Supplementary Material for: Gastroduodenal Strongyloidiasis diagnosed during Iron Deficiency Anemia workup

Introduction
The Strongyloides family includes at least fifty species of intestinal nematode worms, and Strongyloides stercoralis is the most prevalent one amongst humans. As a result of this parasite’s complex lifecycle, it can either remain localized in the intestines or disseminate to different organs throughout the body, culminating in autoinfection in case of immunosuppression. Strongyloidiasis is rarely encountered in the United States, and an associated gastric involvement is uncommon.
Case Presentation
In this case report, we describe the case of an asymptomatic and immunocompetent Liberian patient with gastroduodenal strongyloidiasis whose diagnosis was based on histologic findings during endoscopic evaluation for iron deficiency anemia.
Conclusion
This case sheds light on the importance of suspecting the diagnosis of disseminated strongyloidiasis in high-risk individuals with iron deficiency anemia in combination with peripheral eosinophilia.

引言
类圆线虫属（Strongyloides）包含至少50种肠道寄生线虫，其中粪类圆线虫（Strongyloides stercoralis）是人体中最为常见的种类。该寄生虫生活史复杂，既可局限于肠道内寄生，也可播散至全身各器官，在免疫抑制状态下可引发自身感染。类圆线虫病（Strongyloidiasis）在美国较为罕见，累及胃部的病例亦少见。

病例报告
本病例报告中，我们描述1例无症状且免疫功能正常的利比里亚患者，其胃十二指肠类圆线虫病（gastroduodenal strongyloidiasis）是因缺铁性贫血（iron deficiency anemia）行内镜检查时，通过组织病理学检查结果确诊的。

结论
本病例提示，对于合并外周血嗜酸性粒细胞增多（peripheral eosinophilia）的缺铁性贫血高危人群，应警惕播散性类圆线虫病的诊断。