Food Microbiology: Foodborne Pathogens and Diseases

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Food Science and Technology".

Deadline for manuscript submissions: closed (20 September 2023) | Viewed by 1176

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Guest Editor
Institute of Food Sciences and Nutrition, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37 Bratislava, Slovakia
Interests: food microbiology
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Special Issue Information

Dear Colleagues,

In the second half of the twentieth century, food production shifted globally, increasing production and stabilizing prices. Food production systems have become very efficient, high yields, quality, and safety and low production costs. Today, we are facing stagnating production, highly dependent on the availability and costs of energy, and that might not be sustainable in the near future. Actual war conflicts also constitute a threat to food accessibility for consumers in some parts of the world. Thus, food safety issues may not seem to be of the utmost importance.

A circular economy would improve sustainability. The reduction in food waste and development of plant-based and other edible alternatives to products of animal origin could improve food accessibility. However, they also present new challenges and pose questions about undesirable, opportunistic, or pathogenic microorganisms and their secondary toxic metabolites. Attention must be paid to the emergence of (new) food safety hazards. Have we collected enough data to conduct exposure or risk assessments?

This Special Issue is devoted to these microbiological challenges and answering questions similar to those listed above.

Prof. Dr. Lubomir Valik
Guest Editor

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Keywords

  • emerging microbiological food safety hazards and food-borne diseases in the food chain, including new circular food systems
  • qualitative and quantitative insight into the presence and behaviour (growth, survival, inactivation) of pathogenic and opportunistic microorganisms in raw materials and foods, including food alternatives and edible insects
  • application of predictive microbiology approaches and tools
  • microbiological exposure assessment contributing to decision-making in the prevention of food-borne diseases
  • efficacy of food, preventive and processing approaches aimed at reducing or inactivating microorganisms in the food chain
  • presence of persistent micro-organisms emerging in food production and their behaviour in relation to non-persistent micro-organisms
  • microbial interaction between pathogens and background microbiota in fermented foods

Published Papers (1 paper)

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Research

14 pages, 1908 KiB  
Article
Modelling and Predicting the Growth of Escherichia coli and Staphylococcus aureus in Co-Culture with Geotrichum candidum and Lactic Acid Bacteria in Milk
by Pavel Ačai, Martina Koňuchová and Ľubomír Valík
Appl. Sci. 2023, 13(15), 8713; https://0-doi-org.brum.beds.ac.uk/10.3390/app13158713 - 28 Jul 2023
Viewed by 785
Abstract
The growth of two pairs of co-cultures (Escherichia coli/Geotrichum candidum and Staphylococcus aureus/Geotrichum candidum) with a starter culture of lactic acid bacteria was studied in milk at temperatures ranging from 15 °C to 21 °C, related to the ripening of artisanal [...] Read more.
The growth of two pairs of co-cultures (Escherichia coli/Geotrichum candidum and Staphylococcus aureus/Geotrichum candidum) with a starter culture of lactic acid bacteria was studied in milk at temperatures ranging from 15 °C to 21 °C, related to the ripening of artisanal cheese. For an inoculum of approximately 106 CFU/mL, LAB not only induced an early stationary phase of E. coli (two isolates BR and PS2) and S. aureus (isolates 2064 and 14733) but also affected their death phase. In co-cultures with LAB and G. candidum, the numbers of E. coli and S. aureus increased in 2 logs and 1 log, respectively, reaching maximum population densities (MPDs) of less than 5 and 4 logs, respectively. After that, the populations of both bacteria represented with two isolates decreased in more than 2 logs and 3 logs within 2 days compared to their MPDs, respectively. G. candidum was found to be the subject of interactions with LAB within a given temperature range only partially. To develop a tertiary model for the growth curves of the populations, a one-step approach was used, combining the Huang-Gimenez and Dalgaard primary model with secondary square-root models for growth rate and lag time. Furthermore, the reparametrized Gompertz-inspired function with the Bigelow secondary model was used to describe the death phase of the E. coli and S. aureus isolates. The prediction ability of the growth of the H-GD tertiary model for co-cultures was cross-validated within the isolates and datasets in milk and milk medium with 1% NaCl. The study can be used as knowledge support for the hygiene guidelines of short-ripened raw milk cheeses, as was our case in Slovakia. Full article
(This article belongs to the Special Issue Food Microbiology: Foodborne Pathogens and Diseases)
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