The Thermal Stability of Influenza Viruses in Milk

文献类型： 外文期刊

第一作者： Hu, Wanke

作者： Hu, Wanke;Ju, Xianghong;Hu, Wanke;Chen, Yunxia;Wu, Siyu;Wei, Wen-Kang;Yu, Jieshi;Wang, Zhao;Chen, Yunxia;Li, Tianyu;Zhai, Shao-Lun;Sun, Yipeng

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关键词： influenza virus; milk; pasteurization; inactivation

期刊名称：VIRUSES-BASEL （ 影响因子：3.5； 五年影响因子：3.7 ）

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年卷期： 2024 年 16 卷 11 期

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收录情况： SCI

摘要： Highly pathogenic avian influenza viruses (HPAIVs) of the H5N1 subtype (clade 2.3.4.4b) have been detected in raw milk from infected cows. Several studies have examined the time and temperature parameters to ascertain whether influenza viruses in milk can be inactivated completely under commercial pasteurization conditions, yielding conflicting results. This study aimed to investigate whether milk could help protect influenza viruses from heat treatment. After heat treatment at 49 degrees C for one hour, the titer reduction of the influenza A/WSN/1933 (A/H1) virus in milk was approximately 1.6 log10TCID50/mL, which was significantly lower than that (3 log10TCID50/mL) observed in the Dulbecco's Modified Eagle Medium (DMEM) control media. The influenza D/bovine/CHN/JY3002/2022 (D/Yama2019) virus in milk retained a high residual infectivity (4.68 x 103 log10TCID50/mL) after treatment at 53 degrees C; however, the virus in DMEM completely lost its infectivity under the same conditions. Moreover, the influenza A/chicken/CHN/Cangzhou03/2023 (A/H5) virus in DMEM could be inactivated completely using any of the three heat treatment methods: 63 degrees C for 30 min, 72 degrees C for 15 s, or 80 degrees C for 15 s. For the virus present in milk, only heat treatment at 80 degrees C for 15 s completely inactivated it. These results suggest that milk prevents influenza viruses from pasteurization inactivation.

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