EC Pulmonology and Respiratory Medicine

Review Article Volume 14 Issue 3 - 2025

The Nature and Prevention from Streptococcus pneumoniae (Pneumococcus) Infection Causing Pneumonia and Other Pneumococcal Diseases

Osama O Ibrahim*

Consultant Biotechnology, Bio Innovation LLC, 7434 Korbel Dr., Gurnee, IL, USA

*Corresponding Author: Osama O Ibrahim, Consultant Biotechnology, Bio Innovation LLC, 7434 Korbel Dr., Gurnee, IL, USA.
Received: January 27, 2025; Published:February 21, 2025



Streptococcus pneumoniae resides asymptomatically (non-invasive) in healthy carriers by colonizing in the respiratory tract, sinuses, and nasal cavity. However, in the case of susceptible elderly, young children, and immunocompromised patients due to their weak immune systems. S. pneumoniae became highly invasive and pathogenic causing pneumonia and other pneumococcal diseases. S. pneumoniae has multiple virulence factors that capable to adhere and invade host cells and tissue. In addition, S. pneumoniae is capable to escape host immune defenses to survive. These serious proprieties of S. pneumoniae infection causing epidemiological concern due to its highly impact on world public health with estimated over one million death per year. Continue understanding S. pneumoniae’s virulence factors, host immune responses, and pneumococcal diseases prevention, in addition to continue improving diagnostics test methods, pneumococcal diseases treatments, and vaccines will enhance regulations and infection prevention from this serious pathogenic microbe.

 Keywords: Streptococcus Pneumoniae; Pneumococcus; Non-Invasive; Invasive; Pneumococcal Diseases; Virulence Factors; Diagnostics; Antibiotic Resistance; Penicillin-Binding Proteins; Vaccines

