The invention relates to a multivalent Shigella/Enterotoxigenic Escherichia coli vaccine for use in prophylaxis and treatment of diarrheal disease. The Shigella-ETEC vaccine provides increased coverage of a broader range of ETEC and Shigella isolates than prior vaccines, and includes CS14 antigens and serotypes (S. flexneri 7a, or S. flexneri 1b).

The present invention relates to a Salmonella typhi Ty21a strain comprising a DNA molecule comprising at least one eukaryotic expression cassette encoding at least one tumor antigen, stroma antigen and/or checkpoint inhibitor antigen for the use in the treatment of cancer in a human subject following treatment with an antibiotic, wherein the Salmonellatyphi Ty21a strain is to be administered orally and optionally in combination with a checkpoint inhibitor.

Disclosed herein are nucleic acids, vector systems, and vaccines for vaccinating fresh water and marine fish using Ichthyophthirius multifiliis (Ich) i-antigens. In particular, a recombinant attenuated Edwardsiella vaccine (RAEV) vector system is disclosed with regulated delayed attenuation and regulated delayed lysis in vivo attributes that synthesizes Ich protective antigens to enable vaccination of fresh water and marine fish species susceptible to white spot disease. This vaccine construct is designed to exhibit the invasive properties of virulent Edwardsiella at the time of bath immunization and then is programmed to gradually lose virulence attributes and to synthesize protective antigens as a consequence of in vivo cell division as the RAEV colonizes internal effector lymphoid tissues. The ultimate lysis in vivo delivers a bolus of protective antigen along with immunostimulatory molecules to exhibit complete biological containment with no potential for survival in vivo or ex vivo.

The present invention relates to an attenuated strain of Salmonella comprising at least one copy of a DNA molecule comprising an expression cassette encoding Wilms' Tumor Protein (WT1), for use in the treatment of cancer, wherein the treatment further comprises the administration of at least one checkpoint inhibitor, particularly selected from at least one antibody against PD-1, PD-L1, CTLA-4, IDO, OX-40, GITR, TIM-3, and LAG-3. The present invention further relates to a pharmaceutical composition comprising an attenuated strain of Salmonella comprising at least one copy of a DNA molecule comprising an expression cassette encoding WT1 for use in the treatment of cancer, wherein the treatment further comprises the administration of at least one checkpoint inhibitor, particularly selected from at least one antibody against PD-1, PD-L1, CTLA-4, IDO, OX-40, GITR, TIM-3, and LAG-3.

The present invention relates to adenoviral vectors, wherein the viral capsid has been coated with polypeptides, which are capable of stimulating a peptide-specific immune response in a subject and uses thereof (e.g. infectious disease). Furthermore, the present invention relates to methods of treating diseases, e.g., cancer or an infectious disease, by adenoviral vectors which have been coated by polypeptides causing peptide-specific immune response. Also the present invention relates to a method of coating adenoviral vectors by specific peptides as well as to a method of identifying those peptides suitable for coating the capsid of an adenoviral vector.

Described herein is a Mycobacterium mutant, comprising at least one mutation in at least one gene sequence encoding global gene regulators (GGRs) selected from the group consisting of sigH, sigL, sigE, ECF-1, and mixtures thereof, wherein the GGR gene is at least partially inactivated. Described herein also is a vaccine based on the mutant and a method of differentiating between subjects that have been infected with Mycobacterium and subjects that have not been infected with Mycobacterium or have been vaccinated with a Mycobacterium vaccine.

Vaccines for preventing or treating diabetes, obesity and complications thereof are provided. The vaccines comprise at least one active agent such as attenuated Porphyromonas gingivalis, inactivated Porphyromonas gingivalis, a subunit of Porphyromonas gingivalis, a recombinant or isolated immunogenic polypeptide or peptide from Porphyromonas gingivalis or a cDNA from Porphyromonas gingivalis.

The present invention provides compositions and methods of inducing an immune response in a subject in need thereof, comprising administering to the subject an immunologically-effective amount of a live Salmonella typhi vector, wherein the Salmonella typhi vector has been engineered to express one or more antigens; an outer membrane folding protein Barn A or a fragment or variant thereof; and a lipid A deacylase PagL or a fragment or variant thereof, wherein the Salmonella typhi vector is capable of delivering the antigen to a mucosal tissue via an outer membrane vesicle when administered to a subject.

The present disclosure is directed to a multi-species prion protein or peptide thereof, and vaccine compositions comprising the same that are useful for the vaccination and treatment of mammalian subjects at risk of having or having prion disease. Also disclosed herein are isolated proteins and peptides, polymers, vaccines, animal bait or feed, antibodies, and methods of inhibiting the onset of or treating a prion disease.

Disclosed are a non-integrative Listeria-based vaccine and a method for inducing antitumor immune response. In particular, the present disclosure provides a recombinant nucleic acid molecule, a recombinant plasmid or a recombinant expression vector comprising the recombinant nucleic acid molecule, a recombinant protein, and a recombinant Listeria. Also disclosed are a pharmaceutical composition and a vaccine comprising the above component, a method for slowly and continuously killing cells using the same, and a method for inducing immune response in a subject using the same.