School of Food Science and Technology, Chung-Ang University, Ansung, Republic of Korea.
Food Sci Technol Int. 2018 Jan;24(1):43-52. doi: 10.1177/1082013217726634. Epub 2017 Aug 25.
This study investigated the synergistic effects of sodium hypochlorite (NaClO) and gamma irradiation combination against Vibrio parahaemolyticus in shucked oysters and clams. V. parahaemolyticus decreased to 1.1-5.6 log CFU/g in oysters and 1.1-5.7 logCFU/g in clams by NaClO (20-80 ppm) + γ irradiation (0.1-2.0 kGy) combinations. V. parahaemolyticus was not detected by 60 or 80 ppm NaClO + 2.0 kGy. Synergistic reduction of >1 log was observed by 60 ppm NaClO + 0.3-2 kGy and 80 ppm NaClO + 0.5 or 2 kGy. Specifically, >2 log of the synergistic reduction was obtained by 60 or 80 ppm NaClO + 2 kGy. Furthermore, using the Weibull model, 5D values (5-log reductions) were calculated for 60 or 80 ppm NaClO + 0.5-0.9 kGy. No significant differences were observed for all sensory parameters between samples of 2.0 kGy + 0-80 ppm NaClO. This study suggests that 60 ppm NaClO + 2.0 kGy in reducing 7-log V. parahaemolyticus without any deteriorative changes of sensory qualities could be a potential strategy for post-harvest process in seafood processing and distribution to enhance the microbial safety of molluscan shellfish.
本研究探讨了次氯酸钠（NaClO）和伽马射线联合处理对去壳牡蛎和蛤中副溶血性弧菌的协同作用。在牡蛎中，NaClO（20-80ppm）+γ射线（0.1-2.0kGy）组合可使副溶血性弧菌减少 1.1-5.6 log CFU/g；在蛤中，副溶血性弧菌减少 1.1-5.7 logCFU/g。60 或 80ppm NaClO+2.0kGy 未检出副溶血性弧菌。60ppm NaClO+0.3-2kGy 和 80ppm NaClO+0.5 或 2kGy 观察到协同减少>1 log。60 或 80ppm NaClO+2kGy 可获得>2 log 的协同减少。此外，使用 Weibull 模型，计算了 60 或 80ppm NaClO+0.5-0.9kGy 的 5D 值（5-log 减少）。2.0kGy+0-80ppm NaClO 的所有感官参数之间未观察到显著差异。本研究表明，60ppm NaClO+2.0kGy 可减少 7-log 副溶血性弧菌，而感官质量无任何恶化变化，可能是海产品加工和分配后处理过程中的一种潜在策略，可提高贝类的微生物安全性。
