Granadaene: Proposed structure of the group B Streptococcus polyenic pigment

Article Abstract:

The chemical nature of the red pigment produced by the group B streptococcus (GBS) Streptococcus agalactiae, earlier thought to be a carotene, is investigated. Elemental analysis and mass and nuclear magnetic resonance spectral studies result in a proposal of the structure to be a 676-Da ornithine rhamno-polyene with a linear chain of 12 conjugated double bonds, named granadaene, which may help understand its biosynthetic pathway and the role of cyl-genes in the universal linkage between pigment and hemolytic activity in GBS.

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Mobile genetic elements provide evidence for a bovine origin of clonal complex 17 of Streptococcus agalactiae

Article Abstract:

The epidemiological changes in Streptociccus agalactiae infections were evaluated by examining the link between ecological niches of Streptociccus agalactiae bacterium by determining the prevalence of eleven mobile genetic elements. Findings revealed significant difference in the nine of these elements according to the human or bovine origin of the isolate.

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Pigment production by Streptococcus agalactiae in quasi-defined media

Article Abstract:

A quasi-defined medium has been developed to support Streptococcus agalactiae growth as a pigmented colony. The medium is made up of salts, starch, a peptic digest of albumin, nucleosides, amino acids and vitamins.

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