen encoding sequences. The viral vectors of the present invention are useful for producing an immunogenic composition or vaccine.

Methods of producing a pathogen with reduced replicative fitness are disclosed, as are attenuated pathogens produced using the methods. In particular examples, the method includes deoptimizing one or more codons in a coding sequence, thereby reducing the replicative fitness of the pathogen. Methods of using the attenuated pathogens as immunogenic compositions are also disclosed.

Methods of producing a pathogen with reduced replicative fitness are disclosed, as are attenuated pathogens produced using the methods. In particular examples, the method includes deoptimizing one or more codons in a coding sequence, thereby reducing the replicative fitness of the pathogen. Methods of using the attenuated pathogens as immunogenic compositions are also disclosed.

The present invention provides an attenuated strain of porcine pseudorabies virus (PRV), in which said attenuated strain of PRV is a variant strain of PRV with inactivation of gI/gE/11K/28K proteins. In addition, the present invention also provides a vaccine composition comprising the attenuated strain of PRV as an antigen, a preparation method and use thereof. Proved by immunogenicity and pathogenicity testing of the live vaccine, said live PRV vaccine can provide a good protection for pigs with no clinical signs observed, indicating excellent immune protection.

The invention relates to a Quadruple Gene Deleted Mutant Bovine Herpesvirus Type 1 (BHV-1 QMV) engineered to express protective antigens derived from viruses associated with infection in livestock. The recombinant vector includes a deletion of a cytoplasmic tail of envelope glycoprotein gE (gE-CT), a truncation of glycoprotein gG, a deletion of envelope protein UL49.5 amino acid residues 30-32, and a deletion of UL49.5 cytoplasmic tail amino acid residues 80-96. The truncation of glycoprotein gG comprises a deletion of amino-terminal amino acid residues 1-67. The recombinant vector can include at least two heterologous antigens inserted therein. Included are methods for creating recombinant vectors, mutant viruses, and vaccines for preventing or reducing symptoms associated with viral infection in livestock, in particular bovine respiratory viral infection

The present invention relates to the field of (vector) vaccines, and especially to novel EHV's having an inactivation of UL18 and/or UL8. The present invention further concerns related expression cassettes and vectors, which are suitable to express genes of interest, especially antigen encoding sequences. The viral vectors of the present invention are useful for producing an immunogenic composition or vaccine.