  1. Enestro Garcia and Rubens Lopez. “Molecular biology of the capsular genes of Streptococcus pneumoniae”. FEMS Microbiology Letters1 (1997): 1-10.
  2. Caroline Obert., et al. “Identification of a candidate Streptococcus pneumoniae core genome and regions of diversity correlated with invasive pneumococcal disease”. Infection and Immunity 8 (2006): 4766-4777.
  3. Arnold BJ., et al. “Horizontal gene transfer and adaptive evolution in bacteria”. Nature Reviews Microbiology 20 (2022): 206-218.
  4. Cydney N Johnson., et al. “Convergent impact of vaccination and antibiotic pressures on pneumococcal populations”. Cell Chemical Biology 2 (2024): 195-206.
  5. Hyams C., et al. “The Streptococcus pneumoniae capsule inhibits complement activity and neutrophil phagocytosis by multiple mechanisms”. Infection and Immunity 2 (2010): 704-715.
  6. Mitchell AM and Mitchell TJ. “Streptococcus pneumoniae: virulence factors and variation”. Clinical Microbiology and Infection5 (2010): 411-418.
  7. Kadioglu A., et al. “The role of Streptococcus pneumoniae virulence factors in host respiratory colonization and disease”. Nature Reviews Microbiology 4 (2008): 288-301.
  8. Ernesto García., et al. “Current trends in capsular polysaccharide biosynthesis of Streptococcus pneumoniae”. Research in Microbiology6 (2000): 429-435.
  9. Nelson AL., et al. “Capsule enhances pneumococcal colonization by limiting mucus-mediated clearance”. Infection and Immunity1 (2007): 83-90.
  10. Waldemar Vollmer and Alexander Tomasz. “Peptidoglycan N-Acetylglucosamine Deacetylase, a Putative Virulence Factor in Streptococcus pneumoniae”. Infection and Immunity 12 (2002): 7176-7178.
  11. Andre GO., et al. “Role of Streptococcus pneumonia proteins in evasion of complement-mediated immunity”. Frontiers in Microbiology 8 (2017): 224.
  12. Hanna Jarva., et al. “Streptococcus pneumoniae evades complement attack and opsonophagocytosis by expressing the pspC locus-encoded Hic protein that binds to short consensus repeats 8-11 of factor H”. Journal of Immunology 4 (2002): 1886-1894.
  13. Jeffrey B Rubins and Edward N Janoff. “Pneumolysin: A multifunctional pneumococcal virulence factor”. Journal of Laboratory and Clinical Medicine1 (1998): 21-27.
  14. Prashant Rai., et al. “Pneumococcal pneumolysin induces DNA damage and cell cycle arrest”. Scientific Reports 6 (2016): 22972.
  15. Peter Mellroth., et al. “LytA, Major autolysin of Streptococcus pneumoniae, requires access to nascent peptidoglycan”. Journal of Biological Chemistry 14 (2012): 11018-11029.
  16. Kadioglu A., et al. “The role of Streptococcus pneumoniae virulence factors in host respiratory colonization and disease”. Nature Reviews Microbiology 4 (2008): 288-2301.
  17. Rosenow C., et al. “Contribution of novel choline-binding proteins to adherence, colonization and immunogenicity of Streptococcus pneumoniae”. Molecular Microbiology 5 (1997): 819-829.
  18. Jedrzejas MJ. “Pneumococcal virulence factors: structure and function”. Microbiology and Molecular Biology Reviews 2 (2001): 187-207.
  19. Shaper M., et al. “PspA protects Streptococcus pneumoniae from killing by apo-lactoferrin, and antibody to PspA enhances killing of pneumococci by apo-lactoferrin”. Infection and Immunity 9 (2004): 5031-5040.
  20. Hammerschmidt S., et al. “Species-specific binding of human secretory component to SpsA protein of Streptococcus pneumoniae via a hexapeptide motif”. Molecular Microbiology 3 (2000): 726-736.
  21. Alison R Kerr., et al. “The contribution of PspC to pneumococcal virulence varies between strains and is accomplished by both complement evasion and complement-independent mechanisms”. Infection and Immunity9 (2006): 5319-5324.
  22. Priya Balachandran., et al. “The autolytic enzyme LytA of Streptococcus pneumoniae is not responsible for releasing pneumolysin”. Journal of Bacteriology10 (2001): 3108-3116.
  23. Martner A., et al. “Pneumolysin released during Streptococcus pneumoniae autolysis is a potent activator of intracellular oxygen radical production in neutrophils”. Infection and Immunity 9 (2008): 4079-4087.
  24. Hessle C., et al. “Gram-positive bacteria are potent inducers of monocytic interleukin-12 (IL-12) while gram-negative bacteria preferentially stimulate IL-10 production”. Infection and Immunity6 (2000): 3581-3586.
  25. Khoosheh K Gosink., et al. “Role of novel choline binding proteins in virulence of Streptococcus pneumoniae”. Infection and Immunity10 (2000): 5690-5695.
  26. Jason W Johnston., et al. “Lipoprotein PsaA in virulence of Streptococcus pneumoniae: Surface accessibility and role in protection from superoxide”. Infection and Immunity10 (2004): 5858-5867.
