A study of non-motile and motile strains of Group D streptococci: serological grouping and identification as enterococci

Abstract

Sixty-seven strains of streptococci belonging to Lancefield Group D-57 from animals or birds and eight from humans-were isolated and examined. Three strains were motile. Sixty-six strains were enterococci and one was classified as Str. bovis. Four strains were beta-haemolytic on horse blood agar but only one of them was beta-haemolytic on sheep blood agar.
Six strains of enterococci and the Str. bovis strain had little or no tyrosine decarboxylase activity.