This is in contrast to Streptococcus species, whose growth is selected against by this high salt agar (plate on the right in the picture below). The differential ingredient in MSA is the sugar ...

Advances in microbiology are largely driven by improvements ... But it was the adaptation of the agar used in a dessert made by one of the members of Koch's laboratory to make a solid growth ...

we’ve had a false start where we spent 10 years and around $50 million developing this technology which is automated agar culture plate readers to launch into the clinical microbiology market ...