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 ...

of a hot 2 per cent agar solution (‘Bacto-Agar’, Difco Laboratories) on a pre-warmed glass plate (16 cm. × 4 cm.), which is slightly inclined. After cooling down, the agar sets to a wedge ...

Our Proficlave PC10 and PC20 innovative line of agar and media preparation sterilizers prepare up to 16 liters of plain or complex vitamin / blood added agar formulations, easier and faster than ever.