Title
A comparison of dynamic tertiary and competition models for describing the fate of Listeria monocytogenes in Minas fresh cheese during refrigerated storage
Date Issued
01 June 2019
Access level
open access
Resource Type
journal article
Author(s)
Cadavez V.
Campagnollo F.
Silva R.
Duffner C.
Schaffner D.
Sant'Ana A.
Polytechnic Institute of Bragança
Publisher(s)
Academic Press
Abstract
This study compares dynamic tertiary and competition models for L. monocytogenes growth as a function of intrinsic properties of a traditional Brazilian soft cheese and the inhibitory effect of lactic acid bacteria (LAB) during refrigerated storage. Cheeses were prepared from raw or pasteurized milk with or without the addition of selected LAB with known anti-listerial activity. Cheeses were analyzed for LAB and L. monocytogenes counts, pH and water activity (a w ) throughout cold storage. Two approaches were used to describe the effect of LAB on L. monocytogenes: a Huang-Cardinal model that considers the effect of pH and a w variation in a dynamic kinetic analysis framework; and microbial competition models, including Lotka-Volterra and Jameson-effect variants, describing the simultaneous growth of L. monocytogenes and LAB. The Jameson-effect with γ and the Lotka-Volterra models produced models with statistically significant coefficients that characterized the inhibitory effect of selected LAB on L. monocytogenes in Minas fresh cheese. The Huang-Cardinal model [pH] outperformed both competition models. Taking a w change into account did not improve the fit quality of the Huang-Cardinal [pH] model. These models for Minas soft cheese should be valuable for future microbial risk assessments for this culturally important traditional cheese.
Start page
48
End page
60
Volume
79
Language
English
OCDE Knowledge area
Biología celular, Microbiología
Scopus EID
2-s2.0-85059339077
PubMed ID
Source
Food Microbiology
ISSN of the container
07400020
Sponsor(s)
Authors are grateful to Fundação de Amparo à Pesquisa do Estado de São Paulo for the financial support (Grants 2014/14891-7 and 2016/09346-5). Dr. Gonzales-Barron acknowledges the financial support provided by the Portuguese Foundation for Science and Technology through the award of an Investigator Fellowship (IF) in the mode of Development Grants (IF/00570). A. S. Sant'Ana acknowledges Conselho Nacional de Desenvolvimento Científico e Tecnológico (Grant # 302763/2014-7, 305804/2017-0), Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - Finance Code 001”. Authors are grateful to Fundação de Amparo à Pesquisa do Estado de São Paulo for the financial support (Grants 2014/14891-7 and 2016/09346-5 ). Dr. Gonzales-Barron acknowledges the financial support provided by the Portuguese Foundation for Science and Technology through the award of an Investigator Fellowship (IF) in the mode of Development Grants ( IF/00570 ). A. S. Sant’Ana acknowledges Conselho Nacional de Desenvolvimento Científico e Tecnológico (Grant # 302763/2014-7 , 305804/2017-0 ), Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - Finance Code 001 ”.
Sources of information: Directorio de Producción Científica Scopus