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首页> 外文期刊>Applied Microbiology >Susceptibility of Murine Norovirus and Hepatitis A Virus to Electron Beam Irradiation in Oysters and Quantifying the Reduction in Potential Infection Risks
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Susceptibility of Murine Norovirus and Hepatitis A Virus to Electron Beam Irradiation in Oysters and Quantifying the Reduction in Potential Infection Risks

机译：鼠诺如病毒和甲型肝炎病毒对牡蛎电子束辐照的敏感性并量化潜在感染风险的降低

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Consumption of raw oysters is an exposure route for human norovirus (NoV) and hepatitis A virus (HAV). Therefore, efficient postharvest oyster treatment technology is needed to reduce public health risks. This study evaluated the inactivation of HAV and the NoV research surrogate, murine norovirus-1 (MNV-1), in oysters ( Crassostrea virginica ) by electron beam (E-beam) irradiation. The reduction of potential infection risks was quantified for E-beam irradiation technology employed on raw oysters at various virus contamination levels. The E-beam dose required to reduce the MNV and HAV titer by 90% (D_(10) value) in whole oysters was 4.05 (standard deviations [SD], ±0.63) and 4.83 (SD, ±0.08) kGy, respectively. Microbial risk assessment suggests that if a typical serving of 12 raw oysters was contaminated with 10~(5) PFU, a 5-kGy treatment would achieve a 12% reduction (from 4.49 out of 10 persons to 3.95 out of 10 persons) in NoV infection and a 16% reduction (from 9.21 out of 10 persons to 7.76 out of 10 persons) in HAV infections. If the serving size contained only 10~(2) PFU of viruses, a 5-kGy treatment would achieve a 26% reduction (2.74 out of 10 persons to 2.03 out of 10 persons) of NoV and 91% reduction (2.1 out of 10 persons to 1.93 out of 100 persons) of HAV infection risks. This study shows that although E-beam processing cannot completely eliminate the risk of viral illness, infection risks can be reduced.
机译：食用生牡蛎是人类诺如病毒（NoV）和甲型肝炎病毒（HAV）的暴露途径。因此，需要有效的捕捞后牡蛎处理技术以减少公共卫生风险。这项研究评估了牡蛎（Crassostrea virginica）中电子束（电子束）辐照下HAV的灭活和NoV研究替代品鼠类诺如病毒-1（MNV-1）。对于在各种病毒污染水平下用于生牡蛎的电子束辐照技术，量化了潜在感染风险的降低。将整个牡蛎的MNV和HAV滴度降低90％（D_（10）值）所需的电子束剂量分别为4.05（标准偏差[SD]，±0.63）和4.83（SD，±0.08）kGy。微生物风险评估表明，如果通常食用的12只生牡蛎受到10〜（5）PFU的污染，则5-kGy处理可使NoV降低12％（从10人中的4.49降至10人中的3.95）感染，HAV感染减少了16％（从10人中的9.21降低到10人中的7.76）。如果份量仅包含10〜（2）PFU病毒，则5-kGy处理将使NoV降低26％（从10人中的2.74降低到10人中的2.03），并且NoV降低91％（10中的2.1）至100人中有1.93人患有HAV感染风险。这项研究表明，尽管电子束加工不能完全消除病毒性疾病的风险，但可以降低感染风险。

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