Isolate and enumerate lactic acid bacteria from food with Thermo Scientific™ Oxoid™ MRS Agar (Dehydrated). This medium is designed to support profuse growth of all strains of lactobacilli, even the difficult and slow-growing strains of Lactobacillus brevis and Lactobacillus fermenti.
MRS Agar is designed to encourage the growth of the ‘lactic acid bacteria’ which includes species of the following genera: Lactobacillus, Streptococcus, Pediococcus, and Leuconostoc. All these species can produce lactic acid in considerable amounts.
‘Lactic acid bacteria’ are Gram-positive, catalase and oxidase negative and are fastidious in their nutritional requirements. Growth is enhanced considerably by microaerobic conditions. Generally, the ‘lactic acid bacteria’ show delayed growth and smaller colony size than other microorganisms. They may be overgrown in non-selective media, especially if incubation is required for 2-4 days.
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