Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 397483
Title Survival of Listeria monocytogenes on a conveyor belt material with or without antimicrobial additives
Author(s) Chaitiemwong, N.; Hazeleger, W.C.; Beumer, R.R.
Source International Journal of Food Microbiology 142 (2010)1-2. - ISSN 0168-1605 - p. 260 - 263.
Department(s) Food Microbiology
VLAG
Publication type Refereed Article in a scientific journal
Publication year 2010
Keyword(s) food-processing environments - stainless-steel surfaces - foodborne pathogens - cross-contamination - escherichia-coli - silver ions - stress - products - growth - rubber
Abstract Survival of Listeria monocytogenes on a conveyor belt material with or without antimicrobial additives, in the absence or presence of food debris from meat, fish and vegetables and at temperatures of 10, 25 and 37 °C was investigated. The pathogen survived best at 10 °C, and better at 25 °C than at 37 °C on both conveyor belt materials. The reduction in the numbers of the pathogen on belt material with antimicrobial additives in the first 6 h at 10 °C was 0.6 log unit, which was significantly higher (P <0.05) than the reduction of 0.2 log unit on belt material without additives. Reductions were significantly less (P <0.05) in the presence of food residue. At 37 °C and 20% relative humidity, large decreases in the numbers of the pathogen on both conveyor belt materials during the first 6 h were observed. Under these conditions, there was no obvious effect of the antimicrobial substances. However, at 25 °C and 10 °C and high humidity (60–75% rh), a rapid decrease in bacterial numbers on the belt material with antimicrobial substances was observed. Apparently the reduction in numbers of L. monocytogenes on belt material with antimicrobial additives was greater than on belt material without additives only when the surfaces were wet. Moreover, the presence of food debris neutralized the effect of the antimicrobials. The results suggest that the antimicrobial additives in conveyor belt material could help to reduce numbers of microorganisms on belts at low temperatures when food residues are absent and belts are not rapidly dried
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