Long Chain Formation by Strains of Group a Streptococci in the Presence of Homologous Antiserum: a Type-specific Reaction


Strains of group A streptococci, types 30 and 12, were observed to grow in extremely long chains in liquid media to which homologous antiserum was added. Addition to the media of antisera to heterologous types of streptococci failed to produce long chain growth. The long chain effect was destroyed by absorption of the antiserum with organisms of homologous… (More)

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