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Streptococcus agalactiae DNA

Molecular classification: Other (bacterial chromosomal DNA)

Overview

The DNA of group B Streptococcus (Streptococcus agalactiae) consists of a single bacterial chromosome that encodes genes responsible for the pathogen’s structural components (such as capsular polysaccharide and pilus proteins), virulence factors (such as adhesins and fibrinogen-binding proteins), metabolic functions, and resistance mechanisms[3][2][8]. GBS DNA harbors genetic variability leading to different serotypes, sequence types, and the presence of mobile genetic elements that contribute to pathogenicity and epidemiological diversity[6][8][7]. Diagnostic approaches for GBS infection frequently rely on the detection of unique sequences within GBS DNA by molecular tests[10].

Other names: GBS DNAStreptococcus agalactiae DNA

Biological functions

Encodes structural, metabolic, and virulence-associated proteins[5][3]Governs capsular polysaccharide synthesis[3][10]Controls cell division, biosynthesis, and genetic exchange[8]Hosts CRISPR-Cas9 systems for foreign DNA defense[5]

Disease associations

Infection (principally neonatal sepsis, chorioamnionitis, adult disease)[5][9][10]Virulence and resistance gene carriage[3][8]

Safety considerations

null for GBS DNA itself; safety issues pertain to GBS infection (e.g., neonatal sepsis, meningitis)[9][10]

Biomarkers

Detection of GBS DNA by PCR is used as a diagnostic biomarker for colonization or infection with GBS[10]Specific DNA sequences (e.g., capsular types Ia, Ib, II–IX) indicate strain identification[10][3]Detection of virulence genes (e.g., hvgA for hypervirulence strains)[4]

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