This is in contrast to Streptococcus species ... incubation has been inoculated with an organism that can ferment lactose). The first selective ingredient in this agar is bile, which inhibits the ...

This type of medium is both selective and differential ... This is in contrast to Streptococcus species, whose growth is selected against by this high salt agar (plate on the right in the picture ...

On artificial cultivation these strains sooner or later assume the characteristics of streptococcus pyogenes. Cultures on blood agar plates from ordinary milk usually give rise to colonies of ...