Impact of gelatin nanogel coating containing thymol and nisin on the microbial quality of rainbow trout fillets and the inoculated Listeria monocytogenes

Aquaculture ResearchVolume 52, Issue 8 p. 3958-3965 ORIGINAL ARTICLE Impact of gelatin nanogel coating containing thymol and nisin on the microbial quality of rainbow trout fillets and the inoculated Listeria monocytogenes Fatemeh Mohajer, Department of Food Hygiene and Aquaculture, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, IranSearch for more papers by this authorSaeid Khanzadi, orcid.org/0000-0003-0106-587X Department of Food Hygiene and Aquaculture, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, IranSearch for more papers by this authorKobra Keykhosravy, Department of Food Hygiene and Aquaculture, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, IranSearch for more papers by this authorSeyyed Mohammad Ali Noori, Toxicology research center, Medical basic sciences research institute, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, IranSearch for more papers by this authorMohammad Azizzadeh, Department of Clinical Sciences, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, IranSearch for more papers by this authorMohammad Hashemi, Corresponding Author mo_hashemi@hotmail.com orcid.org/0000-0001-9998-6727 Medical Toxicology Research Center, Mashhad University of Medical Sciences, Mashhad, Iran Department of Nutrition, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran Correspondence Mohammad Hashemi, Department of Nutrition, Faculty of Medicine, Mashhad University of Medical Sciences, Azadi Square, Mashhad, Iran. Email: mo_hashemi@hotmail.comSearch for more papers by this author Fatemeh Mohajer, Department of Food Hygiene and Aquaculture, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, IranSearch for more papers by this authorSaeid Khanzadi, orcid.org/0000-0003-0106-587X Department of Food Hygiene and Aquaculture, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, IranSearch for more papers by this authorKobra Keykhosravy, Department of Food Hygiene and Aquaculture, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, IranSearch for more papers by this authorSeyyed Mohammad Ali Noori, Toxicology research center, Medical basic sciences research institute, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, IranSearch for more papers by this authorMohammad Azizzadeh, Department of Clinical Sciences, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, IranSearch for more papers by this authorMohammad Hashemi, Corresponding Author mo_hashemi@hotmail.com orcid.org/0000-0001-9998-6727 Medical Toxicology Research Center, Mashhad University of Medical Sciences, Mashhad, Iran Department of Nutrition, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran Correspondence Mohammad Hashemi, Department of Nutrition, Faculty of Medicine, Mashhad University of Medical Sciences, Azadi Square, Mashhad, Iran. Email: mo_hashemi@hotmail.comSearch for more papers by this author First published: 04 April 2021 https://doi.org/10.1111/are.15239Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onEmailFacebookTwitterLinked InRedditWechat Abstract This study aimed to assess the effects of edible gelatin nanogel coating containing thymol and nisin on the inhibition of microbial flora and inoculated Listeria monocytogenes in fish fillets during a 12-day storage period at the temperature of 4°C. Data were collected and analysed on several factors of microbiological change, including total viable count, total psychrophilic count, lactic acid bacteria and hydrogen sulphide-producing bacteria count, and the inhibitory effects of the coating on inoculated Listeria monocytogenes were determined during 3-day intervals. The highest reduction rate of total viable bacteria (0.95 log CFU/g), total psychrophilic (0.92 log CFU/g), Hydrogen sulfide producing bacteria (0.66 log CFU/g), lactic acid bacteria (0.95 log CFU/g) and L. monocytogenes count (0.65 log CFU/g) were observed in gelatin nanogel containing thymol and nisin in comparison with control samples. Furthermore, the separate use of these compounds led to the significant growth inhibition of the bacteria compared with the control. Therefore, it was concluded that the gelatin nanogel coating without an antimicrobial agent could not be effective in bacterial growth control, and the added thymol and nisin would be beneficial in the preservation of foods such as fish and its products. Open Research DATA AVAILABILITY STATEMENT Data is available upon request Volume52, Issue8August 2021Pages 3958-3965 RelatedInformation