title: Biochemical differences among human and animal streptococci of Lancefield group C or group G.
abstract: Pyogenic streptococci of Lancefield group C or group G from human or animal sources were examined with a view to increasing the number of diagnostic tests useful for their differentiation. Human strains of group G produced L-prolyl-L-arginine aminopeptidase but isolates of Streptococcus equisimilis (group C) did not. Tests for alpha-L-glutamate aminopeptidase together with fermentation of glycogen or sorbitol distinguished S. dysgalactiae from strains of S. equisimilis isolated from animals. It was confirmed that fermentation tests were helpful in the study of S. equi and S. zooepidemicus and that enzyme reactions helped distinguish between S. canis and the human strains of group G.
authors.affiliation: Division of Hospital and Respiratory Infection, Central Public Health Laboratory, London.
authors.forename: A
authors.initials: A
authors.lastname: Efstratiou
authors.forename: G
authors.initials: G
authors.lastname: Colman
authors.forename: G
authors.initials: G
authors.lastname: Hahn
authors.forename: J F
authors.initials: JF
authors.lastname: Timoney
authors.forename: J M
authors.initials: JM
authors.lastname: Boeufgras
authors.forename: D
authors.initials: D
authors.lastname: Monget
mesh_terms: D000626:Aminopeptidases / Q000096:biosynthesis; D000818:Animals; D050260:Carbohydrate Metabolism; D005285:Fermentation; D006003:Glycogen / Q000378:metabolism; D006801:Humans; D013012:Sorbitol / Q000378:metabolism; D013291:Streptococcus / Q000145:classification* / Q000201:enzymology / Q000378:metabolism
chemical_list: D013012:Sorbitol; D006003:Glycogen; D000626:Aminopeptidases