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1999•Applied and Environmental MicrobiologyOpen access

A New Selective Medium for Bifidobacterium spp

Yolanda Nebra, Anicet R. Blanch

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Abstract

A new selective antibiotic-free medium for Bifidobacterium spp. is defined. This medium has lactulose as the main carbon source and includes methylene blue, propionic acid, and lithium chloride as inhibitors of some related bacterial species. The low pH of the medium contributes to the inhibition of the growth of Enterobacteriaceae. This new selective medium has a simple composition, and the level of recovery it yields is similar to those yielded by nonselective media for Bifidobacterium strains. It could thus be used for routine analysis in environmental or food microbiology.

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What this paper is about

A new selective antibiotic-free medium for Bifidobacterium spp. is defined. This medium has lactulose as the main carbon source and includes methylene blue, propionic acid, and lithium chloride as inhibitors of some related bacterial species. The low pH of the medium contributes to the inhibition of the growth of Enterobacteriaceae. This new selective medium has a simple composition, and the level of recovery it yields is similar to those yielded by nonselective media for Bifidobacterium strains. It could thus be used for routine analysis in environmental or food microbiology.

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Available abstract

A new selective antibiotic-free medium for Bifidobacterium spp. is defined. This medium has lactulose as the main carbon source and includes methylene blue, propionic acid, and lithium chloride as inhibitors of some related bacterial species. The low pH of the medium contributes to the inhibition of the growth of Enterobacteriaceae. This new selective medium has a simple composition, and the level of recovery it yields is similar to those yielded by nonselective media for Bifidobacterium strains. It could thus be used for routine analysis in environmental or food microbiology.

Key concepts: Bifidobacterium, Lactulose, Bacteria, Enterobacteriaceae, Chemistry, Actinomycetaceae, Methylene blue, Microbiology

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