A narrative review of genomic characteristics, serotype, immunogenicity, and vaccine development of capsular polysaccharide.

This narrative review describes genomic characteristic, serotyping, immunogenicity, and vaccine development of capsular polysaccharide (CPS). CPS is a primary virulence factor of . The genomic characteristics of CPS, including the role of biosynthetic gene and genetic variation within (capsule polysaccharide) locus which may lead to serotype replacement are still being investigated. One hundred unique serotypes of have been identified through various methods of serotyping using phenotypic and genotypic approach. The advantages and limitations of each method are various, emphasizing the need for accurate and comprehensive serotyping for effective disease surveillance and vaccine targeting. In addition, we elaborate the critical role of CPS in vaccine development by providing an overview of immunogenicity, ongoing research of pneumococcal vaccines, and the impact on disease burden.