Refined approach to the evaluation of heat resistance applied to Enterobacteriaceae in cheese stretching

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26722861%3A_____%2F23%3AN0000040" target="_blank" >RIV/26722861:_____/23:N0000040 - isvavai.cz</a>
Result on the web
<a href="https://cjfs.agriculturejournals.cz/pdfs/cjf/2023/05/05.pdf" target="_blank" >https://cjfs.agriculturejournals.cz/pdfs/cjf/2023/05/05.pdf</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.17221/83/2023-CJFS" target="_blank" >10.17221/83/2023-CJFS</a>

Result language
angličtina
Original language name
Refined approach to the evaluation of heat resistance applied to Enterobacteriaceae in cheese stretching
Original language description
Heat resistance of bacteria is a factor potentially limiting the production of safety foods. We focused on five Enterobacteriaceae strains related to cheese stretching and sub-pasteurisation experimental temperatures of 50–59 °C. Heat resistance was screened and obtained data were fitted to a classical log-linear model with D-values indicating highly heat-resistant strains used. For example in Klebsiella oxytoca S525, D(50)-value was 96.1 min and D(59)-value 5.1 min. In subsequent detailed measurements, the shape of inactivation curves was sigmoid with defined lag, log-linear and stationary phase. We suggest calculating refined D-values (Dr-values) using only data obtained in log-linear phases, namely Dr(temperature; lag phase). In K. oxytoca S525, the obtained results were: Dr(50; 80.9) = 61.7 min, Dr(53; 12.4) = 36.8 min, Dr(56; < 10) = 10.6 min, and Dr(59; < 3) = 4.3 min. The research of particular inactivation phases can provide interesting findings both in science and industrial practice, especially concerning the passage or persistence of hazardous strains in food processing plants.
Czech name
—
Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
40500 - Other agricultural sciences

Project
<a href="/en/project/QK1910121" target="_blank" >QK1910121: Persistence of selected foodborne-diseases agents, hygienic indicators and the possibilities of their elimination from the environment of food processing plants</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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