Abstract: The present invention relates to immunogenic compositions and vaccines for the treatment and prevention of Neisserial disease. Immunogenic compositions of the invention comprise the Hsf (also called Msf) and Opc neisserial antigens. These antigens have been found to be the two mechanisms by which Neisseria meningitidis binds host vitronectin (in order to promote adhesion and/or to evade host complement mediated killing). Vaccines comprising both antigens can thus advantageously result in an immune response which is better able to kill neisserial strains and otherwise prevent vitronectin-related neisserial complement mediated killing resistance and/or neisserial adhesion events required for pathogenesis.

Abstract: The present invention provides a ligand isolated from Moraxella catarrhalis outer membrane protein which binds to CEACAM receptors, said ligand comprising a receptor binding domain comprising an amino acid sequence selected from the group disclosed, or a fragment, homologue, functional equivalent, derivative, degenerate or hydroxylation, sulphonation or glycosylation product or other secondary processing product thereof. The invention also provides medicaments and vaccines comprising said ligand, and their use in the treatment or prophylaxis of infection. Also provided is a screening method for the identification of novel therapeutic compounds.

Abstract: The present invention provides a ligand isolated from Moraxella catarrhalis outer membrane protein which binds to CEACAM receptors, said ligand comprising a receptor binding domain comprising an amino acid sequence selected from the group disclosed, or a fragment, homologue, functional equivalent, derivative, degenerate or hydroxylation, sulphonation or glycosylation product or other secondary processing product thereof. The invention also provides medicaments and vaccines comprising said ligand, and their use in the treatment or prophylaxis of infection. Also provided is a screening method for the identification of novel therapeutic compounds.

Abstract: The present invention provides a ligand isolated from Moraxella catarrhalis outer membrane protein which binds to CEACAM receptors, said ligand comprising a receptor binding domain comprising an amino acid sequence selected from the group disclosed, or a fragment, homologue, functional equivalent, derivative, degenerate or hydroxylation, sulphonation or glycosylation product or other secondary processing product thereof. The invention also provides medicaments and vaccines comprising said ligand, and their use in the treatment or prophylaxis of infection. Also provided is a screening method for the identification of novel therapeutic compounds.