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Streptococcus pneumoniae: 'captain of the men of death' and financial burden

Hasan Yesilkaya1, Marco R Oggioni2,3, Peter W Andrew1

  • 1Department of Respiratory Sciences, University of Leicester, Leicester LE1 7RH, UK.

Microbiology (Reading, England)
|February 7, 2023
PubMed

Insights

Streptococcus pneumoniae can be harmless or cause severe disease. Its adaptive capabilities, virulence factors like capsule and pneumolysin, and vaccine-preventable serotypes are key to understanding its impact.

Area of Science:

  • Microbiology
  • Pathogenesis
  • Immunology

Background:

  • Streptococcus pneumoniae is a major human pathogen causing significant morbidity and mortality.
  • This bacterium possesses remarkable adaptive capabilities, including genetic transformation and DNA shuffling.
  • Key virulence factors include the polysaccharide capsule and the toxin pneumolysin.

Purpose of the Study:

  • To summarize the pathogenic potential and adaptive mechanisms of Streptococcus pneumoniae.
  • To highlight the role of specific virulence determinants in disease causation.
  • To discuss the protective efficacy of polysaccharide-based vaccines.

Main Methods:

  • Review of existing literature on Streptococcus pneumoniae.
  • Analysis of genetic and molecular mechanisms of adaptation and virulence.
  • Evaluation of vaccine strategies and their effectiveness.

Main Results:

  • Streptococcus pneumoniae can colonize the upper respiratory tract asymptomatically or cause severe invasive diseases.
  • Genetic transformation and acquisition of foreign DNA contribute to its adaptability.
  • Intracellular survival within macrophages is linked to virulence, alongside capsule and pneumolysin.

Conclusions:

  • Understanding Streptococcus pneumoniae's adaptability and virulence factors is crucial for combating infections.
  • Polysaccharide-based vaccines are effective against specific serotypes, offering a vital preventive measure.
Keywords:
Streptococcus pneumoniaegenomepneumococcal infectionsvirulence

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