关键词: 鼠疫, 宿主动物, 调查

Abstract: Objective To understand the species composition and quantitative distribution of the dominant host animals and plague vector fleas, and the infections of host animals with Yersinia pestis in Wanzhou and Fuling sections of the Three Gorges Reservoir Area to determine whether there existed plague foci or not. Methods Rodents captured by cages and fleas collected with sticky papers, were identified with the flea-carrying rate and flea index calculated. The plague F1 antibody from host animals was detected with IHA. Results (1)Host animals: one hundred and seventy rodents were captured in Wanzhou with a rodent density of 3.20% and 303 rodents in Fuling with a density of 5.95%.(2)Flea index: one hundred fifty-one fleas were caught in Wanzhou with a flea-carrying rate of 22.94% on rodents, the total flea index being 0.888. Sixty-four fleas were caught in Fuling with a flea- carrying rate of 7.59%, the total flea index being 0.211.(3)The free flea index: three thousand sticky papers were placed and 6 fleas were captured in Wanzhou with a total flea index of 0.002. No fleas were captured in Fuling with the same method.(4)The plague serological examination: in Wanzhou and Fuling sections, no plague F1 antibody was detected. Conclusion Wanzhou and Fuling sections are not plague foci where no plague has occurred, but based on the information of geographical landscape, host animals, vector insects and epidemiological investigation, it is likely that the plague epidemic may occur in the sections.

Key words: Plague, Host animal, Investigate