Case report on a defective antibody response against pneumococcal serotype 9V in a patient with a single episode of pneumonia

Diana van Kessel, Thijs Hoffman, Heleen van Velzen-Blad, Bob Meek, Suzan van Mens, Jan Grutters, Ger Rijkers*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

2 Citations (Web of Science)

Abstract

Background: Patients with recurrent respiratory tract infections and an impaired response to pneumococcal polysaccharide vaccination are diagnosed with a specific antibody deficiency. In adult patients with pneumococcal pneumonia an impaired antibody response to the infecting pneumococcal serotype can sometimes be found. It is unknown whether these patients are unable to produce an adequate anti-polysaccharide antibody response to pneumococcal vaccination after recovery.

Case presentation: The authors describe a case of invasive pneumonia caused by Streptococcus pneumoniae serotype 9V in a previously healthy 35-year-old female. This patient did not produce serotype-specific antibodies against the infecting serotype during disease. After pneumococcal polysaccharide vaccination 3 months after recovery, she responded adequately to most other pneumococcal serotypes, but still had no response to the infecting serotype 9V. However, after 9 years (and prior to pneumococcal-conjugate vaccination) normal antibody levels against 9V were found. These antibody levels further increased after pneumococcal-conjugate vaccination.

Conclusion: The authors believe that this case is the first description of a temporary deficient response to the infecting pneumococcal serotype in adults, while other reports with similar observations all involved children.

Original languageEnglish
Article number16
Number of pages5
JournalPneumonia
Volume9
DOIs
Publication statusPublished - 5 Nov 2017

Keywords

  • Community-acquired pneumonia
  • Streptococcus Pneumoniae
  • Antibody deficiency
  • Vaccination
  • Polysaccharide vaccine
  • COMMUNITY-ACQUIRED PNEUMONIA
  • CONJUGATE VACCINE
  • STREPTOCOCCUS-PNEUMONIAE
  • PRIMARY IMMUNODEFICIENCY
  • NASOPHARYNGEAL CARRIAGE
  • INFECTING SEROTYPE
  • DISEASE
  • ADULTS
  • HYPORESPONSIVENESS
  • CHILDREN

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