[A study on the transmission of plague though seven kinds of fleas in rat type and wild rodent type plague foci in Yunnan].

In order to assess vector position and vector action of seven kinds of fleas in the rat type and wild rodent type plague foci in Yunnan, we studied the indices as: infection rate, rate of feed bacterial emboli, colony transmission vector efficiency, life-span, bloodthirsty to human, body weight, quantity of blood-sucking, rate of dissociation by using animal model and raise film method. The results showed that Xenopsylla cheopis and Neopsylla specialis specialis were the main vectors of two type plague foci. Pulex irritans was an important vector of human plague in Yunnan. This paper reported that Xenopsylla cheopis and Neopsylla special special could twice form bacterial emboli, and with other information about vector efficiency, Index of Pulex irritans, Neopsylla special special, Frontopsylla spadix, Monopsyllus anisus, rate of bloodthirsty to human and life-span of seven kinds of fleas. Reason from quiescence to resuscitate was also deduced and the vector position of Leptopsylla segnis was revised. The vector action of main vector for Ctenophalmus quadratus was negated which proved that Apodemus chevrieri was the main reservoirs in these plague foci.