Abstract: The present disclosure relates to an immunogenic composition comprising a combination of meningococcal antigens which comprises at least one factor H binding protein (fHBP) A protein, at least one fHBP B protein, at least one Neisseria adhesin A (NadA) protein, and at least one detergent-extracted Outer Membrane Vesicle (dOMV). The meningococcal antigens may be from a Neisseria meningitidis serogroup B. The combination of antigens provided a broad coverage of bacteria strains. Further, the present disclosure relates to the use of the immunogenic composition in methods for eliciting an immune response.

Abstract: The invention relates to a conjugate of a saccharide covalently bound to a carrier protein, wherein the saccharide comprises repetitive units of 1,5 ribitol phosphate in which all the ribitol residues are substituted by N-acetyl D-glucosaminyl residues at the 4-position, and wherein said N-acetyl D-glucosaminyl residues are exclusively in anomeric configuration ? or are exclusively in anomeric configuration ? and wherein the carrier protein provides at least one epitope to the conjugate which is recognized by T helper lymphocytes.

Abstract: The invention especially relates to multivalent vaccine compositions that can treat or prevent at least 60, preferably 75% of infections caused by Neisseria meningitidis especially of serogroup B. To this end, the invention in particular provides a lipooligosaccharide (LOS) of N. meningitidis in particular constituted by a lipid A, an inner core, an ? chain of L6 or L8 type, in which the heptose II residue of the inner core bears in position O-3 and in position O-6 or O-7 a phosphoethanolamine (PEA) substituent, and also to the construction of the strain of N. meningitidis that is capable of expressing such an LOS. The invention also relates to a strain of N. meningitidis of serogroup A that bears a lipooligosaccharide (LOS) in particular constituted by a lipid A, an inner core, an ? chain of L6 type, in which the heptose II residue of the inner core bears in position O-3 a phosphoethanolamine (PEA) substituent and does not bear a PEA substituent in positions O-6 and O-7.

Abstract: The invention relates to immunogenic compositions comprising at least two Neisseria meningitidis (Nm) protein antigens selected from the group consisting of a trypsin-like serine protease auto-transporter antigen such as IgAI P, App or AusI antigen, a NalP antigen and a TbpB antigen. Preferably, the composition of the invention comprises (i) the trypsin-like serine protease auto-transporter antigen and (ii) the NalP antigen and/or TbpB antigen.

Abstract: The invention especially relates to multivalent vaccine compositions that can treat or prevent at least 60, preferably 75% of infections caused by Neisseria meningitidis especially of serogroup B. To this end, the invention in particular provides a lipooligosaccharide (LOS) of N. meningitidis in particular constituted by a lipid A, an inner core, an ? chain of L6 or L8 type, in which the heptose II residue of the inner core bears in position O-3 and in position O-6 or O-7 a phosphoethanolamine (PEA) substituent, and also to the construction of the strain of N. meningitidis that is capable of expressing such an LOS. The invention also relates to a strain of N. meningitidis of serogroup A that bears a lipooligosaccharide (LOS) in particular constituted by a lipid A, an inner core, an ? chain of L6 type, in which the heptose II residue of the inner core bears in position O-3 a phosphoethanolamine (PEA) substituent and does not bear a PEA substituent in positions O-6 and O-7.

Abstract: The invention relates to a conjugate of a saccharide covalently bound to a carrier protein, wherein the saccharide comprises repetitive units of 1,5 ribitol phosphate in which all the ribitol residues are substituted by N-acetyl D-glucosaminyl residues at the 4-position, and wherein said N-acetyl D-glucosaminyl residues are exclusively in anomeric configuration ? or are exclusively in anomeric configuration ? and wherein the carrier protein provides at least one epitope to the conjugate which is recognized by T helper lymphocytes.

Abstract: The present invention relates to novel polypeptides derived from meningitis proteins, in particular auto-transporters of the subtilinase subclass, and their use in vaccines and vaccine compositions for the prevention and/or treatment of meningitis and meningococcal infections.

Abstract: The invention relates to immunogenic compositions comprising at least two Neisseria meningitidis (Nm) protein antigens selected from the group consisting of a trypsin-like serine protease auto-transporter antigen such as IgAI P, App or AusI antigen, a NalP antigen and a TbpB antigen. Preferably, the composition of the invention comprises (i) the trypsin-like serine protease auto-transporter antigen and (ii) the NalP antigen and/or TbpB antigen.

Abstract: The present invention relates to novel polypeptides derived from Neisseria meningitidis proteins, in particular auto-transporters of the trypsin-like serine protease subclass, such as IgA1P, App and AusI, and their use in immunogenic compositions i.a., vaccine compositions for the prevention and/or treatment of meningococcal infections. In particular, it provides fragments of IgA1P, App and AusI and polypeptides comprising or consisting of these fragments and fusions thereof, which may be used in immunogenic compositions, for example vaccine compositions.

