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© Perrine Bomme, Guillaume Duménil, Jean-Marc Panaud.
Coloured scanning electron micrograph (SEM) of Neisseria meningitidis on epithelial cells
Publication : Vaccine

Evolution of immune response against Neisseria meningitidis B:14:P1.7,16 before and after the outer membrane vesicle vaccine MenBvac

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Vaccine - 30 May 2012

Caron F, Delbos V, Houivet E, Deghmane AE, Leroy JP, Hong E, Bénichou J, Taha MK

Link to Pubmed [PMID] – 22658929

Vaccine 2012 Jul;30(34):5059-62

A meningococcal B:14:P1.7,16 outbreak in Normandy (France) was recently controlled using MenBvac, an outer membrane vesicle vaccine previously designed against the B:15:P1.7,16 strain. The further emergence of a new B:14:P1.7,16 outbreak in another district in Normandy led us to explore immunity against B:14:P1.7,16 before and after the MenBvac campaign using a 2+1 (day 0, week 6, month 8) schedule. Children (1-5 years) were sampled before, during and up to one year after vaccination. Serum bactericidal activity against B:14:P1.7,16 was titrated using human complement (hSBA) and immune response was defined by hSBA titer ≥4 as a surrogate for protection. The percentage of hSBA titer ≥4 was 10.8% before vaccination, raised to 84.1% 6 weeks after the completion of the schedule, but declined to 39.7% one year later. This level is lower than the targeted 60% level and suggests only short-term persistence of response against B:14:P1.7,16 using this schedule.

https://www.ncbi.nlm.nih.gov/pubmed/22658929