河南省南阳盆地人体寄生虫分布的调查

HUMAN PARASITE DISTRIBUTION IN NANYANG BASIN, HENAN PROVINCE

南阳盆地是河南省最大的一块盆地，纬度偏南，地形特殊，是全省温度最高地区。１９８９年我们进行的人体寄生虫病分布调查，本片区为河南省寄生虫病流行最重地区，共检查１０３７９人，查见寄生虫感染者７８２１例，总感染率为７５．４％。共查见寄生虫１７种，主要寄生虫感染率分别为蛔虫４２．５％、鞭虫２２．８％、钩虫３８．２％、蛲虫２８．９％、溶组织内阿米巴３．０％、微小内蜒阿米巴５．４％、布氏嗜碘阿米巴０．６％、贾第虫６．５％和人芽囊原虫２．２％。ＰＶＣ－ＥＬＩＳＡ旋毛虫阳性率为７％，系全省最高。本盆地是河南省唯一以美洲钩虫为主的两种钩虫混合流行区。

Nanyang Basin is the largest basin in Henan Province. Owing to its special topography, the mean temperature in the Basin is the highest in Henan. Undoubtedly it is also the locality with the highest prevalence of human parasitic infections in the province. Of 10 379 persons from five sites examined, 7 821 were infected with parasites, the overall infection rate being 75.4%. A total of 17 species of parasites were found, among which, Ascaris lumbricoides (infection rate 42.5%), hookworm (38.2%), Enterobius vermicularis (28.9%) and Trichuris trichiura (22.8%) and 5 common species of protozoa were the predominant ones. Trichinella spiralis infection (7.0%) was also noteworthy. Necator americanus is the major species of hookworm in situ , a sole situation as compared with other places of Henan.