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The capsule is found most commonly among gram-negative bacteria: Escherichia coli (in some strains) Neisseria meningitidis Klebsiella pneumoniae Haemophilus influenzae Pseudomonas aeruginosa Salmonella However, some gram-positive bacteria may also have a capsule: Bacillus megaterium for example, synRead more
The capsule is found most commonly among gram-negative bacteria:
Escherichia coli (in some strains)
Neisseria meningitidis
Klebsiella pneumoniae
Haemophilus influenzae
Pseudomonas aeruginosa
Salmonella
However, some gram-positive bacteria may also have a capsule:
Bacillus megaterium for example, synthesizes a capsule composed of polypeptide and polysaccharides.
See lessBacillus anthracis
Streptococcus pyogenes synthesizes a hyaluronic acid capsule.
Streptococcus pneumoniae has at least 91 different capsular serotypes. These serotypes are the basis for the pneumococcal vaccines.
Streptococcus agalactiae produces a polysaccharide capsule of nine antigenic types that all contain sialic acid (Ia, Ib, II, III, IV, V, VI, VII, VIII).
Staphylococcus epidermidis
Staphylococcus aureus