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 ...

This type of medium is both selective and differential. The MSA will select for organisms such as Staphylococcus species which can live in areas of high salt concentration (plate on the left in the ...

This type of medium is both selective and differential. The MSA will select for organisms such as Staphylococcus species which can live in areas of high salt concentration (plate on the left in the ...