Reductive evolution in Streptococcus agalactiae and the emergence of a host adapted lineage

Abstract excerpt

BACKGROUND: During host specialization, inactivation of genes whose function is no more required is favored by changes in selective constraints and evolutionary bottlenecks. The Gram positive bacteria Streptococcus agalactiae (also called GBS), responsible for septicemia and meningitis in neonates also emerged during the seventies as a cause of severe epidemics in fish farms. To decipher the genetic basis for the...

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