Virulence profiling of Streptococcus dysgalactiae subspecies equisimilis isolated from infected humans reveals 2 distinct genetic lineages that do not segregate with their phenotypes or propensity to cause diseases.

Abstract excerpt

BACKGROUND: In spite of the emerging importance of Streptococcus dysgalactiae subspecies equisimilis (human group C streptococci [GCS] and group G streptococci [GGS]) in human health, its molecular makeup remains largely undefined. Apart from sharing a phylogenetic relationship with the human pathogen group A streptococci (GAS), GCS/GGS and GAS colonize the same ecological niche and exhibit considerable overlap...

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