关键词: 云南, 感染, 鼠疫, 媒介生物

Abstract: Objective To master the distribution and seasonal abundance of infected plague vectors in the two types of plague natural foci of Yunnan province. Methods To Collect and check the relevant data on plague surveillance and investigationfrom 1974 to 2006 and analyze it by SPSS 13.0 software. Results There were 8 species of natural infected plague arthropods in the plague natural focus of Rattus flavipectus, i.e. Xenopsylla cheopis and Leptopsylla segnis, et al. Of which, X.cheopis was the main vector. 618 strains of Yersinia pestis were accumulatively isolated from X.cheopis from 1982 to 2006, accounted for 92.65% of the total strains of Y.pestis isolated from fleas. There were 7 species of natural infected plague arthropods in the plague natural focus of Apodemus chevrieri such as Eothenomys miletus miletus, Neopsylla specialis specialis and Ctenophthalmus quadratus, et al. Recently, the epidemic fleas was found in Yulong couty. 14 strains of Y.pestis were respectively isolated from N.specialis specialis and Stivalius aporus from 1974 to 2006, accounted for 15.56% respectively. X.cheopis and N.specialis specialis are the respectively major plague vector of two types plague natural focus. The strains of Y.pestis isolated from fleas in R.flavipectus natural focus centralized in June to August, highest in August. The season fluctuation of vector on investigation and surveillance were in accord with the plague natural focus of A.chevrieri & E.miletus miletus, showing two peak and centralizing in April and December. Conclusion There are respective epizoological characters about distribution and season fluctuation because of different vectors in two types of plague focus.