Taking the ecogeographical data into acount, the authors consider the surveyed area to be a natural focus of plague with the marmot M.baibacina as the main rservoir.

合其它生态地理资料,判定沙湾县山地前山带鹿角湾疫自然疫源地,并认为是以灰旱獭为主要贮宿主的单宿主疫疫源地。