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The effect of slurry storage and anaerobic digestion on survival of pathogenic bacteria
Author(s) -
Kearney Theresa E.,
Larkin M.J.,
Levett P.N.
Publication year - 1993
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.1365-2672.1993.tb03000.x
Subject(s) - listeria monocytogenes , yersinia enterocolitica , salmonella , anaerobic digestion , microbiology and biotechnology , mesophile , campylobacter jejuni , digestion (alchemy) , biology , bacteria , food science , listeria , escherichia coli , chemistry , biochemistry , chromatography , ecology , genetics , methane , gene
The decline in viable numbers of Salmonella typhimurium, Yersinia enterocolitica and Listeria monocytogenes in beef cattle slurry is temperature‐dependent; they decline more rapidly at 17°C than at 4°C. Mesophilic anaerobic digestion caused an initial rapid decline in the viable numbers of Escherichia coli, Salm. typhimurium, Y. enterocolitica and L. monocytogenes. This was followed by a period in which the viable numbers were not reduced by 90%. The T 90 values of E. coli, Salm. typhimurium and Y. enterocolitica ranged from 0.7 to 0.9 d during batch digestion and 1.1 to 2.5 d during semi‐continuous digestion. Listeria monocytogenes had a significantly higher mean T 90 value during semi‐continuous digestion (35.7 d) than batch digestion (12.3 d). Anaerobic digestion had little effect in reducing the viable numbers of Campylobacter jejuni.