A COMPARISON OF WHOLE-CELL PROTEIN PROFILES FOR SPORADIC HUMAN ISOLATES OF STREPTOCOCCUS-EQUISIMILIS AND BETA-HEMOLYTIC GROUP-G STREPTOCOCCI

Whole cell protein profiles were resolved for Streptococcus equisimili s (group C) and large colony human biotype P-haemolytic group G strept ococci by the use of one dimensional sodium dodecyl sulphate-polyacryl amide gel electrophoresis. Strains of S. equisimilis (27 in tote) were distributed among eight patterns designated A to H. Pattern A represe nted 48.2% of the latter isolates. Strains of group G streptococci (59 in tote) were distributed among sixteen patterns designated 1-16, and there were no predominant patterns which represented more than 20% of all strains. Profiles were reproducible, not susceptible to strain pa ssage, but susceptible to variation in growth media. Considerable homo logy was observed among bacteria in either Lancefield group.