Back to Search
Start Over
Modeling the growth of Listeria monocytogenes on cut cantaloupe, honeydew and watermelon.
- Source :
-
Food microbiology [Food Microbiol] 2014 Apr; Vol. 38, pp. 52-5. Date of Electronic Publication: 2013 Aug 13. - Publication Year :
- 2014
-
Abstract
- A recent outbreak linked to whole cantaloupes underscores the importance of understanding growth kinetics of Listeria monocytogenes in cut melons at different temperatures. Whole cantaloupe, watermelon, and honeydew purchased from a local supermarket were cut into 10 ± 1 g cubes. A four-strain cocktail of L. monocytogenes from food related outbreaks was used to inoculate fruit, resulting in ~10(3) CFU/10 g. Samples were stored at 4, 10, 15, 20, or 25 °C and L. monocytogenes were enumerated at appropriate time intervals. The square root model was used to describe L. monocytogenes growth rate as a function of temperature. The model was compared to prior models for Salmonella and Escherichia coli O157:H7 growth on cut melon, as well as models for L. monocytogenes on cantaloupe and L. monocytogenes ComBase models. The current model predicts faster growth of L. monocytogenes vs. Salmonella and E. coli O157:H7 at temperatures below 20 °C, and agrees with estimates from ComBase Predictor, and a corrected published model for L. monocytogenes on cut cantaloupe. The model predicts ~4 log CFU increase following 15 days at 5 °C, and ∼1 log CFU increase following 6 days at 4 °C. The model can also be used in subsequent quantitative microbial risk assessments.<br /> (Copyright © 2013 Elsevier Ltd. All rights reserved.)
Details
- Language :
- English
- ISSN :
- 1095-9998
- Volume :
- 38
- Database :
- MEDLINE
- Journal :
- Food microbiology
- Publication Type :
- Academic Journal
- Accession number :
- 24290625
- Full Text :
- https://doi.org/10.1016/j.fm.2013.08.001