内蒙古高原长爪沙鼠鼠疫自然疫源地内动物鼠疫主要的流行特点之一，就是随着长爪沙鼠数量的增加，出现动物鼠疫的流行。流行时长爪沙鼠的平均密度一般都在每公顷10只以上，有的地区密度高时可超过30只。因此往往把长爪沙鼠的数量变化作为预测动物鼠疫流行的主要指标。然而，由? One of the main epidemic characteristics of animal plague in the natural foci of Meriones unguiculatus in Inner Mongolia Plateau is that as the number of Meriones unguiculatus increases, the prevalence of animal plague appears. Popular time-dependent gerbils are generally average density of more than 10 per hectare, in some areas may be more than 30 high-density. Therefore, the number of Mongolian gerbils is often used as a predictor of animal plague prevalence. However, by?