目的　调查丽江市鼠疫自然疫源地犬及猫体蚤的种类及感染鼠疫菌情况, 为制定鼠疫防控措施提供科学依据。方法　调查共涉及丽江市玉龙县3个自然村, 古城区3个自然村, 于2007-2013年用药液给犬、猫洗澡的方法采集犬体蚤和猫体蚤, 按形态学方法鉴定蚤种类, 实验室用细菌培养方法检验犬体蚤、猫体蚤是否感染鼠疫菌。结果　本次调查共查犬93只, 带蚤犬74只, 平均染蚤率为79.57%, 平均蚤指数为2.63。获犬体蚤245匹, 全部为人蚤, 性比:为2.14:1, 雌性多于雄性。查猫37只, 有蚤猫28只, 平均染蚤率为75.68%, 平均蚤指数为2.46。猫体蚤91匹, 有人蚤和猫栉首蚤指名亚种2种, 总性比:为3.55:1, 雌性多于雄性。犬体蚤、猫体蚤鼠疫菌培养结果全部为阴性。结论　丽江鼠疫疫源地犬体蚤以人蚤为优势种, 猫体蚤以人蚤和猫栉首蚤指名亚种为优势种, 犬体蚤、猫体蚤均未检出鼠疫菌。

Objective To provide the basis for plague prevention and control by investigating in the flea species from dog and cat and infection rate of Yersinia pestis in the plague natural foci of Lijiang in Yunnan province. Methods Investigation was carried out at 3 villages of Yulong county and 3 villages of Gucheng district of Lijiang. Fleas on dog body and cat body were collected with insecticide bath, and identified based on morphological characteristics. Y. pestis was cultured from fleas in laboratory. Results There 93 dogs were investigated and there were fleas on 74 dogs, with average fleas infection rate is 79.57%, average fleas index is 2.63. Totally 245 fleas were collected from dog, and all are Pulex irritans. The sex ratio of fleas was 2.14:1. There were fleas on 28 of 37 investigated cats, average fleas infection rate is 75.68%, average fleas index is 2.46. Totally 91 fleas were collected, including P. irritans (46.15%), Ctenocephalides felis felis (53.85%). The sex ratio of cat fleas was 3.55:1. Infection of Y. pestis was negative for all fleas. Conclusion The P. irritans were predominat species to dog body fleas, P. irritans and C. felis felis were predominating species to cat body fleas. Infection of Y. pestis was not found.