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Combined antibacterial effect of 460 nm light-emitting diode illumination and chitosan against Escherichia coli O157:H7, Salmonella spp. and Listeria monocytogenes on fresh-cut melon, and the impact of combined treatment on fruit quality

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Abstract

This study evaluated the combined antibacterial effect of 460 nm LED illumination and chitosan on Escherichia coli O157:H7, Salmonella spp. and Listeria monocytogenes on fresh-cut melon surface and its impact on the quality of melon at a total dose of 2.4 kJ/cm2 at 4 and 10 °C. Results showed that the antibacterial effect of LED illumination in combination with chitosan (0.5 and 1.0%) was much better than that of LED illumination alone, showing their synergistic effect. Among the pathogens, L. monocytogenes was the most susceptible pathogen to LED illumination. Although the color of melons became paler after LED illumination, there was little to no change in ascorbic acid content, total flavonoid content, or antioxidant capacity of the illuminated fruits compared with non-illuminated fruits. Thus, these results suggest that chitosan-mediated 460 nm LED illumination could be applied to inactivate foodborne pathogens on fresh-cut melons during storage at food establishments.

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Acknowledgements

This work was supported by the National Research Foundation of Korea (NRF) Grant funded by the Korea government (MSIT) (No. 2019R1F1A1060624).

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Author notes

  1. Seok-Gyu Lee and Su-Jin Kim have contributed equally to this study.

Authors and Affiliations

  1. Department of Food Science and Technology, Korea National University of Transportation, 61 Daehak-ro, Jeungpyeong-gun, Chungbuk, 27909, Korea

    Seok-Gyu Lee & Hyun-Gyun Yuk

  2. Department of Food and Nutrition, Yeungnam University, 280 Daehak-ro, Gyeongsan-si, Gyeongsangbuk-do, 38541, Korea

    Su-Jin Kim & Woo-Suk Bang

Authors
  1. Seok-Gyu Lee
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  2. Su-Jin Kim
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  3. Woo-Suk Bang
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  4. Hyun-Gyun Yuk
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Correspondence to Woo-Suk Bang or Hyun-Gyun Yuk.

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Lee, SG., Kim, SJ., Bang, WS. et al. Combined antibacterial effect of 460 nm light-emitting diode illumination and chitosan against Escherichia coli O157:H7, Salmonella spp. and Listeria monocytogenes on fresh-cut melon, and the impact of combined treatment on fruit quality. Food Sci Biotechnol 33, 191–202 (2024). https://doi.org/10.1007/s10068-023-01324-y

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