Inactivation of norovirus by atmospheric pressure plasma jet on salmon sashimi.
This study investigated atmospheric pressure plasma (APP) jet, an emerging novel non-thermal technology, for the inactivation of human norovirus (NoV) on salmon sashimi. The influences of the non-thermal plasma on quality attributes of sashimi were also evaluated. Air, O2, and N2 (15 L/min) were used to produce the plasma jets. N2 plasma treatment for 12 min reduced NoV viral load (VL) (initial inoculums of 2.7 × 104 copies/g) by 2.17 × 104 copies/g, while air-based or O2-based plasma treatment for 9-12 min could reduce the VL to undetectable levels (below 100 copies/g). Under the same operating condition, the air-based or O2-based plasma treatment might increase slightly TBARS values in sashimi, yet the values (far below 1.0 mg MDA/kg) were within acceptable level for sashimi made with salmon fishes. The APP jets (APPJ) treatments could also retain the pH of sashimi at normal levels (6.29 ~ 6.02) to maintain the quality of salmon sashimi, the color quality of which was not affected evidently. The plasma-induced hardness and springiness changes in salmon sashimi were substantially low. These results suggested APPJ could be implemented as technology for inactivation of food-borne viruses and exhibited a high potential for application in fish sashimi processing, retaining product quality as well.
['Huang|Yi-Ming|YM|', 'Chang|Wei-Chih|WC|', 'Hsu|Chuan-Liang|CL|']
D000818:Animals D001274:Atmospheric Pressure D006801:Humans D029322:Norovirus D012474:Salmon D017747:Seafood
Norovirus Salmon sashimi Non-thermal atmospheric plasma jet Quality evaluation