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Colonies of Streptococcus equi are surrounded by a wide zone of beta-hemolysis. Mucous colonies, encapsulated strain. Cultivation 48 hours in an aerobic
atmosphere, 37°C.
In general, Lancefield group C streptococci (GCS) have cell walls consisting of group-specific carbohydrate and mucopeptide polymer. The group-specific antigens of GCS are polysaccharides that are made up of hexoamine and rhamnose. Unlike group A streptococci (GAS), GCS carbohydrate has a terminal antigenic determinant of N-acetyl-galactosamine.
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