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    Impact of the 23-valent pneumococcal polysaccharide vaccination in pregnancy against infant acute lower respiratory infections in the Northern Territory of Australia

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    Author
    Binks, MJ; Moberley, SA; Balloch, A; Leach, AJ; Nelson, S; Hare, KM; Wilson, C; Nelson, J; Morris, PS; Ware, RS; ...
    Date
    2018-12-25
    Source Title
    Pneumonia
    Publisher
    GRIFFITH UNIV EPRESS
    University of Melbourne Author/s
    Tang, Mimi; Andrews, Ross; Mulholland, Edward
    Affiliation
    Paediatrics (RCH)
    Metadata
    Show full item record
    Document Type
    Journal Article
    Citations
    Binks, M. J., Moberley, S. A., Balloch, A., Leach, A. J., Nelson, S., Hare, K. M., Wilson, C., Nelson, J., Morris, P. S., Ware, R. S., Tang, M. L. K., Torzillo, P. J., Carapetis, J. R., Mulholland, K. & Andrews, R. M. (2018). Impact of the 23-valent pneumococcal polysaccharide vaccination in pregnancy against infant acute lower respiratory infections in the Northern Territory of Australia. PNEUMONIA, 10 (1), https://doi.org/10.1186/s41479-018-0057-2.
    Access Status
    Open Access
    URI
    http://hdl.handle.net/11343/253657
    DOI
    10.1186/s41479-018-0057-2
    Abstract
    Background: Indigenous children in Australia's Northern Territory are densely colonised with the pneumococcus within weeks of birth antecedent to a high prevalence of acute lower respiratory infection (ALRI). We assessed the impact of the 23-valent pneumococcal polysaccharide vaccine (23vPPV) in pregnancy against infant ALRI in this setting. Methods: In an open label, allocation concealed, outcome-assessor blinded, randomised controlled trial conducted in the Northern Territory of Australia, healthy Indigenous women aged 17-39 years were randomised to receive the 23vPPV during pregnancy (n = 75; 30-36 weeks gestation), at birth (n = 75), or at 7 months post-partum (n = 77). Randomisation was stratified by community of residence. In a secondary analysis, we compared the incidence of ALRI hospitalisations and ALRI clinic presentations (ascertained from electronic medical records) among infants of pregnancy vaccinees versus infants of mothers not vaccinated in pregnancy (controls) in the first year of life. Results: ALRI hospitalisation incidence was 12.3 per 100 child-years among infants of pregnancy vaccinees compared with 15.8 per 100 child-years among controls (hazard ratio (HR) 0.77, 95%CI 0.29-2.03). ALRI hospitalisations were more common among remote compared to urban infants (27.7 versus 8.6 per 100 child-years). Stratification by dwelling highlighted a differential antenatal vaccine effect against ALRI hospitalisations (urban HR 2.45, 95%CI 0.60-9.99; remote HR 0.21, 95%CI 0.04-1.08). ALRI clinic presentation incidence was similar among infants of pregnancy vaccinees and controls. Conclusions: In this small study, antenatal 23vPPV vaccination was not associated with a reduced incidence of infant ALRI hospitalisations or ALRI clinic presentations during the first year of life. A potential differential effect between urban and remote settings warrants further investigation. Trial registration: PneuMum; ClinicalTrials.gov NCT00714064.

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