soil-transmitted helminth infections and correlated risk factors in preschool and school-aged children in rural southwest china土壤传播寄生虫感染和相关危险因素在学龄前和学龄儿童在农村中国西南部.pdf

Soil-Transmitted Helminth Infections and Correlated Risk Factors in Preschool and School-Aged Children in Rural Southwest China 1 1 1 2 2 3 Xiaobing Wang , Linxiu Zhang *, Renfu Luo , Guofei Wang , Yingdan Chen , Alexis Medina , 3 3 4,5 Karen Eggleston , Scott Rozelle , D. Scott Smith 1 Center for Chinese Agricultural Policy, Institute for Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China, 2 National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Shanghai, China, 3 Freeman Spogli Institute, Stanford University, Stanford, California, United States of America, 4 Stanford University School of Medicine, Stanford, California, United States of America, 5 Department of Internal Medicine, Kaiser Permanente Medical Group, Redwood City, California, United States of America Abstract We conducted a survey of 1707 children in 141 impoverished rural areas of Guizhou and Sichuan Provinces in Southwest China. Kato-Katz smear testing of stool samples elucidated the prevalence of ascariasis, trichuriasis and hookworm infections in pre-school and school aged children. Demographic, hygiene, household and anthropometric data were collected to better understand risks for infection in this population. 21.2 percent of pre-school children and 22.9 percent of school aged children were infected with at least one of the three types of STH. In Guizhou, 33.9 percent of pre-school children were infected, as were 40.1 percent of school aged children. In Sichuan, these numbers were 9.7 percent and 6.6 percent, respectively. Number of