Abulikem Abudurexit, HE Qing-song, WANG Xin-hui, WANG Shuo, Abulymit Matuohut, WANG Cheng, Mdin Kastai, Gliayi Bkaixi, LI Bo, Zhunusi Qaohanbke, LUO Tao, LI Wei
Objective Through the investigation of the plague natural infectious at Qinghe county in Altay district, to master the situation of plague natural foci in this district. Methods The investigation of rodents on fauna, species, density, and ectoparasites were conducted by the sandwich methods, route methods, site observation and others in Daqinghe, Xiaoqinghe, Bianhaizi, Zhonghaizi, Huahaizi, Halabaliqike, Qiaolakesaiyi and other mountains at Qinghe in Xinjiang during 2015-2017. IHA was used to test F1 antibody/antigen against plague; "Four-step test" was used to test Yersinia pestis. Results The preliminary investigation of mountains in Qinghe indicated that there were 5 species of rodents belonging to 5 genera and 3 families, including Marmota baibacina, Citellus undulatus, Clethrionomys rufocanus, Microtus gregalis, and Ochotona alpina. Among these, M. baibacina were distributed in forest steppe zones and mountain grassland at the altitude of 1 750-2 700 m, average density was 0.31 catches per hectare; C. undulatus were distributed in Huahaizi, Zhonghaizi, Bianhaizi, Halabaliqike, and Qiaolakesaiyi districts, average density was 4.60 catches C. undulatus per hectare; Four M. baibacinas and 552 C. undulatus were captured, infestation rate of fleas was 25% and 45%, respectively. The study used "Four-steptest" to detect Y. pestis, and used plague RIHA to test F1 antigen in 4 viscus samples from M. baibacina, 552 viscus samples from C. undulatus, 13 viscus samples and skeletons of self-dead M. baibacina and C. undulatus, as well as 583 fleas. The results of "Four-step test" and F1 antigen were negative. The IHA was used to test 552 serums of C. undulatus,the results indicated 1 serum sample was positive, positive rate was 0.18%, antibody titers was 1:29. The IHA was also used to test 129 sera of herding dogs, the results indicated 6 sera were positive, positive rate was 4.65%, the mean antibody titers was 1:23.83. Conclusion The study indicated the mountain areas have potential plague natural infections at Qinghe county in Xinjiang. It is suggested to conduct further investigation on plague foci of natural infections at Qinghe county in Xinjiang.
