Volume 20, Number 11—November 2014
Dispatch
Increasing Prevalence and Intensity of Foodborne Clonorchiasis, Hengxian County, China, 1989–2011
Table 1
Standardized prevalence of parasitic diseases, as determined from 3 surveys, Hengxian County, China, 1989–2011*
Infection | Prevalence, % |
||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Survey 1, 1989 |
Survey 2, 2002 |
Survey 3, 2011 |
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Female, n = 1,134† | Male, n = 1,227‡ | Total, n = 2,361§ | Female, n = 775¶ | Male, n = 925‖ | Total, n = 1,700# | Female, n = 1,641 | Male, n = 1,796 | Total, n = 3,437 | |||
Clonorchiasis |
10.4 |
28.5 |
19.7 |
20.8 |
39.6 |
30.5 |
29.2 |
62.9 |
46.5 |
||
Soil-transmitted helminthiases** | 86.2 | 86.3 | 86.3 | 29.5 | 20.9 | 25.1 | 9.4 | 4.7 | 7.0 | ||
Roundworms | 70.1 | 69.6 | 69.8 | 16.9 | 10.9 | 13.8 | 0.5 | 0.4 | 0.5 | ||
Whipworms | 57.0 | 54.5 | 55.7 | 13.1 | 9.4 | 11.2 | 1.7 | 1.0 | 1.4 | ||
Hookworms | 27.8 | 21.1 | 24.3 | 7.8 | 4.9 | 6.3 | 7.5 | 3.2 | 5.3 |
*Population data were derived from the 2010 census for Hengxian County.
†117 children <5 years of age were excluded.
‡145 children <5 years of age were excluded.
§262 children <5 years of age were excluded.
¶24 children <5 years of age were excluded.
‖24 children <5 years of age were excluded.
#48 children <5 years of age were excluded.
**Some participants were infected with >1 type of helminth.