Effect of UVC‐LED and ultrasound alone and combined on heat‐resistant Escherichia coli isolated from pasteurised milk

Effect of UVC‐LED and ultrasound alone and combined on heat‐resistant Escherichia coli isolated from pasteurised milk

We aimed at characterising the nonthermal technologies resistance profile of two Escherichia coli strains isolated from pasteurised milk and described as moderate‐to‐high heat resistance (MHR) (60°C/6 min) harbouring or not a transmissible locus of stress tolerance (tLST). The characterisation was c...

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Veröffentlicht in:International journal of dairy technology 2023-02, Vol.76 (1), p.74-80
Hauptverfasser: Machado, Maxsueli Aparecida Moura, Castro, Vinicius Silva, Monteiro, Maria Lúcia Guerra, Bernardo, Yago Alves de Aguiar, Figueiredo, Eduardo Eustáquio de Souza, Conte‐Junior, Carlos Adam
Format: Artikel
Sprache:eng
Schlagworte:
Central composite rotatable design
Dairy products
E coli
Escherichia coli
Heat resistance
Heat treatment
Light emitting diodes
Sonication
Synergism
Thermal resistance
Transmissible locus of stress tolerance
Ultrasound
Ultraviolet‐C light‐emitting diodes
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Zusammenfassung:We aimed at characterising the nonthermal technologies resistance profile of two Escherichia coli strains isolated from pasteurised milk and described as moderate‐to‐high heat resistance (MHR) (60°C/6 min) harbouring or not a transmissible locus of stress tolerance (tLST). The characterisation was carried out applying optimised conditions of ultraviolet‐C light‐emitting diodes (UVC‐LED) (4950 mJ/cm2), ultrasound (US) (299 W) and their combination (UVC‐LED + US). Both strains were more sensitive to UVC‐LED (4.5–1.5 log cfu/mL) than to US (
ISSN:1364-727X
1471-0307
DOI:10.1111/1471-0307.12925