关键词: 鼠疫, 宿主动物, 媒介蚤类, 调查

Abstract: Objective To investigate the populations and carried pathogens of plague-related host animals and vector fleas in Yunyang county of the Three Gorges Reservoir Area, and to understand the potential risk of plague occurrence in this region. Methods In April 2018, an investigation was conducted in the cultivated land and residential areas of Yunyang county, Chongqing. Rodents were captured by cage trapping method. Rodents and parasitic fleas collected by comb inspection were identified. Rodent blood was collected for serological testing. Results A total of 8 species of rodents were captured, the total rodent density was 2.52%, capture rate. The indoor and outdoor dominant species were Rattus tanezumi and Apodemus agrarius, respectively. The flea-carrying rate was 50.46% and the total flea index was 4.24, with the dominant flea species Leptopsylla segnis. The free flea index was 0.001. The plague serum antibody was not detected. Conclusion There might be a risk of local epizootic risk with imported plague in Yunyang county of the Three Gorges Reservoir Area, since there exists plague host animal and vector fleas. It implies the need for epizootic plague surveillance program in the county.

Key words: Plague, Host animal, Vector flea, Investigation