scholarly journals The Complex Effect of Food Matrix Fat Content on Thermal Inactivation of Listeria monocytogenes: Case Study in Emulsion and Gelled Emulsion Model Systems

2020 ◽  
Vol 10 ◽  
Author(s):  
Davy Verheyen ◽  
Marlies Govaert ◽  
Ti Kian Seow ◽  
Jonela Ruvina ◽  
Vivek Mukherjee ◽  
...  
2021 ◽  
Vol 125 ◽  
pp. 22-36
Author(s):  
Davy Verheyen ◽  
Ozan Altin ◽  
Dagbjørn Skipnes ◽  
Ferruh Erdogdu ◽  
Torstein Skåra ◽  
...  

2018 ◽  
Vol 283 ◽  
pp. 7-13 ◽  
Author(s):  
Davy Verheyen ◽  
Araceli Bolívar ◽  
Fernando Pérez-Rodríguez ◽  
Maria Baka ◽  
Torstein Skåra ◽  
...  

Author(s):  
Mohamed ElFetyany ◽  
Rokaia Kamal ◽  
Mohamed Helmy ◽  
Mohamed Lotfy Nasr

2014 ◽  
Vol 77 (10) ◽  
pp. 1696-1702 ◽  
Author(s):  
VIJAY K. JUNEJA ◽  
JIMENA GARCIA-DÁVILA ◽  
JULIO CESAR LOPEZ-ROMERO ◽  
ETNA AIDA PENA-RAMOS ◽  
JUAN PEDRO CAMOU ◽  
...  

The interactive effects of heating temperature (55 to 65°C), sodium chloride (NaCl; 0 to 2%), and green tea 60% polyphenol extract (GTPE; 0 to 3%) on the heat resistance of a five-strain mixture of Listeria monocytogenes in ground turkey were determined. Thermal death times were quantified in bags that were submerged in a circulating water bath set at 55, 57, 60, 63, and 65°C. The recovery medium was tryptic soy agar supplemented with 0.6% yeast extract and 1% sodium pyruvate. D-values were analyzed by second-order response surface regression for temperature, NaCl, and GTPE. The data indicated that all three factors interacted to affect the inactivation of the pathogen. The D-values for turkey with no NaCl or GTPE at 55, 57, 60, 63, and 65°C were 36.3, 20.8, 13.2, 4.1, and 2.9 min, respectively. Although NaCl exhibited a concentration-dependent protective effect against heat lethality on L. monocytogenes in turkey, addition of GTPE rendered the pathogen more sensitive to the lethal effect of heat. GTPE levels up to 1.5% interacted with NaCl and reduced the protective effect of NaCl on heat resistance of the pathogen. Food processors can use the predictive model to design an appropriate heat treatment that would inactivate L. monocytogenes in cooked turkey products without adversely affecting the quality of the product.


2003 ◽  
Vol 43 (12) ◽  
pp. 1341-1349 ◽  
Author(s):  
Bharti Shah ◽  
Bradford K. Jensen ◽  
Jie Zhang ◽  
Thomas Hunt ◽  
Shashank Rohatagi
Keyword(s):  

2016 ◽  
Vol 5 (3) ◽  
Author(s):  
Raffaella Branciari ◽  
Andrea Valiani ◽  
Raffaella Franceschini ◽  
David Ranucci ◽  
Alessia Lupattelli ◽  
...  

An experimental study for the evaluation of <em>Listeria monocytogenes</em> inactivation during a hot smoking process in tench was performed using <em>Listeria innocua</em> strains. Furthermore, the survival of <em>L. monocytogenes</em> in smoked tench was determined after post-processing in contaminated samples, evaluating the growth potential during storage. <em>L. innocua</em> was not detected after the smoking process. In the challenge test, the growth potential of <em>L. monocytogenes</em> was 5.68 log colony forming unit g<sup>−1</sup>. The results showed that hot smoking at an inner temperature around 72°C is able to eliminate the microorganism. Nevertheless, the product is able to support the growth of the pathogen if post-process contamination occurs, as the food is suitable for <em>Listeria</em> multiplication. Product recontamination should be prevented by means of appropriate application of hygiene measures.


1983 ◽  
Vol 46 (6) ◽  
pp. 545-555 ◽  
Author(s):  
J. L. SMITH ◽  
R. L. BUCHANAN ◽  
S. A. PALUMBO

Effects of various nutritional and environmental factors on growth and enterotoxin synthesis by Staphylococcus aureus in model systems and foods are reviewed. Factors discussed include effects of inoculum size, competing microflora, gaseous atmosphere, carbon source, temperature, pH, sodium chloride, water activity, mineral ions and sublethal stress. Areas where additional research is needed are also discussed.


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