The present invention relates to compositions including an isolated non-pyruvylated non-lipidated ORF2086 polypeptide, and methods thereof. In an exemplary embodiment, the compositions described herein are immunogenic. The present invention further relates to compositions that elicit a bactericidal immune response in a mammal against an ORF2086 subfamily B polypeptide from serogroup B Neisseria meningitidis, and methods related thereto.

The present invention relates to compositions including an isolated non-pyruvylated non-lipidated ORF2086 polypeptide, and methods thereof. In an exemplary embodiment, the compositions described herein are immunogenic. The present invention further relates to compositions that elicit a bactericidal immune response in a mammal against an ORF2086 subfamily B polypeptide from serogroup B Neisseria meningitidis, and methods related thereto.

The invention uses ELISA or similar assays for analysing a meningococcal vaccine. The assay uses antibodies which bind to meningococcal proteins within the vaccine, and in particular monoclonal antibodies which are bactericidal for meningococcus and/or which recognise conformational epitopes within the meningococcal proteins. By performing the assay on a series of dilutions of a test vaccine, and by comparing the results with those obtained using a reference vaccine of known potency, it is possible to determine the relative potency of the test vaccine. This value can be used as a parameter for determining whether a manufactured batch of a vaccine is suitable for release to the public, or whether it has experienced a production failure and so should not be used.

The invention uses ELISA or similar assays for analysing a meningococcal vaccine. The assay uses antibodies which bind to meningococcal proteins within the vaccine, and in particular monoclonal antibodies which are bactericidal for meningococcus and/or which recognise conformational epitopes within the meningococcal proteins. By performing the assay on a series of dilutions of a test vaccine, and by comparing the results with those obtained using a reference vaccine of known potency, it is possible to determine the relative potency of the test vaccine. This value can be used as a parameter for determining whether a manufactured batch of a vaccine is suitable for release to the public, or whether it has experienced a production failure and so should not be used.

Novel methods for exporting target proteins from the cytosol to the extracellular surface of bacterial cells are provided. The methods are useful in that they permit the preparation of vaccines for the prevention of bacterial infectious diseases.

Novel methods for exporting target proteins from the cytosol to the extracellular surface of bacterial cells are provided. The methods are useful in that they permit the preparation of vaccines for the prevention of bacterial infectious diseases.

The present disclosure relates generally to methods of preparing glycoconjugates containing a saccharide conjugated to a carrier protein by use of stable nitroxyl radical related agent/oxidant as an oxidizing agent, to immunogenic compositions comprising such glycoconjugates, and to methods for the use of such glycoconjugates and immunogenic compositions.

The present disclosure relates generally to methods of preparing glycoconjugates containing a saccharide conjugated to a carrier protein by use of stable nitroxyl radical related agent/oxidant as an oxidizing agent, to immunogenic compositions comprising such glycoconjugates, and to methods for the use of such glycoconjugates and immunogenic compositions.

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.

Disclosed herein are methods for assaying whether a given Neisseria species, such as a given Neisseria gonorrhoeae strain, is susceptible to a cefixime compound and treatment methods based on the assay results.