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Antimicrobial Activity of Plant Extracts Against Salmonella Typhimurium, Escherichia coli O157:H7, and Listeria monocytogenes on Fresh Lettuce

Authors

  • Sung-Youn Kim,

    1. Authors Kim and Kang are with Dept. of Food and Animal Biotechnology, Seoul National Univ., San 56-1, Sillim-dong, Gwanak-gu, Seoul 151-742, Korea. Author Kang is with Dept. of Food Science and Human Nutrition, Washington State Univ., Pullman, WA 99164-6376, U.S.A. Authors Kim, Ha, Hwang, and Kim are with Dept. of Food Science and Biotechnology, Andong National Univ., 388 Songchon-dong, Andong 760-749, Korea. Author Lee is with Inst. of Marine Biotechnology, Andong National Univ., 388 Songchon-dong, Andong 760-749, Korea. Direct inquiries to author Lee (E-mail: lotte@daum.net).
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  • Dong-Hyun Kang,

    1. Authors Kim and Kang are with Dept. of Food and Animal Biotechnology, Seoul National Univ., San 56-1, Sillim-dong, Gwanak-gu, Seoul 151-742, Korea. Author Kang is with Dept. of Food Science and Human Nutrition, Washington State Univ., Pullman, WA 99164-6376, U.S.A. Authors Kim, Ha, Hwang, and Kim are with Dept. of Food Science and Biotechnology, Andong National Univ., 388 Songchon-dong, Andong 760-749, Korea. Author Lee is with Inst. of Marine Biotechnology, Andong National Univ., 388 Songchon-dong, Andong 760-749, Korea. Direct inquiries to author Lee (E-mail: lotte@daum.net).
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  • Jin-Ki Kim,

    1. Authors Kim and Kang are with Dept. of Food and Animal Biotechnology, Seoul National Univ., San 56-1, Sillim-dong, Gwanak-gu, Seoul 151-742, Korea. Author Kang is with Dept. of Food Science and Human Nutrition, Washington State Univ., Pullman, WA 99164-6376, U.S.A. Authors Kim, Ha, Hwang, and Kim are with Dept. of Food Science and Biotechnology, Andong National Univ., 388 Songchon-dong, Andong 760-749, Korea. Author Lee is with Inst. of Marine Biotechnology, Andong National Univ., 388 Songchon-dong, Andong 760-749, Korea. Direct inquiries to author Lee (E-mail: lotte@daum.net).
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  • Yong-Geun Ha,

    1. Authors Kim and Kang are with Dept. of Food and Animal Biotechnology, Seoul National Univ., San 56-1, Sillim-dong, Gwanak-gu, Seoul 151-742, Korea. Author Kang is with Dept. of Food Science and Human Nutrition, Washington State Univ., Pullman, WA 99164-6376, U.S.A. Authors Kim, Ha, Hwang, and Kim are with Dept. of Food Science and Biotechnology, Andong National Univ., 388 Songchon-dong, Andong 760-749, Korea. Author Lee is with Inst. of Marine Biotechnology, Andong National Univ., 388 Songchon-dong, Andong 760-749, Korea. Direct inquiries to author Lee (E-mail: lotte@daum.net).
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  • Ju Young Hwang,

    1. Authors Kim and Kang are with Dept. of Food and Animal Biotechnology, Seoul National Univ., San 56-1, Sillim-dong, Gwanak-gu, Seoul 151-742, Korea. Author Kang is with Dept. of Food Science and Human Nutrition, Washington State Univ., Pullman, WA 99164-6376, U.S.A. Authors Kim, Ha, Hwang, and Kim are with Dept. of Food Science and Biotechnology, Andong National Univ., 388 Songchon-dong, Andong 760-749, Korea. Author Lee is with Inst. of Marine Biotechnology, Andong National Univ., 388 Songchon-dong, Andong 760-749, Korea. Direct inquiries to author Lee (E-mail: lotte@daum.net).
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  • Taewan Kim,

    1. Authors Kim and Kang are with Dept. of Food and Animal Biotechnology, Seoul National Univ., San 56-1, Sillim-dong, Gwanak-gu, Seoul 151-742, Korea. Author Kang is with Dept. of Food Science and Human Nutrition, Washington State Univ., Pullman, WA 99164-6376, U.S.A. Authors Kim, Ha, Hwang, and Kim are with Dept. of Food Science and Biotechnology, Andong National Univ., 388 Songchon-dong, Andong 760-749, Korea. Author Lee is with Inst. of Marine Biotechnology, Andong National Univ., 388 Songchon-dong, Andong 760-749, Korea. Direct inquiries to author Lee (E-mail: lotte@daum.net).
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  • Seon-Ho Lee

    1. Authors Kim and Kang are with Dept. of Food and Animal Biotechnology, Seoul National Univ., San 56-1, Sillim-dong, Gwanak-gu, Seoul 151-742, Korea. Author Kang is with Dept. of Food Science and Human Nutrition, Washington State Univ., Pullman, WA 99164-6376, U.S.A. Authors Kim, Ha, Hwang, and Kim are with Dept. of Food Science and Biotechnology, Andong National Univ., 388 Songchon-dong, Andong 760-749, Korea. Author Lee is with Inst. of Marine Biotechnology, Andong National Univ., 388 Songchon-dong, Andong 760-749, Korea. Direct inquiries to author Lee (E-mail: lotte@daum.net).
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Abstract

Abstract:  Plant extracts have been found to be effective in reducing microorganisms. This study evaluated antimicrobial activity of 12 plant extracts against Salmonella Typhimurium, Escherichia coli O157:H7, and Listeria monocytogenes by using a disk diffusion assay, and Syzygium aromaticum (clove) showed the highest inhibitory effect. To investigate the efficacy of clove extract that inactivates pathogens on lettuce, inoculated lettuce with S. Typhimurium, E. coli O157:H7, and L. monocytogenes was treated with diluted clove extracts or distilled water for 0, 1, 3, 5, and 10 min. Clove extract treatment significantly reduced populations of the 3 tested pathogens from the surface of lettuce.

Practical Application:  This result indicated that clove extract is a useful antimicrobial agent to reduce the microbial level of foodborne pathogens on fresh lettuce. It also might be a natural antimicrobial for reducing or replacing chemical sanitizers in food preservation.

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