关键词: 川藏铁路, 鼠疫, 分析

Abstract: Objective To investigate and analyze the plague surveillance data along the Lhasa-Nyingchi (LN) section of the Sichuan-Tibet Railway in 2012-2017, and to provide plague control measures and related basis for the safety of construction and operation of the LN section of the Sichuan-Tibet Railway. Methods According to the requirements of National Plague Surveillance Program and Plague Surveillance Program of Tibet Autonomous Region, investigation of plague host animals and serological and bacteriological tests were carried out along the construction site of the LN Railway. Results No human plague was found along the construction site of the LN Railway from 2012 to 2017, but the plague among animals showed a continuous epidemic. Yersinia pestis was detected every year from 2012 to 2017, with a total of 38 strains found. A total of 105 976 hm² of plague foci were investigated along the LN section of the Sichuan-Tibet Railway construction site, and 3 075 marmots were found with a mean density of 0.029 inds/hm²; a total of 4 465 dry fleas from marmot burrows were investigated, and 35 were captured with a flea index of 0.008; a total of 605 dead marmot specimens were tested, and 38 (6.281%) of them were positive; in order to investigate small mammals, 28 807 clips were laid, and 136 small mammals (0.472%) were captured; a total of 107 small rodents were combed, and 14 fleas were obtained with a flea index of 0.131; a total of 6 848 serum samples were tested, including 4 014 dog serum samples, of which 5 (0.125%) were positive, as well as 2 834 Tibetan ovium serum samples, all of which were negative. Conclusion Although there was no human plague epidemic along the LN section of the Sichuan-Tibet Railway, the epidemic among animals was active. All units along the railway should do a good job in monitoring plague epidemic among animals.

Key words: Sichuan-Tibet Railway, Plague, Analysis