Melaena due to hookworm infestation is a rare clinical presentation. It usually presents with symptoms of iron-deficiency anaemia owing to slow blood loss. Here we present a case of 45-year male who presented with a one-year history of intermittent melena requiring multiple blood transfusions. Preliminary endoscopies at different centres were normal. The presence of hookworm in the duodenum was only detected on repeat upper endoscopy as the cause of blood loss, and treatment with albendazole was successful in curing the patient.

中文翻译：

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钩虫感染是热带地区黑便的罕见原因：病例报告

钩虫感染引起的黑便是一种罕见的临床表现。由于失血缓慢，通常会出现缺铁性贫血的症状。我们在此介绍一例 45 岁男性病例，他有一年的间歇性黑便病史，需要多次输血。不同中心的初步内窥镜检查均正常。仅在重复上消化道内窥镜检查时才发现十二指肠中存在钩虫，这是失血的原因，并且阿苯达唑治疗成功治愈了患者。