Streptococcus pneumoniae serotype 14

**Streptococcus pneumoniae serotype 14** refers to a specific capsular polysaccharide variant of the bacterium *Streptococcus pneumoniae*, an encapsulated, Gram-positive diplococcus that is a major cause of invasive diseases such as bacterial pneumonia, meningitis, and sepsis—especially in children and the elderly[4][6]. The capsule serves as a key virulence factor by inhibiting phagocytosis and facilitating immune evasion. Serotyping is based on differences in the chemical structure of this capsule; more than 100 pneumococcal serotypes are known, with type-specific immunity conferred by antibodies against each unique capsular polysaccharide[4][6]. Serotype 14 has historically been one of the most prevalent types associated with invasive disease prior to widespread vaccination efforts. It has also been frequently linked to penicillin non-susceptibility and multidrug resistance due to genetic recombination events affecting both capsule biosynthesis genes (*cps*) and antibiotic target genes[1][2][7]. The introduction of conjugate vaccines targeting common pathogenic serotypes—including type 14—has significantly reduced its prevalence but led to increased circulation of non-vaccine types through "serotype switching"[1]. Serotype-specific antibody testing can be used for diagnosis or assessment of vaccine response; for example, IgG levels against the type 14 capsular antigen are measured clinically after vaccination or suspected infection[8]. There are no known abbreviations commonly used for this target. **Note:** This entry describes a bacterial strain/serotype rather than a molecular therapeutic target like an enzyme or receptor. Therefore, it does not fit standard drug-target classification schemes ("receptor," "enzyme," etc.), nor does it have canonical abbreviations typical for molecular targets. If you require information about a specific protein or gene product from *S. pneumoniae* relevant as a drug target (such as pneumolysin or PspA), please specify further. The entry is marked **is_incorrect: true**, because "Streptococcus pneumoniae serotype 14" refers to an organismal subtype rather than a discrete molecular entity typically considered in drug-target databases.

Other names

S. pneumoniae serotype 14Pneumococcus serotype 14Streptococcus pneumoniae type 14

Inhibition of cell wall synthesis (beta-lactams such as penicillin and cephalosporins) - Inhibition of protein synthesis (macrolides)