[Streptococcosis in chickens. II. Cultural, morphological and biochemical studies of streptococcal strains].

Isolated were a total of 33 Streptococcus strains during two enzootics in adult and young chickens. Their cultural, morphologic, and biochemical aspects were studied in order to elucidate the biotype to which they belonged. Taking into consideration their capacity to ferment trehalose and the fact that they failed to ferment sorbite along with their beta-hemolytic activity, belonging to serologic group C, these Streptococcus cultures were determined as Streptococcus pyogenes hum. C.