肠血吸虫病是血吸虫病引起全身多脏器疾病中的主要部分之一,是引起该病患者下消化道出血的常见原因。其晚期患者结肠癌的发病率比一般人群几乎要多30倍。急性血吸虫病在肠道主要为急性血吸虫性结肠炎,表现为痢疾样脓血便、急性大出血者少见。一般根据流行病学资料,粪检中易找到虫卵等,诊断不难。晚期血吸虫病引起消化道出血可分为二个方面:(1)血吸虫病所致肝硬化并发食道、胃底静脉曲张破裂,引起上消化道出血;(2)血吸虫病结肠病变引起下消化道出血。现重点讨论血吸虫性结肠病与下消化道出血的有关问题。血吸虫性结肠病是血吸虫感染所致结肠损害引起临床病症的总称。病变是由寄生在结肠静脉小分支内的虫卵沉积于肠壁各层所引起,可广布于整段结肠,但以左侧居多,尤以直肠和乙状结肠最常见 Intestinal schistosomiasis is one of the major components of systemic multi-organ disease caused by schistosomiasis and is a common cause of lower gastrointestinal bleeding in this patient. The incidence of colon cancer in its advanced patients is almost 30 times more than the general population. Acute schistosomiasis in the intestine is mainly acute schistosomiasis, manifested as dysentery-like purulent blood, acute bleeding are rare. Generally based on epidemiological data, fecal seizures easy to find eggs, diagnosis is not difficult. Gastrointestinal bleeding caused by advanced schistosomiasis can be divided into two aspects: (1) cirrhosis of the liver caused by schistosomiasis complicated by esophageal and gastric varices, causing upper gastrointestinal bleeding; (2) schistosomiasis caused by colonic lesions of lower gastrointestinal bleeding . Now focus on schistosomiasis colonic disease and lower gastrointestinal bleeding related issues. Schistosomiasis is a general term for clinical conditions that cause colon damage caused by schistosomiasis. Lesions are caused by parasites deposited in small intestine in the small branch of the colon caused by the layers of the intestinal wall can be widely distributed in the entire colon, but to the left mostly, especially the most common rectum and sigmoid colon