Effect Of Chitosan And Vanillin Coating On Quality, Chemical, And Microbial Characteristics Of Eggs Under Ambient And Refrigerated Storage Conditions
DOI:
https://doi.org/10.48165/ijapm.2026.42.1.10Keywords:
Chitosan, Vanillin, Egg quality, Shelf life, Storage temperature, Natural preservatives, Haugh unit, Microbial qualityAbstract
Poultry egg preservation is a burning issue in poultry business although it is a problem that is not well addressed in areas which lack cold storage facilities. Natural coating materials promise good alternatives to the traditional preservation techniques. The current research determined the impact of the chitosan and vanillin coating on the physical, chemical, and microbiological quality of the chicken eggs stored at ambient (25±2°C) and refrigerated (4±1°C) temperatures. 540 freshly laid eggs were randomly allocated into 2×3×4 factorial design in a completely randomized allocation. The treatments were two storage temperatures (ambient and refrigerated), three types coating (uncoated control, 1.5% chitosan and 0.5% vanillin), and four storage times (0, 10, 20, and 30 days). Measured parameters were weight loss, Haugh unit, shell strength, yolk index, pH, protein content, lipid oxidation, total bacterial count, coliform count and yeast and mold count. Chitosan coating had a significant effect on weight loss (P<0.01) than control and vanillin treatments in both of the storage conditions. Eggs covered with chitosan stored refrigerated had Haugh units of more than 72, as compared to those without the coating stored ambiently that dropped down to 45.3±2.1. Storage in refrigeration with chitosan the best quality of eggs was maintained with our refrigerated storage with chitosan coating as it was able to maintain eggs with acceptable levels of microorganisms (TBC <4.5 log CFU/egg) during storage. Vanillin coating showed a moderate preservation effect, especially in the control of microbial growth. Chitosan coating with refrigerated storage offered better preservation of egg parameters of quality. Nevertheless, ambient temperature chitosan coating also added shelf life of 10-15 days over non-coated eggs, which provides functional implementations to resource-constrained environments.References
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