Dynamic evaluation of antibodies against serogroup A, C, Y and W135 strains in healthy adults im-munized with one dose of quadrivalent meningococcal polysaccharide vaccine / 中华微生物学和免疫学杂志

Objective To dynamically analyze the antibodies with regard to in vitro serum bacteri-cidal activity and the quantity of IgG in healthy adults received one dose of immunization with ACYW 135 me-ningococcal polysaccharide vaccine .To investigate the term of protection with polysaccharide vaccine and the correlation between bactericidal titer and IgG concentration .Methods Twenty healthy adults were given one dose of immunization with quadrivalent meningococcal polysaccharide vaccine .Serum samples were col-lected before and after vaccination at specific time points .Test for serum bactericidal activity ( SBA ) and quantitative ELISA were performed to detect bactericidal titers and IgG concentrations in serum samples .Re-sults Certain levels of antibodies against capsular polysaccharides of serogroup A , C, Y and W135 strains had already existed prior to immunization .Moreover, bactericidal titers against serogroup A , Y and W135 strains except serogroup C strain were relatively high .Specific IgG concentrations and bactericidal titers for all serogroup stains were significantly increased on day 15 after vaccination (P0.05).However, a close correla-tion was demonstrated between GMTs and GMCs of serum samples (r>0.7, P<0.05).Conclusion The geometric mean titers ( GMTs) and geometric mean concentrations ( GMCs) of serum samples collected be-fore and after vaccination at different time points were reliable and consistent parameters for the evaluation of vaccine .The term of protection of quadivalent meningococcal polysaccharide vaccine was about 3 years upon a single dose of immunization .

A Case Study of Meningococcal Vaccination At a University Hospital / 감염과화학요법

Meningococcal infection is a life threatening disease that leaves serious sequelae in spite of appropriate treatment, thus vaccination for high risk groups are important for the prevention of meningococcal diseases. However, the vaccine for Neisseria meningitidis has not been available in Korea until we introduced bivalent (serogroup A and C) polysaccharide vaccine for the first time for relief works in our university hospital. The vaccine was administered from January 2005 to March 2007 to 317 persons. Of the groups administered, the largest group among them were 133 (133/317, 42%) students who planned to study abroad and needed the vaccination for secure entrance to school dormitories. This group was followed by health care workers, travellers to the regions of the world with high risks of meningococcal diseases, and splenectomised patients. To rationalize the domestic use of meningococcal vaccine, the availability of vaccines first needs to be simplified by introducing them to the domestic market; for this to be possible, the approval system for vaccines should be reformed and epidemiogical studies need to be carried out.

A Case Study of Meningococcal Vaccination At a University Hospital / 감염과화학요법

Meningococcal infection is a life threatening disease that leaves serious sequelae in spite of appropriate treatment, thus vaccination for high risk groups are important for the prevention of meningococcal diseases. However, the vaccine for Neisseria meningitidis has not been available in Korea until we introduced bivalent (serogroup A and C) polysaccharide vaccine for the first time for relief works in our university hospital. The vaccine was administered from January 2005 to March 2007 to 317 persons. Of the groups administered, the largest group among them were 133 (133/317, 42%) students who planned to study abroad and needed the vaccination for secure entrance to school dormitories. This group was followed by health care workers, travellers to the regions of the world with high risks of meningococcal diseases, and splenectomised patients. To rationalize the domestic use of meningococcal vaccine, the availability of vaccines first needs to be simplified by introducing them to the domestic market; for this to be possible, the approval system for vaccines should be reformed and epidemiogical studies need to be carried out.

Anticorpos antipolissacarídeo de Neisseria meningitidis, grupos A e C, em vacinados e em pacientes com doença meningocócica previamente vacinados ou não / Anti-Neisseria meningitidis polysaccharide antibodies, groups A and C, in vaccinated and previously vaccinated or unvaccinated patients with meningococcal disease

A resposta ao estímulo antigênico e vacina polissacarídica antimeningocócica foi avaliada pela reação de hemaglutinação passiva em indivíduos de faixas etárias de 0 a maiores de 21 anos. A vacina polissacarídica A mostrou-se mais imunogênica do que a vacina polissacarídica C. Não foi encontrada reação cruzada entre o polissacarideo A e C. Na doença meningocócica, a reação mostrou-se específica para os dois grupos de meningococos, permitido diagnóstico correto de muitos casos em que falharam as outras provas diagnósticas. Em pacientes vacinados com a vacina antimeningocócica AC, que vieram a ter a doença, a reação de hemaglutinação passiva mostrou-se ineficaz como prova diagnóstica pois a maioria dos pacientes, quando apresentaram títulos hemaglutinantes, estes eram muitos baixos, sem conversão sorologicas ou, quando havia conversão, não foi possível averiguar se esta era devida à vacina ou à doença (AU).