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Volume 27, Number 10—October 2021
Synopsis

Distribution and Characteristics of Human Plague Cases and Yersinia pestis Isolates from 4 Marmota Plague Foci, China, 1950–2019

Zhaokai He1, Baiqing Wei1, Yujiang Zhang1, Jun Liu1, Jinxiao Xi1, Dunzhu Ciren1, Teng Qi1, Junrong Liang, Ran Duan, Shuai Qin, Dongyue Lv, Yuhuang Chen, Meng Xiao, Rong Fan, Zhizhong Song, Huaiqi Jing, and Xin WangComments to Author 
Author affiliations: National Institute for Communicable Disease Control and Prevention, Beijing, China (Z. He, J. Liang, R. Duan, S. Qin, D. Lv, M. Xiao, R. Fan, H. Jing, X. Wang); Qinghai Institute for Endemic Disease Control and Prevention, Xining, China (B. Wei); Center for Disease Control and Prevention of Xinjiang Uygur Autonomous Region, Urumqi, China (Y. Zhang); Inner Mongolia Autonomous Region Comprehensive Center for Disease Control and Prevention, Hohhot, China (J. Liu); Gansu Provincial Centre for Disease Control and Prevention, Lanzhou, China (J. Xi); Center for Disease Control and Prevention of Tibet Autonomous Region, Lhasa, China (D. Ciren); Sichuan Center for Disease Control and Prevention, Chengdu, China (T. Qi); Shenzhen Nanshan Maternity and Child Healthcare Hospital, Shenzhen, China (Y. Chen); Yunnan Center for Disease Control and Prevention, Kunming, China (Z. Song)

Main Article

Figure 5

Number of Yersinia pestis isolates and human plague cases in Marmota plague foci, China, 1950–2019. Columns represent 5-year intervals. The 3 plague foci from which Y. pestis isolates have been collected are the Marmota himalayana plague focus of the Qinghai-Tibet Plateau, which includes Qinghai Province, Gansu Province, Tibet Autonomous Region, Sichuan Province, and Xinjiang Uygur Autonomous Region; the Marmota baibacina–Spermophilus undulatus plague focus of the Tianshan Mountains, Xinjiang Uygur Autonomous Region; and the Marmota caudata plague focus of the Pamir Plateau, Xinjiang Uygur Autonomous Region. A) Number of Y. pestis isolates collected from humans, animal hosts, and insect vectors. Lowercase letters at top indicate periods of isolate collection: a) early attempts during 1950–1959; b) increased diagnosis and animal plague surveillance increased number isolates collected during 1960–2009; and c) decrease in isolates likely due to decreasing numbers of dead marmot species found around active Y. pestis areas during 2010–2019. B) Number of human plague cases and case-fatality rates.

Figure 5. Number of Yersinia pestis isolates and human plague cases in Marmota plague foci, China, 1950–2019. Columns represent 5-year intervals. The 3 plague foci from which Y. pestis isolates have been collected are the Marmota himalayana plague focus of the Qinghai-Tibet Plateau, which includes Qinghai Province, Gansu Province, Tibet Autonomous Region, Sichuan Province, and Xinjiang Uygur Autonomous Region; the Marmota baibacina–Spermophilus undulatus plague focus of the Tianshan Mountains, Xinjiang Uygur Autonomous Region; and the Marmota caudata plague focus of the Pamir Plateau, Xinjiang Uygur Autonomous Region. A) Number of Y. pestis isolates collected from humans, animal hosts, and insect vectors. Lowercase letters at top indicate periods of isolate collection: a) early attempts during 1950–1959; b) increased diagnosis and animal plague surveillance increased number isolates collected during 1960–2009; and c) decrease in isolates likely due to decreasing numbers of dead marmot species found around active Y. pestis areas during 2010–2019. B) Number of human plague cases and case-fatality rates.

Main Article

1These authors contributed equally to this article.

Page created: July 21, 2021
Page updated: October 13, 2021
Page reviewed: October 13, 2021
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