关键词: 鼠疫, 染疫蚤

Abstract: Objective To master species and composition of naturally infected plague fleas,relations between the fleas and their hosts,so as to inquire into each vector's status as propagating plague. Methods Collecting data of plague surveillance from 1953 to 2003,and analyzing statistically. Results 3 species of naturally infected fleas were determined,of which Rhadinopsylla rothschildi are identified as infected plague species for the first time in China. Conclusion The main vector is Nosopsyllus laeviceps kuzenkovi. Citellophilus tesquorum mongolicus and Rhadinopsylla rothschildi are secondary vectors,but they play a certain role in the plague epizootic prevalent and continuity.