关键词: 鼠疫疫源地区, 宿主动物, 媒介蚤, 种群结构, 物种多样性

Abstract:

　　【Abstract】　Objective　To understand the population structure and distribution of host animals and fleas in historical flavipectus plague focus in ZheJiang, and to analyze the phenomenon of mixed and cross?channeling between house and wild mouse, so as to provide basic data for plague monitoring. Methods　The species diversity of plague hosts and fleas were analyzed based on the monitoring data in 2007-2008. Results　There were 3 orders, 4 families, 9 genus and 15 species animals found in historical flavipectus plague epidemic area, and about 4 families, 7genus, 7 species fleas were collected in this areas. Among the host animals, Rattus flavipectus accounted for 13.11%, 36.30% for R.norvegicus, 16.49% for Apodemus agrarius and 17.39% for Suncus  murinus. The fleas in those host were 32.91%, 42.20%, 14.56% and 0.74%, respectively. Leptopsylla segnis was the dominant species with the proportion of 64.34%. Monopsyllus anisus was 19.87% and Xenopsylla cheopis was 9.64%. The species diversity between host animals and fleas was significant difference. The index of species diversity was higher(H＞1), the population quantity of host animals was more stable. Conclusion　The quantity and species of host animals were very rich. The cross?channeling phenomenon between house and wild mouse was obvious. Some fleas can parasitize many species of rodents, which will cause a serious threaten to human once the plague prevailed among rodents occurs. Presently, the reliability of surveillance data in some surveillance sites can not be ensured, and the species of animal was also singular.

Key words: Historical plague areas, Host, Fleas, Population structure, Species diversity