Isolation and Identification of a Pathogen of Silkworm Bombyx mori

文献类型： 外文期刊

第一作者： Tao, Heng-Ping

作者： Tao, Heng-Ping;Shen, Zhong-Yuan;Zhu, Feng;Xu, Xiao-Fang;Tang, Xu-Dong;Shen, Zhong-Yuan;Xu, Li

作者机构：

关键词： sucrose: 57-50-1;D-mannose: 3458-28-4;D-glucose: 50-99-7;L-arabinose: 5328-37-0;sodium citrate: 994-36-5;malonate: 156-80-9;D-fructose: 57-48-7;species identification;biochemical property;physiological property

期刊名称：CURRENT MICROBIOLOGY （ 影响因子：2.188； 五年影响因子：2.197 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： A pathogenic bacterial strain, ST-1, was isolated from a naturally infected silkworm. The strain was identified on the basis of its physiological and biochemical properties and the results of sequence analysis of its 16S rRNA gene. The results of the 16S rRNA gene sequence analysis revealed that ST-1 shared the highest sequence identity (more than 99%) with Pseudomonas chlororaphis subsp. aurantiaca. ST-1 bacteria were gram-negative and 0.7-0.9 x 1.3-1.5 mu m long, short rods with rounded ends. The strain could utilize sodium citrate, malonate, d-glucose, sucrose, d-fructose, d-mannose, and l-arabinose. Pathogenicity of ST-1 for silkworm could be depicted as a linear regression of the logarithm (y) of ST-1 concentration against probability (x) (y = 0.4040 + 0.0600x). The median lethal concentration (LC50) was 2.12 x 10(4) cfu/ml. In conclusion, ST-1 was identified as Ps. chlororaphis subsp. aurantiaca. This is the first report that Ps. aurantiaca is a pathogen for silkworm Bombyx mori.

分类号： Q93

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