Immunogenic compositions that include a bacterial capsular polysaccharide conjugated to a carrier protein are described. In some embodiments, the bacterial capsular polysaccharide is a Neisseria meningitidis capsular polysaccharide. The carrier protein includes an N. meningitidis factor H binding protein (fHbp) linked to cholera toxin subunit B (CTB). Administration of the immunogenic compositions elicits an immune response that includes production of meningococcal polysaccharide-specific and fHbp-specific antibodies. Use of the immunogenic compositions as meningococcal vaccines is also described.

The present disclosure relates to nanoparticle compositions for use as vaccines against Clostridium perfringens in poultry which causes necrotic enteritis in poultry. Such compositions include one or more Clostridium perfringens extracellular proteins entrapped in a polyanhydride or chitosan nanoparticle. The one or more Clostridium perfringens extracellular proteins may include one or more Clostridium perfringens toxins, such as, for example, alpha toxin (CPA), beta toxin (CPB), epsilon toxin (ETX), iota toxin (ITX), perfringolysin O (PFO), enterotoxin (CPE), beta2 toxin (CPB2), or NetB toxin. In some aspects, the composition further includes a Salmonella enteritidis flagellar protein. The present invention also includes methods for the oral delivery of one or more Clostridium perfringens extracellular proteins to the mucosal membrane of the intestinal tract of a bird of the order Galliformes.

A prokaryotic expression system or a recombinant adenovirus system is used to highly efficiently express VZV envelope gE glycoprotein and the flagellin fusion protein thereof. The produced recombinant gE protein, gE flagellin fusion protein and recombinant adenovirus vector, or composition thereof is used to immunize a mouse so as to promote the body to generate gE and VZV-specific antibody titer, as well as gE-specific and VZV-specific cell immunity.

The present invention relates to vaccine compositions based on Gram-negative outer membrane vesicles displaying antigens of pathogens expressed as part of a fusion protein comprising N-terminal parts of surface expressed lipoproteins of Gram-negative bacteria, and use of such compositions in vaccination. The invention further relates to the fusion lipoproteins comprising N-terminal parts of surface expressed lipoproteins of Gram-negative bacteria and antigens of pathogens fused thereto, DNA constructs and bacterial host cells for expressing these fusion lipoproteins and to methods for producing outer membrane vesicles displaying the fusion lipoproteins.

The present invention relates to novel hybrid peptides developed from the combination of membrane surface protein peptide fragments present in anaplasmosis microorganisms, and in particular, bacteria of the species Anaplasma marginale. The present invention further relates to hybrid peptide sets, compositions and kits comprising such novel hybrid peptides, their uses and methods of inducing immune response. Each hybrid peptide, according to the present invention, comprises two or more peptide fragments of amino acid sequences as defined in the present invention linked together by means of a spacer element. The combined peptide fragments are protein peptide fragments of MSP1, MSP1a, MSP1b, MSP2, MSP2-HRV, MSP3, OMP7, OMP8, VirB9 and VirB10.

The present invention includes an immunogenic protein, nucleic acid, plant and immunization comprising a fusion protein that has at least 90% amino acid identity to an amino acid sequence of a modified thermostable lichenase (LicKM) polypeptide as set forth in SEQ ID NO:9, wherein the LicKM polypeptide comprises an N-terminus, a C-terminus, and an inner loop region, and wherein a Receptor Binding Domain (RBD) or a Receptor Binding Motif (RBM) of a coronavirus spike protein is positioned at, at least one of, the N-terminus, the C-terminus, or in a loop region of the LicKM polypeptide.

The invention relates to isolated Streptococcus pneumoniae serotype 15B capsular polysaccharide and processes for their preparation. The invention also relates to immunogenic conjugates comprising Streptococcus pneumoniae serotype 15B capsular polysaccharide covalently linked to a carrier protein, processes for their preparation and immunogenic compositions comprising them.

Immunogenic compositions that include a bacterial capsular polysaccharide conjugated to a carrier protein are described. In some embodiments, the bacterial capsular polysaccharide is a Neisseria meningitidis capsular polysaccharide. The carrier protein includes an N. meningitidis factor H binding protein (fHbp) linked to cholera toxin subunit B (CTB). Administration of the immunogenic compositions elicits an immune response that includes production of meningococcal polysaccharide-specific and fHbp-specific antibodies. Use of the immunogenic compositions as meningococcal vaccines is also described.

Outer membrane vesicles from bacteria of the Burkholderia pseudomallei complex can be 5 used as adjuvants in compositions and methods to potentiate the immune response to immunogens.

The present disclosure provides vaccines or immunogenic compositions against clinical signs, symptoms, and losses attributable to or caused by infection with PEDV and/or ETEC. Antigenic epitopes from PEDV and ETEC are used to construct an immunogenic composition, preferably in the form of a multi-epitope fusion antigen or as a live strain through E. coli.