Fate and Growth Kinetics of Salmonella and Listeria monocytogenes on Mangoes During Storage

Joyjit Saha; Zeynal Topalcengiz; Vijendra Sharma; Loretta M Friedrich; Michelle D Danyluk

doi:10.1016/j.jfp.2023.100151

Fate and Growth Kinetics of Salmonella and Listeria monocytogenes on Mangoes During Storage

J Food Prot. 2023 Oct;86(10):100151. doi: 10.1016/j.jfp.2023.100151. Epub 2023 Aug 25.

Authors

Joyjit Saha¹, Zeynal Topalcengiz², Vijendra Sharma¹, Loretta M Friedrich¹, Michelle D Danyluk³

Affiliations

¹ Department of Food Science and Human Nutrition, Citrus Research and Education Center, University of Florida, Lake Alfred, FL 33850, USA.
² Department of Food Engineering, Faculty of Engineering and Architecture, Muş Alparslan University, Muş 49250, Turkey; Department of Food Science, Center for Food Safety, University of Arkansas System Division of Agriculture, Fayetteville, AR 72704, USA.
³ Department of Food Science and Human Nutrition, Citrus Research and Education Center, University of Florida, Lake Alfred, FL 33850, USA. Electronic address: mddanyluk@ufl.edu.

PMID: 37634809
DOI: 10.1016/j.jfp.2023.100151

Abstract

Imported mangoes have been linked to outbreaks of salmonellosis in the USA. The purpose of this research was to evaluate the persistence and growth kinetics of Salmonella and Listeria monocytogenes on the intact surface of whole 'Ataulfo', 'Kent', and 'Tommy Atkins' mangoes stored at three different temperatures. L. monocytogenes was also evaluated on fresh-cut 'Tommy Atkins' mangoes stored at 4, 12, 20 ± 2°C. Whole mangoes were spot inoculated with rifampicin-resistant pathogen cocktails (6 log CFU/mango) onto the midsection of whole fruit (n = 6). Fruit was stored at 12, 20, or 30 ± 2°C and sampled for up to 28 days. The specific growth rates derived from DMFit models as a function of time were used to develop secondary models. On 'Kent' mangoes, Salmonella had a population increase from 0.3 to 1.1 log CFU/mango with a linear growth rate of ∼0.004, 0.01, and 0.06 log CFU/mango/h at 12, 20, and 30°C, respectively. At 20 and 30°C, Salmonella growth rates were significantly higher than 12°C (P < 0.05). No clear Salmonella growth trend was observed; populations decreased up to 1.6 log CFU/mango on 'Tommy Atkins' and 'Ataulfo' at 12°C. Populations of L. monocytogenes on whole and fresh-cut mangoes declined regardless of temperature and storage period. Food safety during storage should be the top priority for fresh-cut tropical fruit processors.

Keywords: DMFit; Fresh cut; Growth rates; Modeling; Survival; Whole Mangoes.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Colony Count, Microbial
Food Handling
Food Microbiology
Listeria monocytogenes*
Mangifera*
Salmonella
Temperature