Chines Journal of Vector Biology and Control ›› 2016, Vol. 27 ›› Issue (1): 65-67.DOI: 10.11853/j.issn.1003.4692.2016.01.021

• Investigation • Previous Articles     Next Articles

A preliminary analysis of a large number rat fleas (Xenopsylla cheopis) on Asian house rats (Rattus tanezumi) in Jinghong, Yunnan

WU Ai-guo1, LIN Gong-hua2, LI Yu-qiong1, TAO Ji-hong1, ZHAO Chun-hua3, ZHENG You-chun3, LI Bao-hua3   

  1. 1. Yunnan Institute of Endemic Diseases Control and Prevention, Dali 671000, Yunnan Province, China;
    2. Northwest Institute of Plateau Biology, Chinese Academy of Sciences;
    3. Jinghong Center for Disease Control and Prevention
  • Received:2015-11-02 Online:2016-02-20 Published:2016-02-20
  • Supported by:

    Supported by the National Natural Science Foundation of China (No. 81260416)

云南省景洪市黄胸鼠体表印鼠客蚤大量寄生现象的初步分析

吴爱国1, 林恭华2, 李玉琼1, 陶继宏1, 赵春花3, 郑有春3, 李保华3   

  1. 1. 云南省地方病防治所, 大理 671000;
    2. 中国科学院西北高原生物研究所, 青海 西宁 810008;
    3. 景洪市疾病预防控制中心, 云南 景洪 666100
  • 作者简介:吴爱国,男,主任技师,从事医学动物生态及动物分子生态研究,Email:wuaiguo698@163.com
  • 基金资助:

    国家自然科学基金(81260416)

Abstract:

Objective To investigate the aggregation characteristics of rat fleas (Xenopsylla cheopis) on Asian house rats (Rattus tanezumi) and to provide scientific basis for plague control. Methods We collected fleas from live-trapped rats and calculated two infestation indices: flea prevalence and average flea abundance. Results A total of 73 rats were trapped from four survey sites along the Lancang River in Jinghong, Yunnan, and from these rats we collected 1 169 rat fleas. There were 1 056 fleas in a single survey site called Manfeilong Reservoir Fish Fry Field, with a flea prevalence of 95.45% and an overall average flea abundance of 48.00, showing an unusually super parasitic phenomenon. Moreover, we also found that the sex ratio of the fleas in this study was male-predominant, very different from previous reports (from either field surveys or lab breeding populations). Conclusion Since high densities of rat (R. tanezumi) and flea (X. cheopis) represent an increased risk in zoonotic plague prevalence, we suggest that there is a considerable high probability in causing the human plague in Jinghong, and local government and disease control department should be highly cautious about it.

Key words: Xenopsylla cheopis, Super parasite, Rattus tanezumi, Plague

摘要:

目的 调查黄胸鼠体表印鼠客蚤的群体集聚分布特征,为鼠疫的防治提供依据。方法 于2013年2月20日至3月2日,采用笼捕法捕获鼠类进行鼠体蚤采集,计算鼠体染蚤率和蚤指数。结果 在景洪市沿澜沧江两岸的4个调查点共捕获黄胸鼠73只,从其体表采集到印鼠客蚤1 169匹,其中在曼飞龙水库鱼苗场调查点获蚤1 056匹,染蚤率为95.45%,总蚤指数高达48.00,形成罕见的鼠体蚤高密度群体超寄生现象。调查还发现印鼠客蚤的雌雄性比与既往调查及实验室繁殖有明显差别。结论 较高的黄胸鼠、印鼠客蚤密度是鼠疫发生流行的重要条件。景洪市一段时间后再度暴发鼠疫的可能性依然存在,应引起云南省各级政府及疾病控制部门的高度关注。

关键词: 印鼠客蚤, 群体超寄生, 黄胸鼠, 鼠疫

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