Abstract
Summary
A method of assay for a growth factor required by L. bifidus of avian origin has been developed. The factor is found in low amounts in isolated proteins and animal products, in higher amounts in plant materials, and in highest amounts in fermentation products, yeasts and bacterial cultures. The growth factor was not found in concentrates of liver, whey and fish solubles which were potent sources of unidentified chick growth factors. Chemical and physical properties of the L. bifidus factor are described.
Get full access to this article
View all access options for this article.