A selective enumeration medium for bifidobacteria in fermented dairy products.
A selective medium, blood-glucose-liver agar containing oxgall (.2 mg/ml) and gentamicin (30 micrograms/ml), was formulated for the selective enumeration of bifidobacteria in fermented dairy products containing both lactobacilli and streptococci. Recovery rates of bifidobacteria on this selective medium were around 90% of recovery on blood-glucose-liver agar. Strains of lactobacilli and streptococci were mostly inhibited with higher dilutions on this selective medium.
Lim
K S
KS
Research and Development Center, Hankuk Yakult Milk Products Co., Ltd., Kyunggi-do, Korea.
Huh
C S
CS
Baek
Y J
YJ
Kim
H U
HU
D000900:Anti-Bacterial Agents; D001644:Bifidobacterium / Q000187:drug effects / Q000302:isolation & purification*; D001647:Bile Acids and Salts; D015169:Colony Count, Microbial; D003470:Culture Media; D003611:Dairy Products / Q000382:microbiology*; D005285:Fermentation; D005839:Gentamicins; D007778:Lactobacillus / Q000187:drug effects; D008826:Microbial Sensitivity Tests; D013291:Streptococcus / Q000187:drug effects; D015014:Yogurt / Q000382:microbiology
D000900:Anti-Bacterial Agents; D001647:Bile Acids and Salts; D003470:Culture Media; D005839:Gentamicins