The results of studies of a newly isolated Serratia species K-57 strain are presented. The strain is characterized by antiviral activity towards human influenza A/Aichi/2/68/H3N2, vaccinia, mouse smallpox, and herpes simplex-2 viruses. The detected characteristics of the strain, including the data on activities on nucleolytic enzymes, recommend it for the development of therapeutic and preventive antiviral drugs.

中文翻译：

---

沙雷氏菌新种K-57菌株代谢产物抗病毒活性研究

介绍了新分离的沙雷氏菌种 K-57 菌株的研究结果。该菌株的特点是对人流感 A/Aichi/2/68/H3N2、牛痘、小鼠天花和单纯疱疹 2 病毒具有抗病毒活性。该菌株的检测特征，包括核溶解酶活性的数据，建议将其用于治疗和预防性抗病毒药物的开发。