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• W4200450612 abstract "Abstract Background The introduction of higher valency pneumococcal conjugate vaccines (PCV10 and PCV13) has reduced invasive pneumococcal disease (IPD) incidence. It is unknown whether the degree of reduction differs for pneumococcal meningitis, a small subset of pneumococcal disease but a major cause of severe childhood morbidity and mortality globally. We compared the impact of PCV10/13 on pneumococcal meningitis and all IPD by estimating the changes in incidence following the introduction of PCV10/13 among children &lt; 5 years of age. Methods Data on confirmed positive cases for pneumococcus in cerebrospinal fluid (CSF) were obtained directly from surveillance sites. PCV10/13 impact on all-serotype pneumococcal meningitis and all IPD were estimated using site-specific incidence rate ratios (IRRs) at each post-PCV10/13 year relative to the pre-PCV period, using Bayesian multi-level, mixed effects Poisson regression. All-site weighted average IRRs were estimated using linear mixed-effects regression. Results were stratified by product (PCV10 vs. PCV13) and amount of prior PCV7 use (none; some (1-3 years or 4-5 years with &lt; 70% uptake); or many (≥ 4 years with ≥ 70% uptake). Results 40 surveillance sites (9 PCV10, 31 PCV13) in 28 countries, primarily high-income (82%) that had both CSF and IPD data were included in analyses. CSF+ accounted for 9.0% of IPD cases (IQR across sites: 6.2%-15.6%). The rate and amount of decline was generally similar between meningitis and IPD across all strata. At 5 years after PCV10/13 introduction, the IRRs across PCV7-use strata were 0.28-0.32 for pneumococcal meningitis and 0.22-0.43 for all IPD at PCV10-using sites, and 0.27-0.41 and 0.21-0.32, respectively, for PCV13-using sites. Only one site from the African meningitis belt contributed eligible data, which lacked pre-PCV data to estimate IRRs, but incidence rate of both IPD and meningitis decreased following PCV introduction. Figure 1. All-Site Weighted Average Incidence Rate Ratios, Children &lt; 5 years * Total sites indicate the number of sites with incidence rate data included and pre/post sites indicate the number of sites with both pre− and post−PCV data to estimate site−specific IRRs for each outcome. The size of point estimates is relative to the number of sites with both pre− and post− data. ** Year 0 indicates the year of PCV10/13 introduction and year −1 indicates the last year of PCV7 use prior to PCV10/13 introduction. Conclusion Net declines in all-serotype IPD and CSF+ meningitis in children &lt; 5 years were similar on average for both PCV10 and PCV13. Data from low-income, high-burden, and meningitis-belt regions were limited. Disclosures Maria Deloria Knoll, PhD, Merck (Research Grant or Support)Pfizer (Research Grant or Support)" @default.
• W4200450612 created "2021-12-31" @default.
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• W4200450612 date "2021-11-01" @default.
• W4200450612 modified "2023-09-28" @default.
• W4200450612 title "1180. Comparing Changes in Pneumococcal Meningitis Incidence to all Invasive Pneumococcal Disease Following Introduction of PCV10 and PCV13: The PSERENADE Project" @default.
• W4200450612 doi "https://doi.org/10.1093/ofid/ofab466.1373" @default.
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