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Meningococcal outer membrane proteins have been used for over 20 years in more than 80 million doses; either as carrier protein in a Haemophilus influenzae type b (Hib) polysaccharide conjugate vaccine or as vesicle vaccine formulations against meningococcal disease. Conventional wild-type outer membrane vesicle (wtOMV) vaccines are the only formulations that have shown efficacy against serogroup...
Meningococcal disease occurs worldwide with incidence rates varying from 1 to 1000 cases per 100,000. The causative organism, Neisseria meningitidis, is an obligate commensal of humans, which normally colonizes the mucosa of the upper respiratory tract without causing invasive disease, a phenomenon known as carriage. Studies using molecular methods have demonstrated the extensive genetic diversity...
We investigated the contribution of lipopolysaccharide (LPS) to adjuvant properties of native outer membrane vesicles (NOMV), a vaccine candidate for meningococcal B disease. NOMV induce the maturation of and cytokine production by murine bone marrow-derived dendritic cells through both toll-like receptors (TLR) 2 and 4 which are mostly dependent on the signalling adaptor MyD88. NOMV are also able...
Reported cases of meningococcal disease between 1997 and 2008 were analyzed to determine the evolution after the introduction of a conjugated vaccine. In <6 years, the incidence rate of serogroup C fell from 7.6 to 0.6 per 100,000 persons/year in the periods before (1997–2000) and after (2001–2007) the introduction of the conjugate vaccine. In serogroup B, the reduction was from 15.4 to 11.1. In...
Meningococcal disease is a serious medical condition that can prove fatal within hours in otherwise healthy individuals. Disease incidence is highest in infants, yet there is no broadly protective quadrivalent vaccine that covers this age group. A new investigational quadrivalent meningococcal glycoconjugate vaccine against meningococcal serogroups A, C, W-135, and Y (MenACWY-CRM, Novartis Vaccines,...
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