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Time interval of revaccination with 23-valent pneumococcal polysaccharide vaccine more than 5 years does not affect the immunogenicity and safety in the Japanese elderly.

ABSTRACT: In the previous study, revaccination with 23-valent pneumococcal polysaccharide vaccine (PPSV23) in a total of 161 elderly subjects (?70 years of age) who had received the initial vaccination at least 5 years before (range: 5 to11 years) showed an acceptable safety profile and induction of immune responses to the serotypes in PPSV23. The optimal interval between the initial vaccination and revaccination with PPSV23 is of interest to protect elderly from pneumococcal disease over the long-term. In this post-hoc analysis, we analyzed that the immunogenicity and safety of revaccination with PPSV23 by time interval after the initial vaccination. The level of serotype-specific immunoglobulin G (IgG) geometric mean concentrations (GMCs) and opsonophagocytic killing activity (OPA) geometric mean titers (GMTs) at 4 weeks after revaccination with PPSV23 in each subgroup based on time interval (5, 6, 7, 8 and 9-11 years) after the initial vaccination were comparable to those after the primary vaccination and vaccine-induced serotype-specific IgG and OPA levels were similar regardless of the time interval after the initial vaccination. There was no difference in the safety profiles among the subgroups. In conclusion, administration of a second dose of PPSV23 at least 5 years after the initial vaccination was immunogenic and well-tolerated in the elderly ?70 years of age regardless of the time interval after the initial vaccination.

SUBMITTER: Kawakami K

PROVIDER: S-EPMC6149784 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature

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Time interval of revaccination with 23-valent pneumococcal polysaccharide vaccine more than 5 years does not affect the immunogenicity and safety in the Japanese elderly.

Kawakami Kenji K Kishino Hiroyuki H Kanazu Shinichi S Takahashi Kenichi K Iino Tomoharu T Sawata Miyuki M Musey Luwy L

Human vaccines & immunotherapeutics 20180514 8

In the previous study, revaccination with 23-valent pneumococcal polysaccharide vaccine (PPSV23) in a total of 161 elderly subjects (≥70 years of age) who had received the initial vaccination at least 5 years before (range: 5 to11 years) showed an acceptable safety profile and induction of immune responses to the serotypes in PPSV23. The optimal interval between the initial vaccination and revaccination with PPSV23 is of interest to protect elderly from pneumococcal disease over the long-term. I ...[more]

PMID: 29580133

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Project description:BackgroundRoutine vaccination of elderly people against pneumococcal diseases is recommended in many countries. National guidelines differ, recommending either the 23-valent polysaccharide vaccine (PPV23), the 13-valent conjugate vaccine (PCV13) or both. Considering the ongoing debate on the effectiveness of PPV23, we performed a systematic literature review and meta-analysis of the vaccine efficacy/effectiveness (VE) of PPV23 against invasive pneumococcal disease (IPD) and pneumococcal pneumonia in adults aged ≥60 years living in industrialized countries.MethodsWe searched for pertinent clinical trials and observational studies in databases MEDLINE, EMBASE, Cochrane Central Register of Controlled Trials, and Cochrane Database of Systematic Reviews. We assessed the risk of bias of individual studies using the Cochrane Risk of Bias tool for randomized controlled trials and the Newcastle-Ottawa Scale for observational studies. We rated the overall quality of the evidence by GRADE criteria. We performed meta-analyses of studies grouped by outcome and study design using random-effects models. We applied a sensitivity analysis excluding studies with high risk of bias.ResultsWe identified 17 eligible studies. Pooled VE against IPD (by any serotype) was 73% (95%CI: 10-92%) in four clinical trials, 45% (95%CI: 15-65%) in three cohort studies, and 59% (95%CI: 35-74%) in three case-control studies. After excluding studies with high risk of bias, pooled VE against pneumococcal pneumonia (by any serotype) was 64% (95%CI: 35-80%) in two clinical trials and 48% (95%CI: 25-63%) in two cohort studies. Higher VE estimates in trials (follow-up ~2.5 years) than in observational studies (follow-up ~5 years) may indicate waning protection. Unlike previous meta-analyses, we excluded two trials with high risk of bias regarding the outcome pneumococcal pneumonia, because diagnosis was based on serologic methods with insufficient specificity.ConclusionsOur meta-analysis revealed significant VE of PPV23 against both IPD and pneumococcal pneumonia by any serotype in the elderly, comparable to the efficacy of PCV13 against vaccine-serotype disease in a recent clinical trial in elderly people. Due to its broader serotype coverage and the decrease of PCV13 serotypes among adults resulting from routine infant immunization with PCV13, PPV23 continues to play an important role for protecting adults against IPD and pneumococcal pneumonia.

Dataset Information

Time interval of revaccination with 23-valent pneumococcal polysaccharide vaccine more than 5 years does not affect the immunogenicity and safety in the Japanese elderly.

Publications

Time interval of revaccination with 23-valent pneumococcal polysaccharide vaccine more than 5 years does not affect the immunogenicity and safety in the Japanese elderly.

Similar Datasets

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