The present invention discloses a conjugate comprising an antigen (for example a saccharide antigen) covalently linked to a Pseudomonas aeruginosa PcrV carrier protein comprising an amino acid sequence which is at least 80% identical to the sequence of SEQ ID NO:1-4, wherein the antigen is linked (either directly or through a linker) to an amino acid residue of the P. aeruginosa PcrV carrier protein. The invention also discloses Pseudomonas aeruginosa PcrV proteins that contain glycosylation site consensus sequences.

The present invention discloses a conjugate comprising an antigen (for example a saccharide antigen) covalently linked to a Pseudomonas aeruginosa PcrV carrier protein comprising an amino acid sequence which is at least 80% identical to the sequence of SEQ ID NO:1-4, wherein the antigen is linked (either directly or through a linker) to an amino acid residue of the P. aeruginosa PcrV carrier protein. The invention also discloses Pseudomonas aeruginosa PcrV proteins that contain glycosylation site consensus sequences.

Immunogenic proteins from Moraxella catharrhalis as well as nucleic acids, vectors and transformed cells useful for expression of the proteins. Methods for prophylaxis of infection with Moraxella catharrhalis using the proteins, nucleic acids, vectors or transformed cells.

Disclosed herein is an attenuated Acinetobacter baumannii comprising an expression vector comprising a nucleic acid encoding the ABUW_1645 protein or a variant thereof. Disclosed herein are methods of treating or preventing colonization, infection, or disease by an Acinetobacter baumannii microbe, the method comprising administering a clinically effective dose of the attenuated Acinetobacter baumannii to a subject in need thereof, wherein the attenuated Acinetobacter baumannii comprises an expression vector expressing the ABUW_1645 protein or variants thereof.

Non-naturally occurring vesicles derived from bacteria, e.g., pathogenic bacteria, methods for making the vesicles, and methods for using compositions of these vesicles are disclosed. Methods of using the vesicles include prevention and/or treatment of bacterial infections. Also provided herein are compositions that include vesicles derived front bacteria and tumor vesicles, methods for making the tumor vesicles, and methods for using the compositions of bacterial vesicles and tumor vesicles. Methods of using the compositions of bacterial vesicles and tumor vesicles include treatment of cancer in a subject. Tumor vesicles may be derived from cancer cells present in the subject to be treated or from a cancer cell line expressing at least one neoantigen. The neoantigen may be specific to the subject and may have been identified by sequencing of the cancer cells from the subject. The neoantigen may be a neoantigen known to be commonly expressed in a particular type of cancer.

Non-naturally occurring vesicles derived from bacteria, e.g., pathogenic bacteria, methods for making the vesicles, and methods for using compositions of these vesicles are disclosed. Methods of using the vesicles include prevention and/or treatment of bacterial infections. Also provided herein are compositions that include vesicles derived front bacteria and tumor vesicles, methods for making the tumor vesicles, and methods for using the compositions of bacterial vesicles and tumor vesicles. Methods of using the compositions of bacterial vesicles and tumor vesicles include treatment of cancer in a subject. Tumor vesicles may be derived from cancer cells present in the subject to be treated or from a cancer cell line expressing at least one neoantigen. The neoantigen may be specific to the subject and may have been identified by sequencing of the cancer cells from the subject. The neoantigen may be a neoantigen known to be commonly expressed in a particular type of cancer.

The invention provides peptides derived from a ubiquitous protein, and nucleic acids encoding such peptides. The invention extends to various uses of these peptides and nucleic acids, for example, as antigens for use in vaccines per se and in the generation of antibodies for use in therapeutic drugs for the prevention, amelioration or treatment of infections caused by sepsis-inducing bacteria. The invention particularly benefits immunocompromised hosts such as neonates, babies, children, women of fertile age, pregnant women, foetuses, the elderly and diabetics.

The invention provides peptides derived from a ubiquitous protein, and nucleic acids encoding such peptides. The invention extends to various uses of these peptides and nucleic acids, for example, as antigens for use in vaccines per se and in the generation of antibodies for use in therapeutic drugs for the prevention, amelioration or treatment of infections caused by sepsis-inducing bacteria. The invention particularly benefits immunocompromised hosts such as neonates, babies, children, women of fertile age, pregnant women, foetuses, the elderly and diabetics.

Disclosed are immunogenic proteins from Pseudomonas aeruginosa as well as nucleic acids, vectors and transformed cells useful for expression of the proteins. Also disclosed are methods for prophylaxis of infection with Pseudomonas aeruginosa using the proteins, nucleic acids, vectors or transformed cells.

Disclosed are immunogenic proteins from Pseudomonas aeruginosa as well as nucleic acids, vectors and transformed cells useful for expression of the proteins. Also disclosed are methods for prophylaxis of infection with Pseudomonas aeruginosa using the proteins, nucleic acids, vectors or transformed cells.