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1·Two parasites Ancylostoma duodenale and Necator americanus cause hookworm disease.

两种寄生虫为十二指肠钩虫和美洲轮虫引起钩虫病。

2·The results indicated that it was necessary to prevent hookworm disease in Changsha.

可见，长沙市钩虫感染比较严重，开展钩虫病的预防工作十分必要。

3·Object: to aim at making the control projection of hookworm disease in Hubei Province.

目的：为制定全省性钩虫病防治规划提供依据。