Objective To investigate the optimal period for animal plague surveillance in Marmota himalayana plague foci located in the Altun Mountains on the Qinghai-Tibet Plateau, so as to provide a reference for plague surveillance and scientific prevention and control. Methods The concentration and circular distribution methods were used to analyze the seasonality of animal plague, and Rayleigh distribution test was used to analyze the concentration of the data distribution. Results A total of 293 marmots found dead were tested from 2020 to 2024, of which 123 were positive for Yersinia pestis, resulting in a 41.98% positive rate. Using the concentration method, M value was 0.755. The circular distribution method showed a mean angle of $\bar{\alpha}$=180.261° (r=0.751, Z=69.460, P<0.001). The peak day was July 3 and the peak period was from April 7 to September 27. Conclusions The study found obvious seasonality in animal plague in the Altun Mountains. It is recommended that the optimal surveillance period for plague in this region be set from April to September to provide scientific guidance for plague prevention and control.
SHA Han-yu, ZHENG Xiao-jin, Asaiti BUKAI, GAN Zhi-qiang, LU Xin-min, WANG Li, LYU Dong-yue, QIN Shuai, XIAO Meng, DUAN Ran, YANG Lin-xuan, JING Huai-qi, WANG Xin
. Determination of the optimal period for animal plague surveillance in Marmota himalayana plague foci in the Altun Mountains using concentration and circular distribution methods[J]. Chinese Journal of Vector Biology and Control, 2025
, 36(2)
: 232
-237
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DOI: 10.11853/j.issn.1003.8280.2025.02.015
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