Survival of Listeria monocytogenes on organic Honeycrisp and Fuji apples during storage at 5, 12 and 22.5°C

This study aimed to evaluate the survival of Listeria monocytogenes on organic Honey Crisp (HC) and Fuji (FJ) apples during storage at various temperatures. Fresh organic HC and FJ apples (without wax coating) obtained from a local wholesale market were inoculated with a 2-strain mix of L. monocytog...

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Bibliographic Details
Published in:Journal of agriculture and food research 2022-12, Vol.10, p.100455, Article 100455
Main Authors: Freed, Connor, Stearns, Rebecca, Freshour, Nettie, Luo, Yangchao, Shen, Cangliang
Format: Article
Language:English
Subjects:
Apples
Listeria monocytogenes
Modeling
Survival
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Summary:This study aimed to evaluate the survival of Listeria monocytogenes on organic Honey Crisp (HC) and Fuji (FJ) apples during storage at various temperatures. Fresh organic HC and FJ apples (without wax coating) obtained from a local wholesale market were inoculated with a 2-strain mix of L. monocytogenes followed by storing at 5.0 [22.9% Relative Humidity (RH)], 12.0 (37.0% RH), and 22.5 °C (50.4% RH) for 60, 35, 7 days, respectively, and were periodically (day-0 to 60) analyzed for microbial populations. Surviving L. monocytogenes were spread-plated on Modified-Oxford agar after 10 or 100-fold serial dilution. Data was analyzed using the mixed-model-procedure of SAS and GinaFit software. The initial populations of L. monocytogenes on HC and FJ apples were 6.23–6.89 log10CFU/apple for storage at 5, 12, and 22.5 °C. The pathogen survival cell counts decreased (P 
ISSN:2666-1543
2666-1543
DOI:10.1016/j.jafr.2022.100455