Often abbreviated to
MRS, this type of bacterial
growth medium is so-named by its inventors:
de Man,
Rogosa and
Sharpe. Developed in 1960, this medium was designed to favour the luxuriant growth of
Lactobacilli for lab study. It contains
sodium acetate, which suppresses the growth of many competing bacteria (although some other Lactobacillales, like
Leuconostoc and
Pediococcus, may grow). This medium has a clear brown colour.