关键词: 鼠疫, 自然疫源地, 宿主, 媒介

Abstract: The paper reported the result of the investigation on the vegetation type, geographical distribution of host animals, population and composition of plague vectors and their interrelation in the Kang—Bao plague natural foci. It was found that the geographical distribution of Citelus dauricus and Meriones unyuiculatus is crisscross, but don't overlap, the wide distribution of the small size rodents and the poly-host character of the vectors play a link role between two habitats of the different reservoirs or two type communities in the nafural foci. The result of analysis to the epizootic history show that it ispossible to preserve Y. pestis for long time and plague epidemic again in this a rea.