Chitin Oligosaccharide N, N ′-Diacetylchitobiose (GlcNAc 2 ) as Antimicrobial Coating against Listeria monocytogenes on Ready-to-Eat Shrimp

Munira Zainal Abidin (), Konstantina Kourmentza () and Keshavan Niranjan
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Munira Zainal Abidin: Department of Technology and Natural Resources, Faculty of Applied Sciences and Technology, KM1 UTHM Pagoh Campus, Universiti Tun Hussein Onn Malaysia, Pagoh 84600, Johor, Malaysia
Konstantina Kourmentza: Department of Chemical and Environmental Engineering, The University of Nottingham, University Park, Nottingham NG7 2RD, UK
Keshavan Niranjan: Department of Food and Nutritional Sciences, University of Reading, Whiteknights, Reading RG6 6AP, UK

Sustainability, 2023, vol. 15, issue 13, 1-11

Abstract: N , N ′-diacetylchitobiose, also known as GlcNAc 2 , is a chitin oligosaccharide and is reported to possess antimicrobial activity against pathogenic bacteria. In this study, 1% ( w / v ) GlcNAc 2 solution was applied on ready-to-eat (RTE) shrimp and evaluated as an antimicrobial coating against Listeria monocytogenes during storage at 4 °C for 16 days. Texture properties, colour, TBARS values, moisture content and bacterial counts were monitored and analysed every four days. The results indicated that the GlcNAc 2 coating retarded the changes in texture properties, TBARS values and moisture content of the RTE shrimp during storage. The presence of GlcNAc 2 showed no significant changes in RTE shrimp colour in contrast to the control. However, the growth of L. monocytogenes inoculated on the GlcNAc 2 -coated RTE shrimp was slower than that of the control sample with the highest log reduction of 0.5 log CFU/mL being observed. This study showed that the GlcNAc 2 used as an antimicrobial coating was able to inhibit the growth of L. monocytogenes , while maintaining the quality of the RTE shrimp during refrigerated storage.

Keywords: chitin oligosaccharides; N , N ?-diacetylchitobiose; antimicrobial; ready-to-eat shrimp; Listeria monocytogenes (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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