Isolation and identification of twoSerratia marcescensstrains from silkworm,Bombyx mori

文献类型： 外文期刊

第一作者： Zhang, Yiling

作者： Zhang, Yiling;Shang, Ruisha;Zhang, Jiao;Li, Junhao;Zhu, Guanyu;Yao, Mingshuai;Sun, Jiancheng;Shen, Zhongyuan;Zhang, Yiling;Shen, Zhongyuan;Zhang, Yiling;Shen, Zhongyuan;Zhang, Yiling

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关键词： Silkworm; Serratia marcescens; Septicemia; Pigment

期刊名称：ANTONIE VAN LEEUWENHOEK INTERNATIONAL JOURNAL OF GENERAL AND MOLECULAR MICROBIOLOGY （ 影响因子：2.271； 五年影响因子：2.707 ）

ISSN： 0003-6072

年卷期： 2020 年 113 卷 9 期

页码：

收录情况： SCI

摘要： Bacterial septicemia commonly occurs and usually cause huge losses in sericulture industry. Here, two pathogenic bacterial strains were isolated from dead silkworm and named as ZJ-1 and ZJ-2. Phenotypic and genotypic analysis results revealed that both of these two strains are closely related toSerratia marcescens(S. marcescens). The morphological as well as physiological and biochemical characteristics of ZJ-1 were accordant withS. marcescensmentioned in Bergey's manual of determinative bacteriology, whereas ZJ-2 showed some discrepancies such as the utilization of malonate and starch, fermentation of maltose and sucrose, and tests of urease, etc. Surprisingly, ZJ-2 could produce red pigment at high temperature (37 degrees) but ZJ-1 could not. Besides, by analyzing the lethal concentration 50 (LC50) of ZJ-1 and ZJ-2, it was found that the virulence of ZJ-2 was lower than that of ZJ-1. These results revealed that ZJ-1 and ZJ-2 were two different strains ofS. marcescensand that ZJ-2 was expected to be a safe (low-toxicity) and efficient strain for the production of red pigment. Nonetheless, further research in molecular level is needed to understand the regulation mechanism of pigment production and infection of ZJ-2.

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