中国鼠疫菌含有的最大一类质粒的变异及地理分布

Variation and geographic distribution of the largest kind plasmid in Yersinia pestis

绝大多数鼠疫耶尔森菌都含有三种质粒,其分子量为6Mdal、45Mdal 和 65Mdal。鼠疫耶尔森菌含有的最大一类质粒的变异很大。多数学者报道鼠疫耶尔森菌所含大质粒的分子量为65Mdal;苏联学者(1983年)

The variation of the largest kind plasmid harboured by Yersinia pestis isstudied.Their molecular mass is 52,65 and 92-Mdal respectively.The strainsthat carry 65-Mdal plasmid distribute in each natural plague foci in China.Butfor the strains of carring 52 or 92-Mdal plasmid are limited in some specificccotypes.Their epidemiological significance was analysed.