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Volume 23, Number 2—February 2017
Synopsis

Changing Epidemiology of Human Brucellosis, China, 1955–2014

Shengjie Lai1, Hang Zhou1, Weiyi Xiong1, Hongjie Yu, Zhuojie Huang, Jianxing Yu, Wenwu Yin, Liping Wang, Qiulan Chen, Yu Li, Di Mu, Lingjia Zeng, Xiang Ren, Mengjie Geng, Zike Zhang, Buyun Cui, Tiefeng Li, Dali Wang, Qiao Sun, Nicola A. Wardrop, Andrew J. Tatem, and Sheng WeiComments to Author 
Author affiliations: Division of Infectious Disease, Key Laboratory of Surveillance and Early-Warning on Infectious Disease, Chinese Center for Disease Control and Prevention, Beijing, China (S. Lai, H. Zhou, W. Xiong, Z. Huang, J. Yu, W. Yin, L. Wang, Q. Chen, Y. Li, D. Mu, L. Zeng, X. Ren, M. Geng, Z. Zhang, Z. Li, H. Yu); WorldPop, Geography and Environment, University of Southampton, Southampton, UK (S. Lai, N.A. Wardrop, A.J. Tatem); Flowminder Foundation, Stockholm, Sweden (S. Lai, A.J. Tatem); School of Public Health, Fudan University, Key Laboratory of Public Health Safety, Ministry of Education, Shanghai, China (S. Lai, H. Yu); Universite´ Libre de Bruxelles, Brussels, Belgium (M. Gilbert); Fonds National de la Recherche Scientifique, Brussels (M. Gilbert); Institute of Pathogen Biology, Chinese Academy of Medical Sciences, Beijing (J. Yu); Zhejiang University, Hangzhou, China (Z. Zhang); National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing (B. Cui); Base of Plague and Brucellosis Prevention and Control, Chinese Center for Disease Control and Prevention, Beijing (T. Li, D. Wang)

Main Article

Table

Characteristics of persons with brucellosis, mainland China, 2004–2014*

Characteristic Total, N = 346,682 Northern China, n = 344,204 Southern China, n = 2,478
      Type of case
      Confirmed       314,694 (90.8)       312,371 (90.8)       2,323 (93.7)
      Probable
       31,988 (9.2)
       31,833 (9.2)
       155 (6.3)
      Sex
      M       42,912 (73.8)       42,166 (73.9)       746 (71.0)
      F
       15,230 (26.2)
       14,926 (26.1)
       304 (29.0)
      Age, y
      Median (IQR)       44.0 (34.1–53.9)       44.0 (34.1–53.9)       46.6 (36.6–56.1)
      Age group
      0–4       2,424 (0.7)       2,402 (0.7)       22 (0.9)
      5–14       6,638 (1.9)       6,596 (1.9)       42 (1.7)
      15–24       25,262 (7.3)       25,108 (7.3)       154 (6.2)
      25–34       57,651 (16.6)       57,313 (16.7)       338 (13.6)
      35–44       90,777 (26.2)       90,209 (26.2)       568 (22.9)
      45–54       87,566 (25.3)       86,901 (25.2)       665 (26.8)
      55–64       57,274 (16.5)       56,765 (16.5)       509 (20.5)
      >65
       19,090 (5.5)
       18,910 (5.5)
       180 (7.3)
      Median delay, d (IQR)
      From illness onset to diagnosis       20.0 (7.5–42.0)       20.0 (7.5–42.0)       20.7 (8.5–47.5)
      From diagnosis to report       0.25 (0.04–0.65)       0.25 (0.04–0.65)       0.15 (0.04–0.66)
      From illness onset to report
       20.6 (7.8–43.4)
       20.6 (7.8–43.4)
       19.5 (8.0–44.7)
      Origin of imported case
      Same county       205,941 (59.4)       204,912 (59.5)       1,029 (41.5)
      Other county of same prefecture       92,351 (26.6)       91,628 (26.6)       723 (29.2)
      Other prefecture of same province       32,584 (9.4)       32,088 (9.3)       496 (20)
      Other province       15,806 (4.6)       15,576 (4.5)       230 (9.3)

*The list of provinces in northern and southern China is available in online Technical Appendix Table 5, https://wwwnc.cdc.gov/EID/article/23/3/16-1710-Techapp1.pdf. Data are presented as no. (%) patients unless otherwise indicated. IQR, interquartile range.

Main Article

1These authors contributed equally to this article.

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