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两株Pst1-野生型鼠疫菌的生物学特性
BIOLOGICAL ACTIVITY OF THE TWO WILD-TYPE YERSINIA PESTIS STRAINS WITHOUT PSTL
【摘要】 <正> Pstl 是鼠疫菌产生的一种细菌素,此种物质可抑制血清型1型假结核菌生长。除苏联少数鼠疫自然疫源地循环着 Pstl~-的野生型鼠疫菌外、从世界各疫源地所分离到的野生型鼠疫菌中绝大多数都能产生 Pstl。在我国,到目前为止仅发现两株不产生 Pstl 的野生型鼠疫菌。
【Abstract】 Biological activity of the two wild types Y.pestis strains(pstl~-)is descri-bed.The two wild-type Y.pestis strains without pstl were first found inChina.Their biological characteristics were as follows:acid but gas was prod-uced from glucose,arabinose,salicin,rhamnose,melibiose,and glycerol;there was no fermentation of sucrose,lactose,and sorbit;urea was not hydroly-sed.They had ability for nitrate reduction。The expression of virulence fact-ors was characterized by wva~+,Fra~+,pstl~-,and pgm~+.The nutrient require-ment is Trp and Thr.The two strains not possessed plasmid of about 6megadaltons.They did not produce pstl,but it was sensitive to pstl.The two Y.pestis strains were obtained from the east sector of North Tianshan mountaindurig 1969-1970.In China,it is unusual for us to find two wild-type strains of Y.pestis without pstl in natural foci of plague.
【Key words】 Biological activity; Yersinia Pestis strains;
- 【文献出处】 中国地方病学杂志 ,Chinese Journal of Endemiology , 编辑部邮箱 ,1988年02期
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