Objective To understand the enzootic plague epidemic characteristics of Inner Mongolia Spermophilus dauricus plague natural foci in the Cha Ha Er hill-Song Liao plains during 2001-2013, provided a scientific basis for future plague surveillance and management.Methods Collected plague monitoring data from 2001 to 2013 in the Inner Mongolia S. dauricus plague natural foci, used descriptive epidemiological method to analyze the data.Results From 2001 to 2013, 18 937 S. dauricus were captured,rat density was 0....