Abstract: The invention especially relates to multivalent vaccine compositions that can treat or prevent at least 60, preferably 75% of infections caused by Neisseria meningitidis especially of serogroup B. To this end, the invention in particular provides a lipooligosaccharide (LQS) of N. meningitidis in particular constituted by a lipid A, an inner core, an ? chain of L6 or L8 type, in which the heptose II residue of the inner core bears in position O-3 and in position O-6 or O-7 a phosphoethanolamine (PEA) substituent, and also to the construction of the strain of N. meningitidis that is capable of expressing such an LOS. The invention also relates to a strain of N. meningitidis of serogroup A that bears a lipooligosaccharide (LOS) in particular constituted by a lipid A, an inner core, an ? chain of L6 type, in which the heptose II residue of the inner core bears in position O-3 a phosphoethanolamine (PEA) substituent and does not bear a PEA substituent in positions O-6 and O-7.

Abstract: The invention especially relates to multivalent vaccine compositions that can treat or prevent at least 60, preferably 75% of infections caused by Neisseria meningitidis especially of serogroup B. To this end, the invention in particular provides a lipooligosaccharide (LOS) of N. meningitidis in particular constituted by a lipid A, an inner core, an ? chain of L6 or L8 type, in which the heptose II residue of the inner core bears in position O-3 and in position O-6 or O-7 a phosphoethanolamine (PEA) substituent, and also to the construction of the strain of N. meningitidis that is capable of expressing such an LOS. The invention also relates to a strain of N. meningitidis of serogroup A that bears a lipooligosaccharide (LOS) in particular constituted by a lipid A, an inner core, an ? chain of L6 type, in which the heptose II residue of the inner core bears in position O-3 a phosphoethanolamine (PEA) substituent and does not bear a PEA substituent in positions O-6 and O-7.

Abstract: The invention especially relates to multivalent vaccine compositions that can treat or prevent at least 60, preferably 75% of infections caused by Neisseria meningitidis especially of serogroup B. To this end, the invention in particular provides a lipooligosaccharide (LOS) of N. meningitidis in particular constituted by a lipid A, an inner core, an ? chain of L6 or L8 type, in which the heptose II residue of the inner core bears in position O-3 and in position O-6 or O-7 a phosphoethanolamine (PEA) substituent, and also to the construction of the strain of N. meningitidis that is capable of expressing such an LOS. The invention also relates to a strain of N. meningitidis of serogroup A that bears a lipooligosaccharide (LOS) in particular constituted by a lipid A, an inner core, an ? chain of L6 type, in which the heptose II residue of the inner core bears in position O-3 a phosphoethanolamine (PEA) substituent and does not bear a PEA substituent in positions O-6 and O-7.

Abstract: The invention especially relates to multivalent vaccine compositions that can treat or prevent at least 60, preferably 75% of infections caused by Neisseria meningitidis especially of serogroup B. To this end, the invention in particular provides a lipooligosaccharide (LOS) of N. meningitidis in particular constituted by a lipid A, an inner core, an ? chain of L6 or L8 type, in which the heptose II residue of the inner core bears in position O-3 and in position O-6 or O-7 a phosphoethanolamine (PEA) substituent, and also to the construction of the strain of N. meningitidis that is capable of expressing such an LOS. The invention also relates to a strain of N. meningitidis of serogroup A that bears a lipooligosaccharide (LOS) in particular constituted by a lipid A, an inner core, an ? chain of L6 type, in which the heptose II residue of the inner core bears in position O-3 a phosphoethanolamine (PEA) substituent and does not bear a PEA substituent in positions O-6 and O-7.

Abstract: The invention relates to a culture medium for Haemophilus influenzae type b, characterized in that the source of protein nitrogen is of non-animal origin and comprises at least one plant peptone and in that the heme source consists of protoporphyrin IX. This medium serves in particular for the production of polyribosyl phosphate (PRP) and for the manufacture of a vaccine against Haemophilus influenzae type b meningitis.

Abstract: The present invention relates to a method for the production of an overproducing Staphylococcus aureus strain comprising: (a) culturing a Staphylococcus aureus strain on a culture medium M1, M2 or M3, (b) optionally, recovering the strains thus produced from the culture medium, and also to the use of said strains for the production of polysaccharides.

Abstract: The invention relates to the type 5 and type 8 capsular polysaccharides produced by overproducing S. aureus strains, and also to the immunogenic compositions and the vaccines comprising said capsular polysaccharides.

Abstract: The invention concerns nucleic acids coding for polypeptides specific of the Neisseria genus pathogenic strains, the corresponding polypeptides, and their diagnostic and therapeutic applications.

Abstract: The invention relates to a vaccine against N. meningitidis infections, comprising (i) an N. meningitidis LOS especially consisting of a lipid A, an inner core, and an L8-type ? chain in which the heptose II residue of the inner core (a) carries a phosphoethanolamine (PEA) substituent in position O-3, and does not carry a PEA substituent in positions O-6 and O-7, or (b) carries a phosphoethanolamine (PEA) substituent in position O-3 and in position O-6 or O-7; and (ii) the lipidated sub-unit B (TbpB) of the receptor of the human transferrine of an N. meningitidis strain or a lipid fragment of said TbpB.

Abstract: The invention relates to the type 5 and type 8 capsular polysaccharides produced by overproducing S. aureus strains, and also to the immunogenic compositions and the vaccines comprising said capsular polysaccharides.

Abstract: The present invention relates to a method for the production of an overproducing Staphylococcus aureus strain comprising: (a) culturing a Staphylococcus aureus strain on a culture medium M1, M2 or M3, (b) optionally, recovering the strains thus produced from the culture medium, and also to the use of said strains for the production of polysaccharides.