在地处热带和亚热带地区的发展中国家,钩虫感染仍然是一主要的公共卫生问题。近年来,许多地区的人群钩虫感染率和感染度有一定程度的下降,但是轻度或中度贫血的情况在一些地区的人群调查中仍占一定比例,重度感染引起的上消化道出血时有报 Hookworm infection remains a major public health problem in developing countries in the tropics and subtropics. In recent years, the prevalence and infection of hookworm in some areas have declined to some extent, but mild or moderate anemia still accounts for a certain proportion of the population survey in some areas. In the case of upper gastrointestinal bleeding caused by severe infection, Newspaper