A 29-year-old man presented with a 2-month history of bright red blood from the rectum. He lived in the interior of northeastern Brazil and regularly bathed in rivers.

中文翻译：

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慢性直肠血吸虫病


一名 29 岁男性因直肠流出鲜红色血液已有 2 个月病史。他住在巴西东北部的内陆地区，经常在河里洗澡。