Document Detail

Control of Listeria monocytogenes growth in a ready-to-eat poultry product using a bacteriophage.
MedLine Citation:
PMID:  21925027     Owner:  NLM     Status:  In-Data-Review    
A bacteriophage (phage) that infected strains of the species Listeria monocytogenes as well as Listeria ivanovii and Listeria welshimeri, but not Listeria grayi or Listeria innocua, was isolated from sheep faeces. The phage had a contractile tail and an icosohedral head indicating that it was a myovirus, and was morphologically similar to phage A511. At 30 °C, phages added at 5.2 × 10(7) PFU ml(-1) prevented the growth in broth of L. monocytogenes present at approximately twice this concentration for 7 h, but re-growth occurred such that the concentration after 24 h incubation was similar in both control and phage-treated cultures. At the same temperature, but on the surface of vacuum-packed ready-to-eat chicken breast roll, there was an immediate 2.5 log(10) CFU cm(-2) reduction in pathogen concentration following addition of phages and then re-growth. However, at a temperature reflecting that at which a chilled food might be held (5°C), this re-growth was prevented over 21 days incubation. The data suggest a dose-dependent rapid reduction in pathogen concentration followed by no continued phage-mediated effect. These results, alongside other published data, indicate that a high concentration of phages per unit area is required to ensure significant inactivation of target pathogens on food surfaces.
B Bigot; W-J Lee; L McIntyre; T Wilson; J A Hudson; C Billington; J A Heinemann
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Publication Detail:
Type:  Journal Article     Date:  2011-07-14
Journal Detail:
Title:  Food microbiology     Volume:  28     ISSN:  1095-9998     ISO Abbreviation:  Food Microbiol.     Publication Date:  2011 Dec 
Date Detail:
Created Date:  2011-09-19     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8601127     Medline TA:  Food Microbiol     Country:  England    
Other Details:
Languages:  eng     Pagination:  1448-52     Citation Subset:  IM    
Copyright Information:
Copyright © 2011 Elsevier Ltd. All rights reserved.
Food Safety Programme, Institute of Environmental Science and Research Ltd (ESR), Christchurch Science Centre, PO Box 29-181, Ilam, Christchurch, New Zealand; AgroSup Dijon, Institut national superieur des sciences agronomiques de l'alimentation et de l'environnement, 26 boulevard Petitjean, BP 87999, 21079 DIJON cedex, France.
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