Understanding inactivation of Listeria monocytogenes and Escherichia coli O157:H7 inoculated on romaine lettuce by emulsified thyme essential oil.
In: Food Microbiology, Jg. 105 (2022-08-01), S. N.PAG
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Zugriff:
Effects of thyme essential oil (TEO) emulsion (TEE) with cationic charge formulated using cetylpyridinium chloride (CPC) on attachment strength and inactivation of Listeria monocytogenes and Escherichia coli O157:H7 on romaine lettuce surface were examined in this study. Regardless of the inoculation time (2 h and 24 h), pathogen attachment was stronger on the adaxial surface of the romaine lettuce than on the abaxial surface because of the lower roughness of the former. Moreover, attachment strength increased with increasing inoculation time. TEE washing had the strongest inhibitory effect on pathogen attachment at 2 h when compared with that of TEO, CPC, and sodium hypochlorite (SH), demonstrating a 3.32 and 2.53 log-reduction in the size of the L. monocytogenes and E. coli O157:H7 populations, respectively, compared to the control samples. Additionally, the TEE washing effects were maintained even after inoculation for 24 h, and it decreased attachment to adaxial surface of the samples. These results indicate that TEE could be a good alternative to SH in improving the microbiological safety of romaine lettuce. • Thyme essential oil emulsion (TEE) was applied to inactivate pathogens on romaine. • TEE showed greater inactivation effect than other treatments in confocal analysis. • In addition, TEE as a sanitizer effectively eliminated pathogens on romaine. • TEE also reduced attachment strength of pathogens on romaine surface the most. • Thus, TEE can be used as a good sanitizing agent for improving safety of romaine. [ABSTRACT FROM AUTHOR]
Titel: |
Understanding inactivation of Listeria monocytogenes and Escherichia coli O157:H7 inoculated on romaine lettuce by emulsified thyme essential oil.
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Autor/in / Beteiligte Person: | Kang, Ji-Hoon |
Zeitschrift: | Food Microbiology, Jg. 105 (2022-08-01), S. N.PAG |
Veröffentlichung: | 2022 |
Medientyp: | academicJournal |
ISSN: | 0740-0020 (print) |
DOI: | 10.1016/j.fm.2022.104013 |
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