Improvements relating to meningococcal outer membrane vesicles

A - Human Necessities – 61 – K

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A61K 39/095 (2006.01)

Patent

CA 2578588

OMVs targeted against specific epidemic strains can be highly effective in controlling localised outbreaks of disease. In combination with large-scale and reproducible manufacturing techniques, a vaccine can be rapidly produced after an outbreak. The invention provides a method for preparing a meningococcal outer membrane vesicle (OMV) vaccine, comprising the steps of: (i) identifying the serosubtype of a meningococcal strain associated with an outbreak of meningococcal meningitis; (ii) preparing OMVs from a meningococcal strain having the serosubtype identified in step (i) for use in vaccine manufacture. The method may comprise one or both of the further steps of (iii) formulating said OMVs as a vaccine; and (iv) distributing said vaccine in a geographical area affected by or likely to be affected by said outbreak. The meningococcal strain will typically be in serogroup B, but may be instead by in serogroup A, C, W135, Y, etc.

Des vésicules de la membrane extérieure ciblées contre des souches épidémiques spécifiques se révèlent très efficaces dans la lutte contre des poussées localisées de la maladie. Une fois l'épidémie déclarée, il est possible de produire très rapidement un vaccin en combinaison avec des techniques de fabrication reproductibles à grand échelle. L'invention concerne une technique de fabrication d'un vaccin à membranes extérieures de méningocoque consistant: (i) à identifier le séro-soustype de la souche méningococcique associée à une flambée de méningite à méningocoques et; (ii) obtenir des vésicules de la membrane extérieure de meningocoque à partir du séro-soustype identifié à l'opération (i) qui serviront à la fabrication du vaccin. Par ailleurs, la méthode peut englober une ou deux opérations supplémentaires: (iii) formulation des membranes extérieures de méningocoque en tant que vaccin; et distribution dudit vaccin dans une aire géographique touchée ou susceptible d'être touchée par la flambée de la maladie. La souche méningococcique se trouve en général dans le sérogroupe B, mais peut aussi se rencontrer dans le sérogroupe A, C, W135, Y, <i>etc</i>.

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