%0 Journal Article
%T Identification of a pathogenic strain of locusts and its toxicity and pathology<br>一株蝗虫病原菌的鉴定及其毒力和病理研究
%A JIN Hong GE Shao-rong TAO Yong RAN Hong-yan LIU Shi-gui
%A <br>金虹
%A 葛绍荣
%A 陶勇
%A 冉红艳
%A 刘世贵
%J 微生物学报
%D 2005
%I 
%X A pathogen was isolated from naturally dead grasshoppers. Its pathogenicity was testified by law of KOCH. It was identified as Serratia marcescens by physiological, biochemical test and molecular systematic analysis. Toxicity of HR-3 to grasshoppers was assayed by means of oral infection. The results show that the linear regression relationship between the logarithm(y) of HR-3 concentration and the probability (x) of corrected grasshopper morality is y = 1.067 + 0.809x, and the median lethal concentration is LC50 = 1.164 x 10(8) cfu/mLo The infection mechanism of HR-3 to grasshoppers were also studied. The histopathological studies show that midgut epithelia are damaged at the beginning of infection, and then partial denaturalization and putrescence occurr in this area. After 48h infection, vacuoles appear in most regions of midgut epithelia.
%K Serratia marcescens
%K Identification
%K Toxicity
%K Pathology
%K Locusts<br>粘质沙雷氏菌，鉴定，毒力，病理，蝗虫
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=A3C6BA55AB623B90FA9104CFFC826F3C&aid=ED66C8EC35075120&yid=2DD7160C83D0ACED&vid=94E7F66E6C42FA23&iid=0B39A22176CE99FB&sid=9D453329DCCABB94&eid=5BC9492E1D772407&journal_id=0001-6209&journal_name=微生物学报&referenced_num=8&reference_num=18