what disk inhibits the growth of streptococcus pyogenes
The most. significant pathogens are Streptococcus pyogenes (Lancefield Group A), Streptococcus. agalactiae (Lancefield Group B) a nd Streptococcus pneumoniae. Some streptococci (fo rmerly. group D) n ow placed in the genus Enterococcus are of medical significance because they are.