Bayesian modeling of two- and three-species bacterial competition in milk

E. J. Quinto, J. M. Marín, I. Caro, J. Mateo, Donald Schaffner

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Listeria monocytogenes is a well-known food-borne pathogen and is among the bacteria best adapted to grow at low temperatures. Psychrotrophic spoilage microorganisms present in milk and milk products are primarily in the genus Pseudomonas, and their numbers increase during cold storage leading to deterioration and/or spoilage. The nature of the competition in two- or three-species bacterial systems with L. monocytogenes, L. innocua, and P. fluorescens in skimmed milk at 7 or 14°C was studied. The Baranyi growth model was used to estimate the growth rate and the maximum population density of the three microorganisms for each strain in single cultures or in two- or three-strains co-cultures. The highest Listeria populations were achieved by pure cultures, decreasing in co-culture with P. fluorescens at both temperatures. A modified deterministic logistic model was applied which includes inhibition functions for single cultures, and two- or three-species cultures. A subsequent Bayesian approach was applied for modelling the bacterial interactions. There was not a direct correlation between the growth rate of P. fluorescens and its inhibitory effect on Listeria species. The use of some species from the natural food microflora to inhibit pathogen growth may be an important tool to enhance the safety of refrigerated foods such as milk and dairy products.

Original languageEnglish (US)
Pages (from-to)952-961
Number of pages10
JournalFood Research International
Volume105
DOIs
StatePublished - Mar 1 2018

Fingerprint

dairy products
Milk
Listeria
coculture
milk
Listeria monocytogenes
Growth
Coculture Techniques
microorganisms
natural foods
logit analysis
food pathogens
spoilage
cold storage
Food
growth models
Pseudomonas
Temperature
Bayes Theorem
Dairy Products

All Science Journal Classification (ASJC) codes

  • Food Science

Keywords

  • Bayesian modeling
  • Co-culture
  • Competitive growth
  • Listeria innocua
  • Listeria monocytogenes
  • Pseudomonas fluorescens

Cite this

Quinto, E. J. ; Marín, J. M. ; Caro, I. ; Mateo, J. ; Schaffner, Donald. / Bayesian modeling of two- and three-species bacterial competition in milk. In: Food Research International. 2018 ; Vol. 105. pp. 952-961.
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Bayesian modeling of two- and three-species bacterial competition in milk. / Quinto, E. J.; Marín, J. M.; Caro, I.; Mateo, J.; Schaffner, Donald.

In: Food Research International, Vol. 105, 01.03.2018, p. 952-961.

Research output: Contribution to journalArticle

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AU - Quinto, E. J.

AU - Marín, J. M.

AU - Caro, I.

AU - Mateo, J.

AU - Schaffner, Donald

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