Cover Image

Growth potential of Listeria monocytogenes in six different RTE fruit products: impact of food matrix, storage temperature and shelf life

Matthias Ziegler, Simon Rüegg, Roger Stephan, Claudia Guldimann
  • Matthias Ziegler
    Institute for Food Safety and Hygiene, Vetsuisse Faculty, University of Zürich, Switzerland
  • Simon Rüegg
    Section of Epidemiology, Vetsuisse Faculty, University of Zürich, Switzerland
  • Roger Stephan
    Institute for Food Safety and Hygiene, Vetsuisse Faculty, University of Zürich, Switzerland
  • Claudia Guldimann
    Institute for Food Safety and Hygiene, Vetsuisse Faculty, University of Zürich, Switzerland | claudiaguldimann@yahoo.com

Abstract

We tested the growth potential of Listeria monocytogenes on six RTE fruit products at low (4°C at the factory followed by 8°C retail/home storage) and abusive (4°C followed by 12°C) storage temperatures. Sliced coconut and fresh cut cantaloupe, as well as a fruit mix containing diced pineapple, cantaloupe, apples and grapes supported the growth of L. monocytogenes with a growth potential d>0.5 log CFU/g over six days. Mangoes, a mix of diced kiwi, cantaloupe and pineapple as well as a mix of diced pineapple, mango, grapefruit, kiwi and pomegranate did not support a growth potential that exceeded 0.5 log CFU/g over six days. The growth potential of L. monocytogenes correlated significantly with the pH; no product with a pH below 4 showed a significant growth potential of L. monocytogenes. Time after inoculation was also a significant predictor of the growth potential, while the fruit type and storage temperature were not.

Keywords

RTE fruits; Mango; Cantaloupe; Coconut; Fruit mix

Full Text:

PDF
APPENDIX
Submitted: 2018-05-29 08:27:27
Published: 2018-10-08 09:44:00
Search for citations in Google Scholar
Related articles: Google Scholar
Abstract views:
108

Views:
PDF
19
APPENDIX
55

Article Metrics

Metrics Loading ...

Metrics powered by PLOS ALM


Copyright (c) 2018 Matthias Ziegler, Simon Rüegg, Roger Stephan, Claudia Guldimann

Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
 
© PAGEPress 2008-2018     -     PAGEPress is a registered trademark property of PAGEPress srl, Italy.     -     VAT: IT02125780185     •     Privacy