Cited by 270Pneumonia and Respiratory InfectionsBacterial Infections and VaccinesMicrobial infections and disease research

The Immune Response to Pneumococcal Proteins during Experimental Human Carriage

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McCool, Tera L., Cate, Thomas R., Moy, Gregory, Weiser, Jeffrey N.·2002·The Journal of Experimental Medicine

Abstract

Colonization of the nasopharynx is the initial step in all infections caused by Streptococcus pneumoniae. The antibody response to carriage was examined in an experimental model of human colonization in healthy adults. Asymptomatic colonization was detected in 6/14 subjects and continued for up to 122 d. Susceptibility to carriage did not correlate with total serum immunoglobulin (Ig)G to the homotypic capsular polysaccharide. All of the colonized subjects, in contrast, developed a serum IgG and secretory IgA response to a 22 kD protein, whereas 7 of 8 subjects who did not become colonized had preexisting antibody to this protein. Analysis of the 22 kD protein identified it as the NH(2)-terminal region of pneumococcal surface protein A (PspA). Our findings provide evidence for the role of antibody to this protein fragment in preventing pneumococcal carriage by humans.

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  1. [10]Tomasz, A. 1964 A chemically defined medium for Streptococcus pneumoniae Bacteriol. Proc. 64: 29.

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Authors
McCool, T. L., Cate, T. R., Moy, G., & Weiser, J. N.
Affiliations
  • University of Pennsylvania (US)
  • Baylor College of Medicine (US)
Corresponding author
Moy, Gregory
Venue
The Journal of Experimental Medicine
Published
2002-02-04
Volume
195
Issue
3
Pages
359-365
ISSN
  • 0022-1007 (ISSN-L)
  • 1540-9538
OpenAlex
W2118878242
Cited by
270
References
21
Citations by year
2026: 7 · 2025: 3 · 2024: 6 · 2023: 7 · 2022: 7 · 2021: 6 · 2020: 5 · 2019: 10 · 2018: 10 · 2017: 11 · 2016: 7 · 2015: 22 · 2014: 27 · 2013: 16 · 2012: 19
FWCI
7.79
Type
journal article
Language
en
Open access
Locations
  • The Journal of Experimental Medicine (publishedVersion)
  • PubMed Central (publishedVersion, cc-by-nc-sa)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (n01ai065298-005)
  • National Institute of Allergy and Infectious Diseases (AI38436, N01AI 65298, R21AI044231, R01AI044231, N01 AI065298, AI44231)
Topics
  • Health Sciences › Medicine › Epidemiology › Pneumonia and Respiratory Infections
  • Life Sciences › Immunology and Microbiology › Microbiology › Bacterial Infections and Vaccines
  • Life Sciences › Immunology and Microbiology › Microbiology › Microbial infections and disease research
Keywords
Streptococcus pneumoniae, pneumococcal carriage, nasopharyngeal carriage, PspA, secretory IgA, serum IgG, antibody response, capsular polysaccharide
MeSH terms
Adult, Amino Acid Sequence, Animals, Antibodies, Bacterial, Epitopes, Antigens, Bacterial, Antigens, Surface, Bacterial Proteins, Base Sequence, Carrier State, DNA, Bacterial, Humans, Immunoglobulin A, Secretory, Immunoglobulin G, Molecular Sequence Data, Peptide Fragments, Pneumococcal Infections, Streptococcus pneumoniae, Rats, Sprague-Dawley, Pneumococcal Vaccines, Rats

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