Lactobacilli MRS (LMRS) Agar is a selective and non-differential medium used for the isolation, enumeration, and cultivation of Lactobacillus spp. and Leuconostoc spp.. Originally developed in 1960 by de Man, Rogosa & Sharpe, the medium is suitable for most lactic acid bacteria and is intended as a substitute for Tomato Juice Agar. Selectivity against Streptococci and Fungi is provided by ammonium citrate and sodium acetate. Used at low pH, ammonium citrate allows growth of Lactobacilli while inhibiting a number of other microorganisms.• Product meets ISO, NF, SM-Dairy, and USP reference methods and performance criteria.• LMRS Agar should be used by trained professionals within a laboratory setting. • Product is not intended for use in the diagnosis or treatment of disease or other human conditions.