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棕形额蚤Frontopsylla spadix是一广布蚤种,在云南剑川野鼠鼠疫疫源地种群组成中居第4位,是齐氏姬鼠、黄胸鼠、褐家鼠的重要寄生蚤之一,在该疫源地棕形额蚤的自然感染率为0.67％,1975～1994年从此蚤分离到鼠疫菌14株,仅次于方叶栉眼蚤而高于特新蚤指名亚种。为弄清云南剑川野鼠鼠疫疫源地主要蚤种的媒介地位,作者系统研究了棕形额蚤传播鼠疫的媒介效能。1 材料和方法1.1 材料1.1.1 实验室 全自动恒温恒湿室,面积10m~2,温度19±0.5C,湿度80±5％。1.1.2 实验动物 齐氏姬鼠和大绒鼠捕自非疫区
Frontopsylla spadix is one of the most widely distributed species of fleas in China. It ranks 4th among the plague foci in Jianchuan, Yunnan Province. It is one of the most important parasitic fleas for Apodemus agkistrodon, Rattus flavipectus and Rattus norvegicus. The natural infection rate of the brown-headed flea was 0.67%. From 1975 to 1994, 14 strains of Y. pestis were isolated from this flea, second only to the square-leaf-swamp flea and higher than that of the new flea. To clarify the media status of the main flea species in the plague foci of Yunnan Jianchuan Horseshoe, the author systematically studied the vector efficacy of the plague-transmitted plague. 1 Materials and methods 1.1 Materials 1.1.1 Laboratory Automatic constant temperature and humidity chamber, an area of 10m ~ 2, temperature 19 ± 0.5C, humidity 80 ± 5%. 1.1.2 Experimental animals Qi mice and pachyderm captured from the non-infected area