Objective To analyze the species composition, distribution, and fluctuation trend of main host animals and parasitic fleas on the body surface in an emerging field rodent plague focus in Yunnan province, China, to explore the relationship between the population ecological characteristics and the plague epidemic, and to provide a scientific basis for formulating plague prevention and control programs. Methods The surveillance data of plague hosts and vector fleas were collected at the monitoring site in Machang Village Committee, Heqing county, Yunnan province, 2012-2021. The descriptive statistical method was used to analyze the composition ratio and variation characteristics of the main host animals and vector fleas. Results During the survey period, 13 species of small mammals belonging to 11 genera, 6 families, 4 orders were discovered. There were 86 681 outdoor cages, and 3 618 small mammals were captured, with a capture rate of 4.17%, including 73.52% (2 660/3 618) of Eothenomys miletus and 18.71% (677/3 618) of Apodemus chevrieri. The main host animals and dominant species were E. miletus and A. chevrieri. A total of 3 082 fleas were discovered in 7 species belonging to 7 genera, 4 families. A total of 3 010 fleas were collected on the body surface of E. miletus and A. chevrieri, including 87.87% (2 645/3 010) of Ctenophthalmus quadratus, 11.20% (337/3 010) of Neopsylla specialis and 0.86% (26/3 010) of Frontopsylla spadix. N. specialis and F. spadix were the main vector fleas, and C. quadratus were the dominant species and the secondary vector fleas. Conclusion In the emerging plague focus in Heqing county, the population ecological characteristics of main host animals and vector fleas, such as the composition and fluctuation trend, were closely related to the plague epidemic. It is of great significance for the prediction and early warning of plague epidemic by monitoring and analyzing the population ecological characteristics of main host animals and vector fleas.
DUAN Biao, ZHANG Xue-hua, ZHAO Cai-feng, HONG Mei, SU Li-qiong, YANG Zhi-ming, PU Dan-ya
. Species composition and population ecological characteristics of main host animals and vector fleas in an emerging field rodent plague focus in Yunnan province, China[J]. Chinese Journal of Vector Biology and Control, 2022
, 33(6)
: 809
-814
.
DOI: 10.11853/j.issn.1003.8280.2022.06.008
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