Effect of Potassium Lactate and Sodium Diacetate Combination to Inhibit Listeria Monocytogenes In Low and High Fat Chicken and Turkey Hotdog Model Systems
A. V. S. Perumalla1, Navam. S. Hettiarachchy*, 1, 2, Kenneth. F. Over3, Steven. C. Ricke1, 2, Edward. E. Gbur 4, Jinying Zhang 4, Brad Davis3
Identifiers and Pagination:Year: 2012
First Page: 16
Last Page: 23
Publisher Id: TOFSJ-6-16
Article History:Received Date: 28/4/2012
Revision Received Date: 22/6/2012
Acceptance Date: 2/7/2012
Electronic publication date: 7/9/2012
Collection year: 2012
open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Effect of potassium lactate (PL) and sodium diacetate (SD) combinations at varying levels were evaluated in low (5%) and high (20%) fat chicken and turkey hotdog model systems. All the samples were surface inoculated with Lis-teria monocytogenes (approximately 4.6 log cfu/g), vacuum packed and stored at 4 °C for 28 days to determine the effec-tive combination of PL and SD and the effect of fat content on the growth inhibition of L. monocytogenes. In chicken hot-dog samples, maximum growth inhibitions (3.4 log cfu/g) were observed in low fat samples formulated with 3.0% PL and 0.15% SD. In turkey hotdog samples, maximum growth inhibitions (3.3 log cfu/g) were observed in low fat samples for-mulated with 3.0% PL and 0.2% SD. Effective combination levels determined in low and high fat chicken were 3.0% PL and 0.15% SD, whereas in low and high fat turkey, the effective levels were 3.0% PL and 0.20% SD. Overall, fat content had significant effect (P < 0.05) on growth inhibition as indicated by higher inhibitions in low fat chicken and turkey hot-dogs than high fat samples. These results demonstrate that commercial usage levels of PL (2.0%) and SD (0.15%) alone are not sufficient to control L. monocytogenes in case of pathogen contamination.