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近年来,我们都以感染剂量的大小来判定哺乳动物对鼠疫菌的敏感性,剂量大小则以感染鼠疫菌后哺乳动物死亡的个体数计算。此外,也常用被感染动物体内感染特征的某些指标如动物患病的时间、菌血症存在与否、强度及持续时间等加以评价。测定哺乳动物的敏感性的这种方法解决了鼠疫动物流行病学方面许多难以重新评价的问题。但是,有些附加因素(菌株性质、感染途径、动物的生理状况、实验操做条件等)的干扰
In recent years, the sensitivity of mammals to Y. pestis has been determined by the size of the infectious dose, and the dosage is based on the number of deaths of mammals after Y. pestis infection. In addition, some indicators of the characteristics of the infected animals such as the time of illness, the presence or absence of bacteremia, the intensity and the duration of infection are also often used. This method of determining mammalian sensitivity solves many of the epidemiological aspects of plague that are difficult to reassess. However, some additional factors (strain nature, route of infection, animal physiological conditions, experimental operating conditions, etc.) interference