Serotype-specific pneumococcal antibodies in breast milk of Gambian women immunized with a pneumococcal polysaccharide vaccine during pregnancy

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Item Type:	Article
Title:	Serotype-specific pneumococcal antibodies in breast milk of Gambian women immunized with a pneumococcal polysaccharide vaccine during pregnancy
Creators Name:	Obaro, S.K., Deubzer, H.E., Newman, V.O., Adegbola, R.A., Greenwood, B.M. and Henderson, D.C.
Abstract:	BACKGROUND: In breast-feeding populations, immunization during pregnancy with pneumococcal polysaccharide offers a potentially useful approach to preventing pneumococcal disease in young infants. METHODS: Breast milk samples were collected at 0, 2, 4 and 6 months after delivery from Gambian women vaccinated during pregnancy (24-32 weeks gestation) with Pneumovax II (n = 56) or Mengivax A&C (n = 57). Specimens were examined for secretory immunoglobulin A (s-IgA) concentration, subclass distribution and avidity specific to pneumococcal serotypes 4, 6B, 14, 19F and 23F and the antigen mixture in Pneumovax II by enzyme-linked immunosorbent assay. Colostral s-IgA and IgG concentrations in paired maternal sera were compared. RESULTS: Colostral s-IgA concentrations specific to all pneumococcal polysaccharide antigens investigated were significantly higher (P < 0.05) among Pneumovax II vaccinees. Titers specific to serotypes 4, 6B and 14 and the vaccine formula remained significantly higher during 6 months, and those for 19F were higher during 4 months. Significantly higher concentrations of vaccine antigen-specific s-IgA antibody were sustained for 6 months after delivery (P = 0.011). Comparison of colostral s-IgA and IgG in serum revealed a significant correlation only among Mengivax A&C vaccinees for pneumococcal polysaccharide 23F (rs= 0.68; P < or = 0.0001). Vaccination elicited trends toward increased s-IgA2, reaching significance for serotype 14 and the vaccine formula. Immunization elicited significantly higher s-IgA avidities specific to all pneumococcal polysaccharide antigens studied during 6 months. CONCLUSIONS: The public health value of immunization during pregnancy with pneumococcal polysaccharide vaccine in breast-feeding populations warrants further evaluation, particularly in populations with a high incidence of pneumococcal disease in early infancy.
Keywords:	Pneumococcal Polysaccharide Vaccine, Pregnancy, Breast Milk, Infant
Source:	Pediatric Infectious Disease Journal
ISSN:	0891-3668
Publisher:	Lippincott Williams & Wilkins
Volume:	23
Number:	11
Page Range:	1023-1029
Date:	November 2004
Official Publication:	https://doi.org/10.1097/01.inf.0000143651.54880.09
PubMed:	View item in PubMed

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