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Placental acquisition of maternal specific IgG and Helicobacter pylori colonization in infancy

Bunn, J., Thomas, J. E., Harding, M., Coward, W. A. and Weaver, L. T. (2003) 'Placental acquisition of maternal specific IgG and Helicobacter pylori colonization in infancy'. Helicobacter, Vol 8, Issue 5, pp. 568-572.

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Background. Colonization with Helicobacter pylori generally occurs in infancy, and the microorganism is often acquired from close family members. Rate of infant colonization may be affected by maternal immune status. Methods. To investigate the potential protective effect of anti-H. pylori immunoglobulin G (IgG) acquired via the placenta, 65 mothers and their infants were studied from the infant's birth for 1 year. Circulating IgG antibodies were measured by enzyme-linked immunosorbent assay ( ELISA) in cord blood and every 8 weeks. Immunoblotting was performed on sera from infants with significant increases in IgG levels. Rate of infant H. pylori colonization was measured by C-13 urea breath tests every 4 weeks from the age of 12 weeks. Results. Maternal and infant cord blood specific IgG levels were correlated (R-2 =.747, p <.001). Infant H. pylori specific IgG fell 5-fold compared to maternal levels over the first 6 months of life, and rose subsequently in many cases, with the development of novel immunoblot patterns. There were no significant associations between the age at first positive urea breath test and maternal or infant cord specific H. pylori IgG levels. Conclusions. Transplacentally acquired specific IgG antibody does not protect infants from colonization by H. pylori

Item Type: Article
Subjects: QW Microbiology and Immunology > Antigens and Antibodies. Toxins and Antitoxins > QW 575 Antibodies
WC Communicable Diseases > Infection. Bacterial Infections > Bacterial Infections > WC 200 Bacterial infections (General or not elsewhere classified)
WS Pediatrics > By Age Groups > WS 420 Newborn infants. Neonatology
WS Pediatrics > By Age Groups > WS 430 Infancy
Faculty: Department: Groups (2002 - 2012) > Child & Reproductive Health Group
Digital Object Identifer (DOI):
Depositing User: Martin Chapman
Date Deposited: 21 Sep 2012 14:13
Last Modified: 06 Feb 2018 13:04


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