Abstract: The present application relates to immunogenic compositions comprising a mixture of staphylococcal antigens which combines antigen having different functions, for instance, combinations including a staphylococcal extracellular component binding protein and a staphylococcal transporter protein or a staphylococcal extracellular component binding protein and a staphylococcal regulator of virulence or toxin or a staphylococcal transporter protein and a staphylococcal regulator of virulence or toxin. Vaccines, methods of treatment, uses of and processes to make a staphylococcal vaccine are also described.

Abstract: The present application relates to immunogenic compositions comprising a mixture of staphylococcal antigens which combines antigen having different functions, for instance, combinations including a staphylococcal extracellular component binding protein and a staphylococcal transporter protein or a staphylococcal extracellular component binding protein and a staphylococcal regulator of virulence or toxin or a staphylococcal transporter protein and a staphylococcal regulator of virulence or toxin. Vaccines, methods of treatment, uses of and processes to make a staphylococcal vaccine are also described.

Abstract: The present invention relates to the field of novel, engineered Gram-negative bacterial strains that have improved outer-membrane vesicle shedding properties, and vaccine compositions comprising these bacteria or vesicles. The present invention provides a hyperblebbing Gram-negative bacterium which has been genetically modified by either or both processes selected from a group consisting of: down-regulation of expression of one or more tol genes; and mutation of one or more gene(s) encoding a protein comprising a peptidoglycan-associated site to attenuate the peptidoglycan-binding activity of the protein(s).