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Volume 11, Number 8—August 2005

Letter

Echinococcosis, Ningxia, China

Yu Rong Yang*†, Tao Sun†, Zhengzhi Li†, Xiuping Li†, Rui Zhao†, Li Cheng‡, Xiao Pan§, Philip S. Craig¶, Dominique A. Vuitton#, and Donald P. McManus*Comments to Author 
Author affiliations: *Queensland Institute of Medical Research, Brisbane, Queensland, Australia; †Ningxia Medical College, Ningxia Hui Autonomous Region, China; ‡The Second Provincial Hospital of Ningxia Hui Autonomous Region, Ningxia, China; §Xiji County Hospital, Xiji, Ningxia Hui Autonomous Region, China; ¶University of Salford, Salford, United Kingdom; #WHO Collaborating Centre for Prevention and Treatment of Human Echinococcosis, Besancon, France

Main Article

Table

Average incidence of human echinococcosis (AE/CE combined), 1994–2001, and incidence compared for ethnicity (Han/Hui) in southern Ningxia and Yinchuan City*

Location (population) 1994–2001
Ethnicity comparison
Hui (1994–2001)
Han (1994–2001)
Cases Incidence† %‡ Cases Incidence† %‡ Cases Incidence† IRR 95% CI
Ningxia
Tongxin (328,700) 353 13.42 81.49 291 13.58 18.48 62 12.75 0.94 0.71–1.25§
Haiyuan (344,000) 305 11.08 70.58 195 10.04 28.52 110 14.01 1.40 1.10–1.77
Guyuan (470,700) 226 6.00 43.23 108 6.63 56.70 118 5.52 0.83 0.64–1.09§
Xiji (403,100) 198 6.14 52.00 89 5.30 47.99 109 7.04 1.33 0.99–1.77§
Pengyang (231,000) 101 5.46 29.77 46 8.36 70.23 55 4.24 0.51 0.34–0.76
Longde (197,300) 8 0.50 8.98 1 0.70 91.01 7 0.53 0.76 0.1–16§
Jingyuan (81.301) 1 0.15 96.50 1 0.15 3.48 0 0 §
Subtotal (2,056,101) 1,192 7.24
Yinchuan (1,614,700) 165 1.27 18.36 59 2.48 79.88 106 1.02 0.41 0.3–0.57
Total (3,670,801) 1,357 4.62 33.88 790 7.94 65.47 567 2.94 0.37 0.33–0.41

*AE, alveolar echinococcosis; CE, cystic echinococcosis; IRR, incidence risk ratio; CI, confidence interval.
†Cases/100,000/year.
‡Ethnicity composition ratio (%) at each location.
§Comparison between ethnicity composition ratio and incidence not significant.

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