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Distribution of Psychrophilic Micro‐organisms in Different Dairy Environments
Author(s) -
Dempster J. F.
Publication year - 1968
Publication title -
journal of applied bacteriology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.889
H-Index - 156
eISSN - 1365-2672
pISSN - 0021-8847
DOI - 10.1111/j.1365-2672.1968.tb00370.x
Subject(s) - tributyrin , psychrophile , bacteria , food science , biology , aeromonas , pseudomonas , microbiology and biotechnology , lipase , biochemistry , enzyme , genetics
SUMMARY 421 cultures of psychrophilic bacteria, yeasts and moulds obtained from 8 sources were characterized to genus and species level by standard tests. 43% were Pseudomonas spp., 20% Achromobacter spp., 11.6% coli‐aerogenes bacteria and 10.2% flavobacteria. The remaining cultures were classified as Paracolon and Aeromonas spp., coryneform bacteria, micrococci, yeasts and moulds. 339 isolates were tested for lipolytic activity on tributyrin and butter fat agars. Results indicated that 232 (68.5%) and 215 (63.3%) were lipolytic on tributyrin and butter fat respectively.