Chapter: Medical Microbiology: An Introduction to Infectious Diseases: Streptococci and Enterococci

Group B Streptococci (Streptococcus agalactiae)

Group B streptococci (GBS) produce short chains and diplococcal pairs of spherical or ovoid Gram-positive cells.

Group B Streptococci (Streptococcus agalactiae)

BACTERIOLOGY

Group B streptococci (GBS) produce short chains and diplococcal pairs of spherical or ovoid Gram-positive cells. Colonies are larger and β-hemolysis is less distinct than with group A streptococci and may even be absent. In addition to the Lancefield B antigen, GBS produce polysaccharide capsules of nine antigenic types (Ia, Ib, II through VIII) all of which contain sialic acid in the form of terminal side chain residues.

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Medical Microbiology: An Introduction to Infectious Diseases: Streptococci and Enterococci : Group B Streptococci (Streptococcus agalactiae) |