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The combined action of carvacrol and high hydrostatic pressure on Listeria monocytogenes Scott A
Author(s) -
Karatzas A.K.,
Kets E.P.W.,
Smid E.J.,
Bennik M.H.J.
Publication year - 2001
Publication title -
journal of applied microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.889
H-Index - 156
eISSN - 1365-2672
pISSN - 1364-5072
DOI - 10.1046/j.1365-2672.2001.01266.x
Subject(s) - carvacrol , listeria monocytogenes , antimicrobial , hydrostatic pressure , food science , chemistry , microbiology and biotechnology , listeria , biology , bacteria , genetics , physics , thermodynamics
Aims: The aim of the study was to investigate the combined antimicrobial action of the plant‐derived volatile carvacrol and high hydrostatic pressure (HHP). Methods and Results: Combined treatments of carvacrol and HHP have been studied at different temperatures, using exponentially growing cells of Listeria monocytogenes , and showed a synergistic action. The antimicrobial effects were higher at 1°C than at 8 or 20°C. Furthermore, addition of carvacrol to cells exposed to sublethal HHP treatment caused similar reductions in viable numbers as simultaneous treatment with carvacrol and HHP. Synergism was also observed between carvacrol and HHP in semi‐skimmed milk that was artificially contaminated with L. monocytogenes . Conclusions: Carvacrol and HHP act synergistically and the antimicrobial effects of the combined treatment are greater at lower temperatures. Significance and Impact of the Study: The study demonstrates the synergistic antimicrobial effect of essential oils in combination with HHP and indicates the potential of these combined treatments in food processing.