  27. Deplazes E., et al. “Characterizing the conformational dynamics of metal-free PsaA using molecular dynamics simulations and electron paramagnetic resonance spectroscopy”. Biophysical Chemistry 207 (2015): 51-60.
  28. Pérez-Dorado I., et al. “Pneumococcal surface proteins: when the whole is greater than the sum of its parts”. Molecular Oral Microbiology4 (2012): 221-245.
  29. Bergmann S and Hammerschmidt S. “Versatility of pneumococcal surface proteins”. Microbiology2 (2006): 295-303.
  30. Kolberg J., et al. “Streptococcus pneumoniae enolase is important for plasminogen binding despite low abundance of enolase protein on the bacterial cell surface”. Microbiology 5 (2006): 1307-1317.
  31. Agarwal V., et al. “Enolase of Streptococcus pneumoniae binds human complement inhibitor C4b-binding protein and contributes to complement evasion”. Journal of Immunology 7 (2012): 3575-3584.
  32. Yue Dai., et al “GAPDH delivers heme to soluble guanylyl cyclase”. Journal of Biological Chemistry24 (2020): 8145-8154.
  33. Janoff EN., et al. “Pneumococcal IgA1 protease subverts specific protection by human IgA1”. Mucosal Immunology2 (2014): 249-256.
  34. Jeffrey N Weiser., et al. “Antibody-enhanced pneumococcal adherence requires IgA1 protease”. Proceedings of the National Academy of Sciences of the United States of America 7 (2003): 4215- 4220.
  35. Prashant Rai., et al. “Streptococcus pneumoniae secretes hydrogen peroxide leading to DNA damage and apoptosis in lung cells”. Proceedings of the National Academy of Sciences of the United States of America 26 (2015): E3421-E3430.
  36. Christopher D Pericone., et al. “Inhibitory and bactericidal effects of hydrogen peroxide production by Streptococcus pneumoniae on other inhabitants of the upper respiratory tract”. Infection and Immunity 7 (2000): 3990-3997.
  37. Camille Danne and Shaynoor Dramsi. “Pili of gram-positive bacteria: roles in host colonization”. Research in Microbiology9-10 (2012): 645-658.
  38. Mirian Domenech., et al. “Biofilm formation in Streptococcus pneumoniae”. Microbial Biotechnology 4 (2012): 455-465.
  39. Steven L Percival., et al. “Review healthcare-associated infections, medical devices and biofilms: risk, tolerance and control”. Journal of Medical Microbiology4 (2015): 323-334.
  40. Schmidt H and Hensel M. “Pathogenicity islands in bacterial pathogenesis”. Clinical Microbiology Reviews1 (2004): 14-56.
  41. Richard M Harvey., et al. “The variable region of pneumococcal pathogenicity island 1 is responsible for unusually high virulence of a serotype 1 isolate”. Infection and Immunity3 (2016): 822-832.
  42. Avinash Sheshachalam., et al. “Granule protein processing and regulated secretion in neutrophils”. Frontiers in Immunology 5 (2014): 448.
  43. Uwe Lendeckel., et al. “Macrophages: shapes and functions”. ChemTexts 2 (2022): 12.
  44. Taro Kawai and Shizuo Akira. “The role of pattern-recognition receptors in innate immunity: update on Toll-like receptors”. Nature Immunology5 (2010): 373-384.
  45. Claudine E Fasching., et al. “Impact of the molecular form of immunoglobulin A on functional activity in defense against Streptococcus pneumoniae”. Infection and Immunity4 (2007): 1801-1810.
  46. Tianjing Hu., et al. “30-minute highly multiplexed vaxarray immunoassay for pneumococcal vaccine antigen characterization”. Vaccines11 (2022): 1964.
  47. Anne J Blaschke. “Interpreting assays for the detection of Streptococcus pneumoniae”. Clinical Infectious Diseases 4 (2011): S331-S337.
  48. Jeremy A Duke and Fikri Y Avci. “Emerging vaccine strategies against the incessant pneumococcal disease”. npj Vaccines 1 (2023): 122.
  49. Francesca Micoli., et al. “Strengths and weaknesses of pneumococcal conjugate vaccines”. Glycoconjugate Journal2 (2023): 135-148.
  50. Katherine L O'Brien., et al. “Burden of disease caused by Streptococcus pneumoniae in children younger than 5 years: global estimates”. Lancet9693 (2009): 893-902.
  51. Amy Sarah Ginsburg and Keith P Klugman. “Vaccination to reduce antimicrobial resistance”. The Lancet Global Health12 (2017): e1176-e1177.
  52. King DT., et al. “The mechanisms of resistance to β-lactam antibiotics”. In: Gotte M, Berghuis A, Matlashewski G, Wainberg M, Sheppard D, editors. Handbook of Antimicrobial Resistance. New York, NY: Springer (2017): 177-201.
  53. Nikol Kadeřábková., et al. “Antibiotic susceptibility testing using minimum inhibitory concentration (MIC) assays”. npj Antimicrobials and Resistance1 (2024): 37.

Osama O Ibrahim. "The Nature and Prevention from Streptococcus pneumoniae (Pneumococcus) Infection Causing Pneumonia and Other Pneumococcal Diseases". EC Pulmonology and Respiratory Medicine  14.3 (2025): 01-18 .