Streptococcus pneumoniae serotype 6B capsular polysaccharide antigen (Pn6B CPS)

Streptococcus pneumoniae serotype 6B capsular polysaccharide antigen is a complex carbohydrate polymer that serves as the primary virulence factor for the 6B serotype of the pneumococcus (Source: PubMed, PMID: 20660675). This polysaccharide forms a protective capsule around the bacterium, which inhibits host immune recognition and prevents opsonophagocytosis by shielding surface proteins from antibodies and complement factors (Source: UniProt). Serotype 6B is clinically significant due to its high prevalence in pediatric invasive diseases and its frequent association with antibiotic resistance (Source: CDC). In the context of pharmacology, this antigen is utilized as a key component in both pneumococcal conjugate vaccines (PCVs) and pneumococcal polysaccharide vaccines (PPSVs) (Source: FDA). When administered, the antigen triggers the host's B-cells to produce serotype-specific antibodies that facilitate the clearance of the bacteria by the immune system (Source: StatPearls). These vaccines have been highly effective in reducing the global burden of pneumonia, meningitis, and bacteremia caused by this specific serotype.

Other names

Pneumococcal polysaccharide serotype 6BType 6B pneumococcal polysaccharideS. pneumoniae serotype 6B capsulePneumococcal 6B antigen

Induction of active immunity through the production of serotype-specific opsonizing antibodies that facilitate phagocytosis and killing of the bacteria.