Objectives To ascertain the ecological characteristics of hosts and vectors of plague in Xinghai County,Qinghai Province following an outbreak of pneumonic plague and to discuss the epidemiological significance of plague prevention and control. Method An epidemiological field study was conducted to investigate the distribution and density of animal hosts and flea vectors of the plague in Xinghai County,Qinghai Province in light of an outbreak of pneumonic plague in the SanJiangYuan region.The ecological cha...