Responses of Escherichia coli and Listeria monocytogenes to ozone on non-host tomato: Efficacy of intervention and evidence of induced acclimation

Xiaomei Shu, Manavi Singh, Naga Bhushana R Karampudi, David Bridges, Ai Kitazumi, Vivian C.H. Wu, Benildo de los Reyes

Research output: Contribution to journalArticlepeer-review

Abstract

Because of the continuous rise of foodborne illnesses caused by the consumption of raw fruits and vegetables, effective post-harvest anti-microbial strategies are needed. This study evaluated the dose × time effects on antimicrobial action of ozone (O<sub>3</sub>) gas on the the Gram-negative <i>Escherichia coli</i> <b>O157:H7 and </b>G<b>ram-positive <i>Listeria monocytogenes, </i></b><b>which are common contaminants in fresh produce</b><b><i>. </i></b><b>The study on a non-host tomato environment correlated the dose </b>×<b> time aspects of xenobiosis by examining the correlation between bacterial survival in terms of log-reduction and responses at the level of gene expression</b><b>. In </b><i>E. coli </i><b>O157:H7</b>, low (1 µg O<sub>3</sub>/g of fruit) and moderate (2 µg O<sub>3</sub>/g of fruit) doses <b>caused insignificant reduction in survival, while a high dose (</b>3 µg/g of fruit) caused significant reduction in survival <b>in a time-dependent manner. In <i>L. monocyt
Original languageEnglish
Pages (from-to)e0256324
JournalPLoS ONE
DOIs
StatePublished - Oct 2021

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