Premium
IMPROVED MEDIA AND METHODS FOR THE ESTIMATION OF INFECTING ORGANISMS IN BAKER'S YEAST
Author(s) -
Levi J. D.
Publication year - 1956
Publication title -
journal of the institute of brewing
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.523
H-Index - 51
eISSN - 2050-0416
pISSN - 0046-9750
DOI - 10.1002/j.2050-0416.1956.tb02858.x
Subject(s) - yeast , petri dish , succinic acid , xylose , biology , food science , microbiology and biotechnology , biochemistry , chemistry , fermentation
Methods of plating are described for the estimation of infecting organisms in large samples of pressed baker's yeast. These include the use of 12‐in. diam. assay frames as giant petri dishes, on which 1–10 g. of yeast can be plated. Two new media, based on xylose and succinic acid, are used for the estimation of Oospora lactis which is a common contaminant, and the medium containing succinic acid is also useful for tracing wild yeast infections. Succinate broth has shown promise for the estimation of O. lactis in samples of yeast greater than 100 g.