Shalom Ben-Shimol (Israel)
Soroka University Medical Center Pediatric Infectious Disease UnitPresenter of 1 Presentation
DYNAMICS OF INVASIVE PNEUMOCOCCAL DISEASE IN ISRAEL IN CHILDREN AND ADULTS IN THE PCV13 ERA; A NATIONWIDE PROSPECTIVE SURVEILLANCE (ID 351)
Abstract
Background
Following the 13-valent pneumococcal conjugate vaccine (PCV13) implementation in infants worldwide, overall and vaccine-type invasive pneumococcal disease (IPD) rates declined in children, with variable indirect impact on IPD rates in adults.
Methods
A population-based, prospective, nationwide active surveillance of overall 8,614 IPD cases in Israel, during 2004-2019 (for adults, 2009-2019). PCV7/PCV13 were implemented in July 2009/November 2010, respectively, with >90% uptake in children <2 years. The 23-valent pneumococcal polysaccharide vaccine uptake among >65 years was ~75%. Overall, PCV13 serotypes (VT13) and non-VT13 serotypes (NVT) incidence rates ratios were calculated, comparing the pre-PCV (2004-2008 for children; 2009-2011 for adults) and late-PCV13 (2016-2019) periods, for different age groups. For pre-PCV episodes in which serotypes were missing, extrapolation was conducted.
Results
IPD rates declined by 67% in children <5 and 5-17 years. For adults, rates significantly declined only in the 18-44 years (by 53%) (Fig.). VT13 rates significantly declined; range 94% in <5 years to 60% in ≥85 years. NVT rates significantly increased in <5, 50-64 and ≥65 years; VT13 serotypes 3, 14 and 19A, and NVT serotypes 8 and 12F were predominant in 2016-2019. During 2016-2019, VT13, PCV15 additional serotypes (22F, 33F) and PCV20 additional serotypes (8, 10A, 11A, 12F, 15B/C, 22F, 33F) caused 19.2%, 7.4% and 39.2% of IPD.
Conclusions
Continuous monitoring of circulating serotypes in all age groups is essential for the development of new vaccination strategies.