关键词: 鼠疫, 宿主, 密度, 病媒生物, 分析

Abstract: Objective To analyze the status on plague hosts, vectors and their densities in Baoshan city, in order to provide scientific evidences for preventing and controlling plague. Methods The cages and rat clips were used for capturing the rodents at township surveillance sites among the 5 counties, Baoshan city, and the densities of rodents, flea index, and the percent of rodents carrying fleas were calculated. Plague F1 antibody was tested by IHA. The rodents' liver-and spleen-tissue were cultured for the Yersinia pestis. R version 3.4.2 software was used for analyzing the data. Results A total of 19 504 rodents were captured, belonging to 3 orders, 7 families, 19 genera and 25 species (Subfamily). The average indoor and outdoor rodent infestations was 0.84% and 0.95%, respectively. A total of 13 978 of captured rodents were examined and there were 4 749 rodents carried the fleas, the examined fleas were 21 species from 5 families and 15 genera, the average flea infected rate was 33.97%, the flea infected rate were different among rodents (χ²=749.167, P=0.000), and also there were significant differences among different areas (χ²=5 016.086, P=0.000). No plague bacterial was isolated among cultured 18 392 rodent samples, and all 5 380 sera samples tested negative. Conclusion The plague hosts, vectors and their densities have been kept at a relative stable level in recent years. However, the plague surveillance should be intensified for timely monitoring and responding to its outbreak risks.

Key words: Plague, Host, Density, Vector, Analysis