关键词: 鼠疫, 宿主, 媒介, 调查

Abstract: Objective To get epidemiological data on plaque hosts and vectors in the areas with a history of the epidemic in Yiwu city, providing a scientific basis for the prevention and control of the epidemic in the city. Methods Rodents were captured in the surveillance sites in the city using live traps, and fleas on them were collected under ether anaesthesia. Rodent liver and spleen were taken for isolation and culture or for PCR detection. Radio immunoassay (RIA) or indirect hemagglutination assay (IHA) was used for serological study. Indices such as rodent capture rate, infection rate and flea index were calculated. SPSS 16.0 software was applied for statistical analysis of the data. Results The average indoor and outdoor rodent capture rate was 1.06% and 1.23%, respectively. The primary indoor rodents were Rattus norvegicus and R. tanezumi, while Eothenomys melanogaster and Apodemus agrarius were the most common outdoor rodents. The flea infection rate was 1.52% with an average flea index of 0.032. No plague were cultured or detected in 7012 rodent samples and 169 flea samples. Plague antibody was detected in 4 out of 6884 samples. Conclusion The composition of plaque hosts and vectors is stable with a low density of rodents and fleas in Yiwu city.However, serological study should be strengthened to be vigilant against imported cases.

Key words: Plague, Host, Vector, Investigation