Kasuya S, Khamboonruang C, Amano K, Murase T, Araki H, Kato Y, Kumada Y, Koyama A, Higuchi M, Nakamura J
Department of Parasitology, Gifu University School of Medicine, Japan.
J Trop Med Hyg. 1989 Oct;92(5):360-4.
Stool examination from primary schoolchildren in Chiang Mai Province, north Thailand, was performed to determine the present state of parasitic infections in this area. Out of a total of 491 children, 239 proved positive (48.7%). The most common type of parasite was found to be soil-transmitted helminths such as hookworm (26.3%) or Strongyloides stercoralis (11.2%), while Ascaris lumbricoides was not so prevalent (1.2% being positive in one school out of three). These results are in contrast to earlier reports showing higher prevalence rates, leading the authors to hypothesize that improvements in sanitary conditions and eradication projects have been effective. Opisthorchiasis is another parasitic disease with a relatively high prevalence rate of 7.5%. This disease rate increases with age and it was found in two out of three schools (8.3-15.8%) and was the most common type of helminth infection. Ascariasis was not seen in these two schools, but strongyloidiasis was found to be the second most prevalent helminthiasis, having a higher infection rate than hookworm. Therefore, eradication efforts now need to be directed toward eliminating opisthorchiasis and strongyloidiasis in addition to continuing to eradicate ascariasis and hookworm infections. The most common protozoal infection with a high pathogenicity in this region was found to be giardiasis (7.7%).
对泰国北部清迈省小学生进行粪便检查，以确定该地区寄生虫感染的现状。在总共491名儿童中，239名检测呈阳性（48.7%）。最常见的寄生虫类型是土壤传播的蠕虫，如钩虫（26.3%）或粪类圆线虫（11.2%），而蛔虫并不那么普遍（三所学校中有一所学校的阳性率为1.2%）。这些结果与早期报告显示的较高患病率形成对比，这使得作者推测卫生条件的改善和根除项目是有效的。华支睾吸虫病是另一种患病率相对较高的寄生虫病，为7.5%。这种疾病的发病率随年龄增长而增加，在三所学校中的两所学校发现了这种疾病（8.3 - 15.8%），并且是最常见的蠕虫感染类型。在这两所学校中未发现蛔虫病，但粪类圆线虫病被发现是第二常见的蠕虫病，其感染率高于钩虫。因此，除了继续根除蛔虫和钩虫感染外，现在的根除工作还需要针对消除华支睾吸虫病和粪类圆线虫病。该地区最常见且具有高致病性的原生动物感染是贾第虫病（7.7%）。
