Abstract
Minimal inhibitory concentration (MIC), suspension and biofilm tests
were used in evaluating the disinfecting efficacy of eight commercially
available disinfectants and four chlorinated alkaline cleaners against 10
strains of Listeria monocytogenes at refrigerated temperatures. The adaptive
response and cross-adaptation of L. monocytogenes to the disinfectants and
chlorinated alkaline cleaners were investigated. The bactericidal components
in the agents used were chlorine, quaternary ammonium compound (QAC),
peracetic acid, ethanol and isopropanol. With some exceptions the
disinfectants were efficient against the L. monocytogenes strains. One
alkaline hypochlorite containing disinfectant was not efficient in the
suspension and MIC tests at the lowest concentration recommended by the
manufacturer. The chlorinated alkaline cleaners were effective against L.
monocytogenes. A QAC-based disinfectant was found to be the least-effective
agent on both glass bead-blasted polyethylene and stainless-steel surfaces.
Adaptive and cross-adaptive responses of L. monocytogenes strains were
observed towards the QAC-based agent, but over 2-fold increases to other
agents were not observed. These results suggest that the adaptive responses of
L. monocytogenes to disinfectants or chlorinated alkaline cleaners are of a
minor concern.
Original language | English |
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Pages (from-to) | 1041-1048 |
Journal | LWT - Food Science and Technology |
Volume | 40 |
Issue number | 6 |
DOIs | |
Publication status | Published - 2007 |
MoE publication type | A1 Journal article-refereed |
Keywords
- Susceptibility
- Adaptive response
- Disinfectants
- Cleaning agents
- Listeria monocytogenes