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4CMenB (Bexsero), a vaccine developed against invasive meningococcal disease caused by capsular group B strains (MenB), was recently licensed for use by the European Medicines Agency. Assessment of 4CMenB strain coverage in specific epidemiologic settings is of primary importance to predict vaccination impact on the burden of disease. The Meningococcal Antigen Typing System (MATS) was developed to...
A new vaccine, 4CMenB, is composed of surface proteins of Neisseria meningitidis and is aimed to target serogroup B (MenB) isolates. The vaccine components are present in meningococcal isolates of other serogroups allowing potential use against meningococcal isolates belonging to non-B serogroups. Isolates of serogroup X (MenX) have been emerged in countries of the African meningitis belt. 4CMenB...
Opsonophagocytosis is the primary mechanism for the clearance of Group B Streptococcus (GBS) by the host, and levels of opsonic antibodies may correlate with protection in preclinical models. A killing-based opsonophagocytosis assay (OPA), can be used to determine the functional activity of vaccine-induced GBS-specific antibodies. The assay, which measures the number of bacterial colonies surviving...
Using a fixed dose of antigen, the immune response to detoxified mutants of LT-WT following intranasal (i.n.), subcutaneous (s.c.) and oral (i.g.) immunisation has been studied. When given i.n., both LT-WT and mutant toxin, K63, generated significant levels of toxin-specific IgG in the serum, and the levels of IgA in nasal and lung lavages were greater than those induced by rLT-B. In comparison,...
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