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J.A. Waitt, D.D. Kuhn, G.E. Welbaum and M.A. Ponder Postharvest transfer and survival of Salmonella enterica serotype enteritidis on living lettuce Letters in Applied Microbiology 58

Version of Record online: 23 OCT 2013 | DOI: 10.1111/lam.12170

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Significance and Impact of the Study: Hydroponically grown lettuce packaged in plastic clamshells with intact roots, marketed as ‘living lettuce’, is increasing in popularity due to its extended shelf life. This study demonstrates the transfer of Salmonella from contaminated worker hands and contaminated roots to leaves where it persisted at 4°C for 18 day. Temperature abuse (12°C) increased Salmonella on roots and leaves. These findings suggest that failure to maintain temperatures below 12°C can pose a risk for consumers purchasing living lettuce at markets where recommended storage temperatures are not maintained.

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