鼠疫是一种自然疫源性疾病 ,历史上鼠疫在世界范围内 ,曾出现过三次大流行 ,每次流行持续流行几十年甚至上百年 ,所造成的危害并不亚与战争给人类带来的灾难。进入 2 0世纪 80年代 ,许多国家和地区的鼠疫疫情再次活跃 ,动物间鼠疫流行范围和流行强度逐年扩大和增强。到 90年代 The plague is a natural foci of disease. Historically, the plague has occurred in the world. There have been three pandemic periods. Each epidemic has been on the rise for decades or even hundreds of years. The harm caused is no different from that brought by the war to mankind. Disaster. In the 1980s, plague outbreaks were active again in many countries and regions. The epidemic range and prevalence of plague among animals expanded and intensified year by year. To the 90’s