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  • Title: Epidemiology of human intestinal nematode infections in Wujiang and Pizhou counties, Jiangsu Province, China.
    Author: Fenghua S, Zhongxing W, Yixing Q, Hangqun C, Haichou X, Hainan R, Shuhua X, Bin Z, Hawdon JM, Zheng F, Hotez PJ.
    Journal: Southeast Asian J Trop Med Public Health; 1998 Sep; 29(3):605-10. PubMed ID: 10437966.
    Abstract:
    Intestinal nematode infections are considered highly endemic in the Chinese province of Jiangsu. In May 1997, the prevalence of intestinal nematodes infections was determined among all of the inhabitants aged 5 to 65 of the southern Jiangsu village of Yaojiakon (Wujiang County) and the northern Jiangsu village of Jianmiao (Pizhou County). It was determined that the prevalence of ascariasis, trichuriasis and hook worm infection was greatly reduced compared to when it was last measured in 1990. The reduction was noted to be particularly impressive in Yaojiakon village where the prevalence of ascariasis and trichiuriasis fell to 2% and 1.5% respectively. Much of this reduction was attributed to improvements in economic development which have occurred in southern Jiangsu Province at a rapid pace. In contrast, the reduction in nematode infections among villagers living in northern Jiangsu was more modest. The most striking reduction in both villages was in school-aged children who since 1988 have received yearly treatments with anthelminthic drugs. The intensity of nematode infections was investigated for hookworm where 70% of hookworm-infected Yaojiakon villagers were found to harbor light infections (< 400 eggs per gram) compared to 83% of hookworm-infected Jianmiao villagers. Necator americanus was the predominant hookworm in Yaojiakon village (South), whereas Ancylostoma duodenale predominated in Jianmiao village (North). The majority (76%) of hookworm-infected patients developed IgG antibodies against N. americanus antigen, although 20% of uninfected patients living in the village also had circulating antibodies. Intestinal nematode infections continue to be a significant public health problem in Jiangsu Province although their prevalence has decreased since 1990.
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