Journal Article

Immunological Characterization of Conjugated <i>Haemophilus influenzae</i> Type b Vaccine Failure in Infants

Mijke A. Breukels, Lodewijk Spanjaard, Lieke A. M. Sanders and Ger T. Rijkers

in Clinical Infectious Diseases

Published on behalf of Infectious Diseases Society of America

Volume 32, issue 12, pages 1700-1705
Published in print June 2001 | ISSN: 1058-4838
Published online June 2001 | e-ISSN: 1537-6591 | DOI: http://dx.doi.org/10.1086/320755
Immunological Characterization of Conjugated Haemophilus influenzae Type b Vaccine Failure in Infants

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Infant vaccination with conjugated Haemophilus influenzae type b (Hib) vaccine is highly effective in protecting against invasive Hib infections, but vaccine failures do occur. Twenty-one vaccine failures are reported since the introduction of the Hib conjugate vaccine in The Netherlands. Of the 14 evaluable patients, 6 children showed no antibody response to Hib polysaccharide in convalescent-phase serum (immunoglobulin [Ig] G anti-Hib level <1.0 µg/mL), including 1 child with hypogammaglobulinemia and 1 child with IgG2 deficiency. After revaccination, almost all children developed anti-Hib antibodies. In case of Hib vaccine failure, case investigation should be performed, including measurement of serum Ig concentrations as well as specific anti-Hib antibodies. Invasive Hib disease after infant conjugate Hib vaccination may be the presentation of an underlying immunodeficiency, but more often, only a decreased antibody response to Hib is found; revaccination with conjugated Hib vaccine is advised.

Journal Article.  4016 words.  Illustrated.

Subjects: Infectious Diseases ; Immunology ; Public Health and Epidemiology ; Microbiology

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