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- W3029227029 endingPage "108695" @default.
- W3029227029 startingPage "108695" @default.
- W3029227029 abstract "Norovirus (NoV) is the leading cause of epidemic and sporadic gastroenteritis worldwide; a high number of those cases are attributed to the consumption of contaminated food. Crop producers have used several strategies to inactivate the virus present in these products and thus stop the NoV transmission chain. Physical methods such as gamma radiation show excellent results in the inactivation of bacteria, but its effect on NoV has been little studied. This study aimed to evaluate the effect of gamma radiation for NoV inactivation, and over the surface topographic characteristics of strawberry cells, as a prototype of soft fruit. A 10% suspension of GII norovirus-positive stool samples were treated with either 200 mg/L of sodium hypochlorite (NaClO) or gamma-irradiated at doses of 5, 10, 15 and 20 kilograys (kGy). Viral inactivation was determined by measuring the integrity of viral capsid using RNase A alone or in combination with proteinase K followed by RT-qPCR. The effect over cellular surface topology characteristics of the fruit was measured by atomic force microscopy (AFM) and confocal microscopy. High doses of radiation (20 kGy) were necessary to detect a significant (p < 0.05) decrease of up to 1.26 log10 viral copy number. This dose significantly (p < 0.05) raises the root means square roughness (Rq), which affects directly the quality and texture of the product. The gamma irradiation doses tested in this study were not enough to inactivate NoV. The allowed gamma irradiation doses for fresh produce does not alter the surface topology of the fruit, but they affect the content of fluorescent compounds, responsible for the antioxidant activity of the fruit." @default.
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- W3029227029 date "2020-10-01" @default.
- W3029227029 modified "2023-10-12" @default.
- W3029227029 title "Evaluation of gamma irradiation for human norovirus inactivation and its effect on strawberry cells" @default.
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- W3029227029 doi "https://doi.org/10.1016/j.ijfoodmicro.2020.108695" @default.
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